/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/openbsd_cmemchr-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:49:23,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:49:23,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:49:23,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:49:23,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:49:23,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:49:23,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:49:23,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:49:23,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:49:23,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:49:23,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:49:23,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:49:23,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:49:23,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:49:23,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:49:23,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:49:23,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:49:23,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:49:23,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:49:23,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:49:23,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:49:23,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:49:23,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:49:23,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:49:23,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:49:23,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:49:23,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:49:23,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:49:23,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:49:23,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:49:23,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:49:23,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:49:23,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:49:23,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:49:23,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:49:23,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:49:23,345 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 16:49:23,377 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:49:23,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:49:23,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:49:23,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:49:23,381 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:49:23,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:49:23,381 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:49:23,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:49:23,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:49:23,382 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:49:23,383 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:49:23,383 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:49:23,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:49:23,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:49:23,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:49:23,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:49:23,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:49:23,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:49:23,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:49:23,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:49:23,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:49:23,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:49:23,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:49:23,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:49:23,386 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:49:23,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:49:23,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:49:23,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:49:23,816 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:49:23,817 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:49:23,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2020-12-23 16:49:23,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/15e74a38f/3bba350866dc4bb09f90f3197fcdd997/FLAG27ac603d3 [2020-12-23 16:49:24,612 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:49:24,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2020-12-23 16:49:24,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/15e74a38f/3bba350866dc4bb09f90f3197fcdd997/FLAG27ac603d3 [2020-12-23 16:49:24,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/15e74a38f/3bba350866dc4bb09f90f3197fcdd997 [2020-12-23 16:49:24,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:49:24,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:49:24,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:49:24,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:49:24,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:49:24,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:49:24" (1/1) ... [2020-12-23 16:49:24,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44872bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:24, skipping insertion in model container [2020-12-23 16:49:24,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:49:24" (1/1) ... [2020-12-23 16:49:24,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:49:24,957 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetArea~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetArea~0,],offset],IdentifierExpression[~i~0,]]]] [2020-12-23 16:49:25,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:49:25,281 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetArea~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetArea~0,],offset],IdentifierExpression[~i~0,]]]] [2020-12-23 16:49:25,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:49:25,450 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:49:25,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25 WrapperNode [2020-12-23 16:49:25,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:49:25,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:49:25,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:49:25,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:49:25,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (1/1) ... [2020-12-23 16:49:25,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (1/1) ... [2020-12-23 16:49:25,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:49:25,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:49:25,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:49:25,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:49:25,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (1/1) ... [2020-12-23 16:49:25,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (1/1) ... [2020-12-23 16:49:25,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (1/1) ... [2020-12-23 16:49:25,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (1/1) ... [2020-12-23 16:49:25,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (1/1) ... [2020-12-23 16:49:25,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (1/1) ... [2020-12-23 16:49:25,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (1/1) ... [2020-12-23 16:49:25,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:49:25,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:49:25,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:49:25,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:49:25,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (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 16:49:25,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:49:25,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:49:25,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:49:25,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:49:25,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:49:25,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:49:25,905 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:49:25,905 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 16:49:25,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:25 BoogieIcfgContainer [2020-12-23 16:49:25,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:49:25,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:49:25,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:49:25,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:49:25,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:49:24" (1/3) ... [2020-12-23 16:49:25,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4864a9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:49:25, skipping insertion in model container [2020-12-23 16:49:25,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:25" (2/3) ... [2020-12-23 16:49:25,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4864a9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:49:25, skipping insertion in model container [2020-12-23 16:49:25,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:25" (3/3) ... [2020-12-23 16:49:25,916 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2020-12-23 16:49:25,923 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:49:25,927 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-23 16:49:25,970 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-23 16:49:26,004 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:49:26,004 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:49:26,005 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:49:26,005 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:49:26,005 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:49:26,005 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:49:26,005 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:49:26,006 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:49:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-23 16:49:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:49:26,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:26,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:26,042 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:26,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:26,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-23 16:49:26,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:26,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864618115] [2020-12-23 16:49:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:26,301 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 16:49:26,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864618115] [2020-12-23 16:49:26,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:26,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:49:26,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678158791] [2020-12-23 16:49:26,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:49:26,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:26,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:49:26,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:49:26,340 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-12-23 16:49:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:26,419 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-12-23 16:49:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:49:26,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:49:26,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:26,435 INFO L225 Difference]: With dead ends: 25 [2020-12-23 16:49:26,437 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 16:49:26,446 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 16:49:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 16:49:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 16:49:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 16:49:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-23 16:49:26,489 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 7 [2020-12-23 16:49:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:26,490 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-23 16:49:26,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:49:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-23 16:49:26,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:49:26,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:26,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:26,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:49:26,493 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2020-12-23 16:49:26,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:26,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198699642] [2020-12-23 16:49:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:26,651 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 16:49:26,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198699642] [2020-12-23 16:49:26,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:26,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:49:26,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72096475] [2020-12-23 16:49:26,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:26,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:26,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:26,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:26,655 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-12-23 16:49:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:26,703 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-12-23 16:49:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:49:26,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 16:49:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:26,705 INFO L225 Difference]: With dead ends: 27 [2020-12-23 16:49:26,705 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 16:49:26,706 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 16:49:26,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 16:49:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-23 16:49:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 16:49:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-23 16:49:26,711 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2020-12-23 16:49:26,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:26,711 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-23 16:49:26,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-23 16:49:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:49:26,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:26,713 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:26,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:49:26,713 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:26,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:26,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2020-12-23 16:49:26,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:26,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331566832] [2020-12-23 16:49:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:26,772 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 16:49:26,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331566832] [2020-12-23 16:49:26,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427771491] [2020-12-23 16:49:26,773 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 16:49:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 16:49:26,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:26,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:49:26,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-23 16:49:26,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679611368] [2020-12-23 16:49:26,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:26,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:26,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:26,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:26,934 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2020-12-23 16:49:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:26,970 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-12-23 16:49:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:26,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 16:49:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:26,972 INFO L225 Difference]: With dead ends: 44 [2020-12-23 16:49:26,972 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 16:49:26,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 16:49:26,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-23 16:49:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 16:49:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 16:49:26,978 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2020-12-23 16:49:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:26,978 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 16:49:26,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 16:49:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:49:26,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:26,980 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:27,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 16:49:27,195 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:27,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1579537130, now seen corresponding path program 1 times [2020-12-23 16:49:27,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:27,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808421430] [2020-12-23 16:49:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:27,276 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 16:49:27,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808421430] [2020-12-23 16:49:27,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779645930] [2020-12-23 16:49:27,277 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 16:49:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:27,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:49:27,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:27,381 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 16:49:27,383 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:27,390 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:27,391 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:27,391 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:27,448 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 16:49:27,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:27,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:49:27,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114459850] [2020-12-23 16:49:27,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:49:27,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:27,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:49:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:49:27,451 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2020-12-23 16:49:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:27,512 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-23 16:49:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:27,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 16:49:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:27,513 INFO L225 Difference]: With dead ends: 32 [2020-12-23 16:49:27,514 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 16:49:27,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 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 16:49:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 16:49:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-23 16:49:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 16:49:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-23 16:49:27,519 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2020-12-23 16:49:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:27,520 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-23 16:49:27,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:49:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-23 16:49:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:49:27,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:27,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:27,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:27,737 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:27,739 INFO L82 PathProgramCache]: Analyzing trace with hash -373722351, now seen corresponding path program 1 times [2020-12-23 16:49:27,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:27,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751059944] [2020-12-23 16:49:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:27,799 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 16:49:27,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751059944] [2020-12-23 16:49:27,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:27,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:49:27,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115494614] [2020-12-23 16:49:27,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:49:27,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:27,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:49:27,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:49:27,803 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-12-23 16:49:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:27,885 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-12-23 16:49:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:49:27,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 16:49:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:27,886 INFO L225 Difference]: With dead ends: 30 [2020-12-23 16:49:27,886 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 16:49:27,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:49:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 16:49:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-23 16:49:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:49:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-23 16:49:27,891 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2020-12-23 16:49:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:27,892 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-23 16:49:27,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:49:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-23 16:49:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:49:27,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:27,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:27,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:49:27,893 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:27,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:27,894 INFO L82 PathProgramCache]: Analyzing trace with hash -373722350, now seen corresponding path program 1 times [2020-12-23 16:49:27,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:27,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333564893] [2020-12-23 16:49:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:28,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333564893] [2020-12-23 16:49:28,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920541801] [2020-12-23 16:49:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:28,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 16:49:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:28,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:28,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2020-12-23 16:49:28,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682642392] [2020-12-23 16:49:28,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:49:28,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:28,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:49:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:49:28,212 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 13 states. [2020-12-23 16:49:28,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:28,432 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-12-23 16:49:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:49:28,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-12-23 16:49:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:28,434 INFO L225 Difference]: With dead ends: 34 [2020-12-23 16:49:28,434 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 16:49:28,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:49:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 16:49:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-12-23 16:49:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 16:49:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-23 16:49:28,438 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2020-12-23 16:49:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:28,439 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-23 16:49:28,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:49:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-23 16:49:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:49:28,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:28,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:28,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:28,655 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:28,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1300245881, now seen corresponding path program 1 times [2020-12-23 16:49:28,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:28,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226825516] [2020-12-23 16:49:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226825516] [2020-12-23 16:49:28,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437403421] [2020-12-23 16:49:28,802 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 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 16:49:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:28,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 16:49:28,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:28,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:49:28,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2020-12-23 16:49:28,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208776630] [2020-12-23 16:49:28,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:28,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:49:28,918 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-12-23 16:49:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:28,947 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-12-23 16:49:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:28,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 16:49:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:28,948 INFO L225 Difference]: With dead ends: 29 [2020-12-23 16:49:28,949 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 16:49:28,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:49:28,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 16:49:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 16:49:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 16:49:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-23 16:49:28,952 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2020-12-23 16:49:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:28,953 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-23 16:49:28,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-23 16:49:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 16:49:28,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:28,954 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:29,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:29,168 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1656754904, now seen corresponding path program 1 times [2020-12-23 16:49:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:29,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108852798] [2020-12-23 16:49:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:29,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108852798] [2020-12-23 16:49:29,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:29,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:49:29,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510468140] [2020-12-23 16:49:29,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:29,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:29,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:29,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:29,294 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-12-23 16:49:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:29,356 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-23 16:49:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:29,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-23 16:49:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:29,360 INFO L225 Difference]: With dead ends: 33 [2020-12-23 16:49:29,360 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 16:49:29,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 16:49:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 16:49:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 16:49:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 16:49:29,368 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2020-12-23 16:49:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:29,368 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 16:49:29,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 16:49:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 16:49:29,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:29,373 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:29,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:49:29,373 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:29,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1617144038, now seen corresponding path program 1 times [2020-12-23 16:49:29,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:29,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940452512] [2020-12-23 16:49:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:29,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940452512] [2020-12-23 16:49:29,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878761507] [2020-12-23 16:49:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:49:29,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:29,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:29,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-23 16:49:29,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804398463] [2020-12-23 16:49:29,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 16:49:29,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:29,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 16:49:29,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:49:29,704 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2020-12-23 16:49:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:29,795 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-23 16:49:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:49:29,795 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-23 16:49:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:29,796 INFO L225 Difference]: With dead ends: 34 [2020-12-23 16:49:29,796 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 16:49:29,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:49:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 16:49:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-23 16:49:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 16:49:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-23 16:49:29,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-12-23 16:49:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:29,800 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-23 16:49:29,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 16:49:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-23 16:49:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 16:49:29,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:29,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:30,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:30,017 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash -309577815, now seen corresponding path program 2 times [2020-12-23 16:49:30,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:30,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124204839] [2020-12-23 16:49:30,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:30,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124204839] [2020-12-23 16:49:30,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642941295] [2020-12-23 16:49:30,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:30,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:49:30,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:30,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 16:49:30,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:30,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:30,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 16:49:30,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122288069] [2020-12-23 16:49:30,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:49:30,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:49:30,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:49:30,411 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 16 states. [2020-12-23 16:49:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:30,663 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-23 16:49:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:49:30,663 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-12-23 16:49:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:30,664 INFO L225 Difference]: With dead ends: 30 [2020-12-23 16:49:30,664 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 16:49:30,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:49:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 16:49:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-23 16:49:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 16:49:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-23 16:49:30,667 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-12-23 16:49:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:30,668 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-23 16:49:30,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:49:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-23 16:49:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 16:49:30,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:30,669 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:30,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:30,877 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:30,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1540133135, now seen corresponding path program 3 times [2020-12-23 16:49:30,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:30,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94070389] [2020-12-23 16:49:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:31,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94070389] [2020-12-23 16:49:31,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528642171] [2020-12-23 16:49:31,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:31,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:49:31,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:31,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 16:49:31,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:31,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:31,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-23 16:49:31,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699495445] [2020-12-23 16:49:31,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 16:49:31,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:31,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 16:49:31,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:49:31,309 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2020-12-23 16:49:31,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:31,444 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-23 16:49:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:49:31,445 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-23 16:49:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:31,448 INFO L225 Difference]: With dead ends: 48 [2020-12-23 16:49:31,448 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 16:49:31,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:49:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 16:49:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-23 16:49:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 16:49:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-23 16:49:31,453 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-12-23 16:49:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:31,453 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-23 16:49:31,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 16:49:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-23 16:49:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 16:49:31,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:31,454 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:31,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:31,666 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:31,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:31,667 INFO L82 PathProgramCache]: Analyzing trace with hash 884722574, now seen corresponding path program 4 times [2020-12-23 16:49:31,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:31,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349827418] [2020-12-23 16:49:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:31,888 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 16:49:31,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349827418] [2020-12-23 16:49:31,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938192181] [2020-12-23 16:49:31,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:31,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:49:31,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:31,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:49:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:32,142 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 16:49:32,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:32,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-12-23 16:49:32,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062756106] [2020-12-23 16:49:32,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:49:32,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:32,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:49:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:49:32,145 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 19 states. [2020-12-23 16:49:32,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:32,571 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-23 16:49:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:49:32,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-12-23 16:49:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:32,572 INFO L225 Difference]: With dead ends: 39 [2020-12-23 16:49:32,572 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 16:49:32,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:49:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 16:49:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-23 16:49:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 16:49:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-23 16:49:32,576 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2020-12-23 16:49:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:32,576 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-23 16:49:32,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:49:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-23 16:49:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 16:49:32,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:32,577 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:32,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 16:49:32,783 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash -510819796, now seen corresponding path program 5 times [2020-12-23 16:49:32,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:32,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857417684] [2020-12-23 16:49:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:32,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857417684] [2020-12-23 16:49:32,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359490607] [2020-12-23 16:49:32,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:33,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 16:49:33,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:33,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:49:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:33,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:33,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-23 16:49:33,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448278643] [2020-12-23 16:49:33,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 16:49:33,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:33,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 16:49:33,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:49:33,256 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 14 states. [2020-12-23 16:49:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:33,470 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-23 16:49:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:49:33,470 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-12-23 16:49:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:33,471 INFO L225 Difference]: With dead ends: 62 [2020-12-23 16:49:33,471 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 16:49:33,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:49:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 16:49:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-23 16:49:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 16:49:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-23 16:49:33,475 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-12-23 16:49:33,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:33,475 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-23 16:49:33,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 16:49:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-23 16:49:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 16:49:33,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:33,477 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:33,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:33,692 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:33,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1615395281, now seen corresponding path program 6 times [2020-12-23 16:49:33,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:33,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572262528] [2020-12-23 16:49:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:33,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572262528] [2020-12-23 16:49:33,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349167556] [2020-12-23 16:49:33,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:49:34,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:49:34,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:34,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 16:49:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:34,167 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 16:49:34,167 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:34,175 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:34,177 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:34,178 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:34,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:34,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2020-12-23 16:49:34,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015033929] [2020-12-23 16:49:34,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:49:34,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:34,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:49:34,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:49:34,390 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2020-12-23 16:49:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:34,868 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-23 16:49:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:49:34,869 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-12-23 16:49:34,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:34,869 INFO L225 Difference]: With dead ends: 48 [2020-12-23 16:49:34,870 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 16:49:34,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:49:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 16:49:34,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-23 16:49:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:49:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-23 16:49:34,873 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2020-12-23 16:49:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:34,874 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-23 16:49:34,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:49:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-23 16:49:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 16:49:34,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:34,875 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:35,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:35,089 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash 658687019, now seen corresponding path program 7 times [2020-12-23 16:49:35,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:35,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377657521] [2020-12-23 16:49:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:35,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377657521] [2020-12-23 16:49:35,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598798914] [2020-12-23 16:49:35,313 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 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 16:49:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:35,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:49:35,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:35,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:35,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-12-23 16:49:35,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954784083] [2020-12-23 16:49:35,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:49:35,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:49:35,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:49:35,544 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 16 states. [2020-12-23 16:49:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:35,849 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-12-23 16:49:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:49:35,850 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-12-23 16:49:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:35,851 INFO L225 Difference]: With dead ends: 76 [2020-12-23 16:49:35,851 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 16:49:35,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:49:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 16:49:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-12-23 16:49:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 16:49:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-12-23 16:49:35,855 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2020-12-23 16:49:35,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:35,855 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-12-23 16:49:35,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:49:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-12-23 16:49:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 16:49:35,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:35,857 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:36,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 16:49:36,072 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash 40506248, now seen corresponding path program 8 times [2020-12-23 16:49:36,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:36,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124944777] [2020-12-23 16:49:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:36,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124944777] [2020-12-23 16:49:36,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606027828] [2020-12-23 16:49:36,347 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 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 16:49:36,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:49:36,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:36,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 16:49:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:36,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:36,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2020-12-23 16:49:36,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216803701] [2020-12-23 16:49:36,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:49:36,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:36,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:49:36,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:49:36,697 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 25 states. [2020-12-23 16:49:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:37,279 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-23 16:49:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:49:37,280 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-12-23 16:49:37,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:37,281 INFO L225 Difference]: With dead ends: 57 [2020-12-23 16:49:37,281 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 16:49:37,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:49:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 16:49:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-23 16:49:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 16:49:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-23 16:49:37,285 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 50 [2020-12-23 16:49:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:37,286 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-23 16:49:37,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:49:37,286 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-23 16:49:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 16:49:37,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:37,287 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:37,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 16:49:37,488 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:37,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1129260658, now seen corresponding path program 9 times [2020-12-23 16:49:37,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:37,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183607608] [2020-12-23 16:49:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:37,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183607608] [2020-12-23 16:49:37,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897034806] [2020-12-23 16:49:37,750 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 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 16:49:38,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 16:49:38,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 16:49:38,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:38,156 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 16:49:38,156 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:38,162 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:38,162 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:38,165 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:38,982 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 12 [2020-12-23 16:49:38,984 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:38,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:38,988 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:38,989 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2020-12-23 16:49:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:39,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:39,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 35 [2020-12-23 16:49:39,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478987392] [2020-12-23 16:49:39,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 16:49:39,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:39,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 16:49:39,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:49:39,065 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 35 states. [2020-12-23 16:49:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:40,958 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-12-23 16:49:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:49:40,959 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 55 [2020-12-23 16:49:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:40,960 INFO L225 Difference]: With dead ends: 90 [2020-12-23 16:49:40,960 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 16:49:40,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=277, Invalid=2693, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 16:49:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 16:49:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-12-23 16:49:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 16:49:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-23 16:49:40,967 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2020-12-23 16:49:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:40,967 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-23 16:49:40,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 16:49:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-23 16:49:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 16:49:40,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:40,968 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:41,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:49:41,182 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:41,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1822347189, now seen corresponding path program 10 times [2020-12-23 16:49:41,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:41,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414656975] [2020-12-23 16:49:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:41,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414656975] [2020-12-23 16:49:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543727373] [2020-12-23 16:49:41,507 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 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 16:49:41,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:49:41,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:41,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 16:49:41,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:41,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:41,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2020-12-23 16:49:41,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954062911] [2020-12-23 16:49:41,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:49:41,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:41,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:49:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:49:41,969 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 28 states. [2020-12-23 16:49:42,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:42,599 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-12-23 16:49:42,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:49:42,600 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-12-23 16:49:42,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:42,601 INFO L225 Difference]: With dead ends: 66 [2020-12-23 16:49:42,601 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 16:49:42,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:49:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 16:49:42,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-23 16:49:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 16:49:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-12-23 16:49:42,605 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2020-12-23 16:49:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:42,605 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-12-23 16:49:42,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:49:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-12-23 16:49:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 16:49:42,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:42,606 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:42,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:42,819 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash 897187429, now seen corresponding path program 11 times [2020-12-23 16:49:42,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:42,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864796128] [2020-12-23 16:49:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:43,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864796128] [2020-12-23 16:49:43,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297259983] [2020-12-23 16:49:43,129 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 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 16:49:43,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 16:49:43,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 16:49:43,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:43,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:43,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 16:49:43,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450321584] [2020-12-23 16:49:43,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:49:43,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:43,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:49:43,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:49:43,694 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 20 states. [2020-12-23 16:49:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:44,222 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-12-23 16:49:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:49:44,222 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-12-23 16:49:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:44,223 INFO L225 Difference]: With dead ends: 104 [2020-12-23 16:49:44,223 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 16:49:44,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:49:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 16:49:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-12-23 16:49:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 16:49:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-12-23 16:49:44,227 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2020-12-23 16:49:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:44,227 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-12-23 16:49:44,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:49:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-12-23 16:49:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 16:49:44,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:44,229 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:44,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:44,438 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:44,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:44,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2146504834, now seen corresponding path program 12 times [2020-12-23 16:49:44,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:44,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224264311] [2020-12-23 16:49:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 45 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:44,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224264311] [2020-12-23 16:49:44,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359444468] [2020-12-23 16:49:44,860 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 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 16:49:45,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 16:49:45,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:45,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 16:49:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:45,362 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 16:49:45,363 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:45,368 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:45,369 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:45,369 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 66 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:46,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:46,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2020-12-23 16:49:46,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895169896] [2020-12-23 16:49:46,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 16:49:46,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 16:49:46,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:49:46,131 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 38 states. [2020-12-23 16:49:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:47,784 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-12-23 16:49:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:49:47,785 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 68 [2020-12-23 16:49:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:47,786 INFO L225 Difference]: With dead ends: 75 [2020-12-23 16:49:47,786 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:49:47,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=573, Invalid=2289, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:49:47,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:49:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-23 16:49:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 16:49:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-23 16:49:47,790 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 68 [2020-12-23 16:49:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:47,791 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-23 16:49:47,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 16:49:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-23 16:49:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 16:49:47,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:47,792 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:48,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:48,002 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:48,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:48,003 INFO L82 PathProgramCache]: Analyzing trace with hash -111069768, now seen corresponding path program 13 times [2020-12-23 16:49:48,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:48,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229214456] [2020-12-23 16:49:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:48,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229214456] [2020-12-23 16:49:48,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468123314] [2020-12-23 16:49:48,401 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 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 16:49:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:48,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:49:48,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:48,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:48,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-23 16:49:48,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723355049] [2020-12-23 16:49:48,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:49:48,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:48,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:49:48,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:49:48,674 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 22 states. [2020-12-23 16:49:49,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:49,326 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-12-23 16:49:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 16:49:49,326 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-12-23 16:49:49,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:49,327 INFO L225 Difference]: With dead ends: 118 [2020-12-23 16:49:49,327 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 16:49:49,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:49:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 16:49:49,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-12-23 16:49:49,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 16:49:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-23 16:49:49,330 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-12-23 16:49:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:49,330 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-23 16:49:49,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:49:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-23 16:49:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 16:49:49,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:49,331 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:49,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 16:49:49,534 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:49,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:49,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1527788603, now seen corresponding path program 14 times [2020-12-23 16:49:49,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:49,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527109544] [2020-12-23 16:49:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:49,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527109544] [2020-12-23 16:49:49,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472420266] [2020-12-23 16:49:49,994 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 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 16:49:50,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:49:50,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:50,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 16:49:50,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 98 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:50,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:50,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2020-12-23 16:49:50,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884831434] [2020-12-23 16:49:50,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 16:49:50,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:50,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 16:49:50,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:49:50,506 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 34 states. [2020-12-23 16:49:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:51,599 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-12-23 16:49:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:49:51,600 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-12-23 16:49:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:51,601 INFO L225 Difference]: With dead ends: 84 [2020-12-23 16:49:51,602 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 16:49:51,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:49:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 16:49:51,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-23 16:49:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 16:49:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-12-23 16:49:51,605 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2020-12-23 16:49:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:51,605 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-12-23 16:49:51,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 16:49:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-12-23 16:49:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 16:49:51,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:51,606 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:51,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 16:49:51,815 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:51,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash 787512735, now seen corresponding path program 15 times [2020-12-23 16:49:51,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:51,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066041777] [2020-12-23 16:49:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:52,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066041777] [2020-12-23 16:49:52,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714699151] [2020-12-23 16:49:52,264 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 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 16:49:52,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 16:49:52,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:52,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 16:49:52,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:52,781 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 16:49:52,781 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:52,787 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:52,787 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:52,787 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:53,144 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 9 [2020-12-23 16:49:53,144 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:53,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:53,150 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:53,151 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2020-12-23 16:49:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:53,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:53,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2020-12-23 16:49:53,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289633901] [2020-12-23 16:49:53,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:49:53,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:53,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:49:53,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:49:53,311 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 32 states. [2020-12-23 16:49:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:54,248 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-12-23 16:49:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:49:54,249 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 82 [2020-12-23 16:49:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:54,250 INFO L225 Difference]: With dead ends: 132 [2020-12-23 16:49:54,250 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:49:54,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=1666, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:49:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:49:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-12-23 16:49:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 16:49:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-12-23 16:49:54,254 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2020-12-23 16:49:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:54,255 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-12-23 16:49:54,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:49:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-12-23 16:49:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 16:49:54,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:54,256 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:54,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 16:49:54,460 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1328274820, now seen corresponding path program 16 times [2020-12-23 16:49:54,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:54,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945020415] [2020-12-23 16:49:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 91 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:55,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945020415] [2020-12-23 16:49:55,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880810150] [2020-12-23 16:49:55,003 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 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 16:49:55,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:49:55,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:55,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-23 16:49:55,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:55,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:55,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 36 [2020-12-23 16:49:55,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053225873] [2020-12-23 16:49:55,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 16:49:55,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:55,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 16:49:55,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:49:55,675 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 37 states. [2020-12-23 16:49:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:56,930 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-12-23 16:49:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:49:56,931 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 86 [2020-12-23 16:49:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:56,932 INFO L225 Difference]: With dead ends: 93 [2020-12-23 16:49:56,932 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 16:49:56,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=519, Invalid=1931, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:49:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 16:49:56,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 16:49:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 16:49:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-12-23 16:49:56,940 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 86 [2020-12-23 16:49:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:56,940 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-12-23 16:49:56,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 16:49:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-12-23 16:49:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 16:49:56,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:56,942 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:57,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 16:49:57,155 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:57,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:57,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1956884482, now seen corresponding path program 17 times [2020-12-23 16:49:57,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:57,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484911548] [2020-12-23 16:49:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:57,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484911548] [2020-12-23 16:49:57,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482706126] [2020-12-23 16:49:57,710 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 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 16:49:58,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 16:49:58,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:58,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 16:49:58,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:58,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:58,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-12-23 16:49:58,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693094916] [2020-12-23 16:49:58,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:49:58,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:58,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:49:58,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:49:58,606 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 26 states. [2020-12-23 16:49:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:59,565 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2020-12-23 16:49:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:49:59,566 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2020-12-23 16:49:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:59,567 INFO L225 Difference]: With dead ends: 146 [2020-12-23 16:49:59,567 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 16:49:59,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:49:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 16:49:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-12-23 16:49:59,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 16:49:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-12-23 16:49:59,570 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2020-12-23 16:49:59,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:59,570 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-12-23 16:49:59,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:49:59,570 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-12-23 16:49:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 16:49:59,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:59,571 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:59,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 16:49:59,772 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:59,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:59,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1756877761, now seen corresponding path program 18 times [2020-12-23 16:49:59,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:59,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659518118] [2020-12-23 16:49:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:00,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659518118] [2020-12-23 16:50:00,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644757798] [2020-12-23 16:50:00,387 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 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 16:50:01,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 16:50:01,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-23 16:50:01,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:01,090 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 16:50:01,090 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:01,097 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:01,098 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:01,098 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:50:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 153 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:02,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:02,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2020-12-23 16:50:02,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64125289] [2020-12-23 16:50:02,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 16:50:02,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 16:50:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=2169, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:50:02,280 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 50 states. [2020-12-23 16:50:04,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:04,998 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-12-23 16:50:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 16:50:04,998 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 95 [2020-12-23 16:50:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:04,999 INFO L225 Difference]: With dead ends: 102 [2020-12-23 16:50:05,000 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 16:50:05,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1017, Invalid=4095, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 16:50:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 16:50:05,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-23 16:50:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 16:50:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-12-23 16:50:05,005 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2020-12-23 16:50:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:05,005 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-12-23 16:50:05,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 16:50:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-12-23 16:50:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 16:50:05,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:05,006 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:05,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:05,221 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash -924999207, now seen corresponding path program 19 times [2020-12-23 16:50:05,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:05,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34692717] [2020-12-23 16:50:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:05,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34692717] [2020-12-23 16:50:05,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084165428] [2020-12-23 16:50:05,873 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 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 16:50:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:06,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 16:50:06,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:06,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:06,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-12-23 16:50:06,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576682050] [2020-12-23 16:50:06,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:50:06,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:06,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:50:06,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:50:06,336 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 28 states. [2020-12-23 16:50:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:07,547 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2020-12-23 16:50:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:50:07,547 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 100 [2020-12-23 16:50:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:07,548 INFO L225 Difference]: With dead ends: 160 [2020-12-23 16:50:07,548 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 16:50:07,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:50:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 16:50:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-12-23 16:50:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 16:50:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-12-23 16:50:07,552 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2020-12-23 16:50:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:07,552 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-12-23 16:50:07,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:50:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-12-23 16:50:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 16:50:07,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:07,553 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:07,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 16:50:07,754 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:07,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1790355830, now seen corresponding path program 20 times [2020-12-23 16:50:07,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:07,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113191755] [2020-12-23 16:50:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 153 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:08,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113191755] [2020-12-23 16:50:08,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979752081] [2020-12-23 16:50:08,549 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 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 16:50:08,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:50:08,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 111 conjunts are in the unsatisfiable core [2020-12-23 16:50:08,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:08,682 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 16:50:08,684 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:08,691 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:08,692 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:08,692 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:50:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:10,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:10,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2020-12-23 16:50:10,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335117947] [2020-12-23 16:50:10,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 16:50:10,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:10,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 16:50:10,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2576, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:50:10,082 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 54 states. [2020-12-23 16:50:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:11,871 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-12-23 16:50:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:50:11,871 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 104 [2020-12-23 16:50:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:11,876 INFO L225 Difference]: With dead ends: 111 [2020-12-23 16:50:11,876 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 16:50:11,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=745, Invalid=3947, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 16:50:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 16:50:11,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-12-23 16:50:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 16:50:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-23 16:50:11,882 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2020-12-23 16:50:11,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:11,882 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-23 16:50:11,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 16:50:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-23 16:50:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-23 16:50:11,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:11,883 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:12,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:12,095 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:12,096 INFO L82 PathProgramCache]: Analyzing trace with hash 45684036, now seen corresponding path program 21 times [2020-12-23 16:50:12,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:12,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126328233] [2020-12-23 16:50:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:12,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126328233] [2020-12-23 16:50:12,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977257005] [2020-12-23 16:50:12,852 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 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 16:50:13,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 16:50:13,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:13,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 16:50:13,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:13,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:13,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-12-23 16:50:13,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472717241] [2020-12-23 16:50:13,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:50:13,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:50:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:50:13,805 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 30 states. [2020-12-23 16:50:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:15,140 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-12-23 16:50:15,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:50:15,140 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 109 [2020-12-23 16:50:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:15,141 INFO L225 Difference]: With dead ends: 174 [2020-12-23 16:50:15,141 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 16:50:15,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=1667, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:50:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 16:50:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2020-12-23 16:50:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-23 16:50:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-12-23 16:50:15,145 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 109 [2020-12-23 16:50:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:15,145 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-12-23 16:50:15,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:50:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-12-23 16:50:15,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-23 16:50:15,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:15,146 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:15,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 16:50:15,350 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:15,350 INFO L82 PathProgramCache]: Analyzing trace with hash 941772359, now seen corresponding path program 22 times [2020-12-23 16:50:15,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:15,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474421324] [2020-12-23 16:50:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 190 proven. 383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:16,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474421324] [2020-12-23 16:50:16,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019245588] [2020-12-23 16:50:16,133 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 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 16:50:16,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:50:16,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 117 conjunts are in the unsatisfiable core [2020-12-23 16:50:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:17,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:17,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 45 [2020-12-23 16:50:17,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288859239] [2020-12-23 16:50:17,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 16:50:17,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 16:50:17,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1778, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:50:17,043 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 46 states. [2020-12-23 16:50:18,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:18,889 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-12-23 16:50:18,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 16:50:18,889 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 113 [2020-12-23 16:50:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:18,891 INFO L225 Difference]: With dead ends: 120 [2020-12-23 16:50:18,891 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 16:50:18,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=801, Invalid=2981, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 16:50:18,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 16:50:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-12-23 16:50:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 16:50:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-12-23 16:50:18,896 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 113 [2020-12-23 16:50:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:18,896 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-12-23 16:50:18,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 16:50:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-12-23 16:50:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 16:50:18,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:18,897 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:19,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:19,108 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash 530107155, now seen corresponding path program 23 times [2020-12-23 16:50:19,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:19,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818431270] [2020-12-23 16:50:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:19,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818431270] [2020-12-23 16:50:19,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516853808] [2020-12-23 16:50:19,950 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 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 16:50:21,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 16:50:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:21,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 16:50:21,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:21,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:21,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2020-12-23 16:50:21,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788481046] [2020-12-23 16:50:21,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:50:21,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:21,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:50:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=926, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:50:21,564 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 32 states. [2020-12-23 16:50:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:23,204 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2020-12-23 16:50:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 16:50:23,204 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-23 16:50:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:23,206 INFO L225 Difference]: With dead ends: 188 [2020-12-23 16:50:23,206 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 16:50:23,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:50:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 16:50:23,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-12-23 16:50:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 16:50:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-12-23 16:50:23,209 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 118 [2020-12-23 16:50:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:23,210 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-12-23 16:50:23,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:50:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-12-23 16:50:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 16:50:23,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:23,211 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:23,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 16:50:23,416 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:23,417 INFO L82 PathProgramCache]: Analyzing trace with hash 660342128, now seen corresponding path program 24 times [2020-12-23 16:50:23,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:23,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063172507] [2020-12-23 16:50:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 231 proven. 448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063172507] [2020-12-23 16:50:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688718557] [2020-12-23 16:50:24,327 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 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 16:50:25,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-23 16:50:25,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-23 16:50:25,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:25,194 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 16:50:25,195 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:25,200 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:25,201 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:25,201 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:10, output treesize:3 [2020-12-23 16:50:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 288 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:26,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:26,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2020-12-23 16:50:26,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335566769] [2020-12-23 16:50:26,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 16:50:26,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 16:50:26,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=3254, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 16:50:26,686 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 62 states. [2020-12-23 16:50:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:30,066 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-12-23 16:50:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 16:50:30,067 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2020-12-23 16:50:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:30,068 INFO L225 Difference]: With dead ends: 129 [2020-12-23 16:50:30,068 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 16:50:30,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1678, Invalid=6332, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 16:50:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 16:50:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-12-23 16:50:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 16:50:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-12-23 16:50:30,072 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 122 [2020-12-23 16:50:30,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:30,073 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-12-23 16:50:30,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 16:50:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-12-23 16:50:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 16:50:30,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:30,074 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:30,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:30,275 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1490036106, now seen corresponding path program 25 times [2020-12-23 16:50:30,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:30,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781693701] [2020-12-23 16:50:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:31,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781693701] [2020-12-23 16:50:31,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392388983] [2020-12-23 16:50:31,227 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 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 16:50:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:31,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 16:50:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:31,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:31,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2020-12-23 16:50:31,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074853439] [2020-12-23 16:50:31,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 16:50:31,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 16:50:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:50:31,776 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 34 states. [2020-12-23 16:50:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:33,652 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-12-23 16:50:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 16:50:33,652 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 127 [2020-12-23 16:50:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:33,653 INFO L225 Difference]: With dead ends: 202 [2020-12-23 16:50:33,653 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 16:50:33,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 16:50:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 16:50:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-12-23 16:50:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 16:50:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-12-23 16:50:33,657 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 127 [2020-12-23 16:50:33,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:33,657 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-12-23 16:50:33,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 16:50:33,657 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-12-23 16:50:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 16:50:33,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:33,658 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:33,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 16:50:33,859 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:33,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1094958131, now seen corresponding path program 26 times [2020-12-23 16:50:33,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:33,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108201813] [2020-12-23 16:50:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 276 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:34,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108201813] [2020-12-23 16:50:34,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373915953] [2020-12-23 16:50:34,898 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 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 16:50:35,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:50:35,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:35,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 135 conjunts are in the unsatisfiable core [2020-12-23 16:50:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 338 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:35,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:35,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 51 [2020-12-23 16:50:35,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354972541] [2020-12-23 16:50:35,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 16:50:35,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:35,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 16:50:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2273, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 16:50:35,963 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 52 states. [2020-12-23 16:50:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:38,236 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-12-23 16:50:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 16:50:38,237 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 131 [2020-12-23 16:50:38,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:38,238 INFO L225 Difference]: With dead ends: 138 [2020-12-23 16:50:38,238 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 16:50:38,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1024, Invalid=3806, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 16:50:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 16:50:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-12-23 16:50:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 16:50:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2020-12-23 16:50:38,243 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2020-12-23 16:50:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:38,243 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2020-12-23 16:50:38,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 16:50:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2020-12-23 16:50:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 16:50:38,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:38,244 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:38,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:38,447 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:38,448 INFO L82 PathProgramCache]: Analyzing trace with hash -929474227, now seen corresponding path program 27 times [2020-12-23 16:50:38,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:38,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192403320] [2020-12-23 16:50:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:39,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192403320] [2020-12-23 16:50:39,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89814175] [2020-12-23 16:50:39,566 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 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 16:50:40,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 16:50:40,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:40,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 16:50:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:40,546 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 16:50:40,547 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:40,554 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:40,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:40,555 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:50:41,554 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 9 [2020-12-23 16:50:41,555 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:41,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:41,560 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:41,560 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2020-12-23 16:50:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:41,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:41,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 50 [2020-12-23 16:50:41,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864020904] [2020-12-23 16:50:41,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 16:50:41,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:41,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 16:50:41,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2334, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:50:41,832 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 50 states. [2020-12-23 16:50:44,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:44,210 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2020-12-23 16:50:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 16:50:44,213 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 136 [2020-12-23 16:50:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:44,214 INFO L225 Difference]: With dead ends: 216 [2020-12-23 16:50:44,214 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 16:50:44,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=218, Invalid=4204, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 16:50:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 16:50:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-12-23 16:50:44,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 16:50:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-12-23 16:50:44,218 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 136 [2020-12-23 16:50:44,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:44,218 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-12-23 16:50:44,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 16:50:44,218 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-12-23 16:50:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 16:50:44,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:44,219 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:44,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 16:50:44,424 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:44,425 INFO L82 PathProgramCache]: Analyzing trace with hash -693660054, now seen corresponding path program 28 times [2020-12-23 16:50:44,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:44,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227740464] [2020-12-23 16:50:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 325 proven. 593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:45,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227740464] [2020-12-23 16:50:45,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297736001] [2020-12-23 16:50:45,559 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:45,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:50:45,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:45,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 147 conjunts are in the unsatisfiable core [2020-12-23 16:50:45,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:45,792 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 16:50:45,793 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:45,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:45,801 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:45,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:50:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 378 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:48,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:48,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2020-12-23 16:50:48,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617225225] [2020-12-23 16:50:48,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 16:50:48,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:48,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 16:50:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=4358, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 16:50:48,133 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 70 states. [2020-12-23 16:50:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:51,010 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2020-12-23 16:50:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:50:51,011 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 140 [2020-12-23 16:50:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:51,012 INFO L225 Difference]: With dead ends: 147 [2020-12-23 16:50:51,012 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 16:50:51,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1207, Invalid=6625, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 16:50:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 16:50:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-12-23 16:50:51,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-23 16:50:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-12-23 16:50:51,017 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 140 [2020-12-23 16:50:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:51,017 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-12-23 16:50:51,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 16:50:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-12-23 16:50:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-23 16:50:51,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:51,018 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:51,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 16:50:51,226 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:51,227 INFO L82 PathProgramCache]: Analyzing trace with hash -455466800, now seen corresponding path program 29 times [2020-12-23 16:50:51,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:51,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098250471] [2020-12-23 16:50:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 30 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:52,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098250471] [2020-12-23 16:50:52,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209461760] [2020-12-23 16:50:52,452 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:54,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 16:50:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:54,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 195 conjunts are in the unsatisfiable core [2020-12-23 16:50:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:54,511 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 16:50:54,512 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:54,517 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:54,518 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:54,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:51:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 378 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:00,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:00,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 51] total 86 [2020-12-23 16:51:00,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498188339] [2020-12-23 16:51:00,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 16:51:00,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:00,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 16:51:00,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=7035, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 16:51:00,201 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 86 states. [2020-12-23 16:51:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:16,142 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2020-12-23 16:51:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-23 16:51:16,143 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 145 [2020-12-23 16:51:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:16,144 INFO L225 Difference]: With dead ends: 236 [2020-12-23 16:51:16,145 INFO L226 Difference]: Without dead ends: 159 [2020-12-23 16:51:16,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4120 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=2046, Invalid=27024, Unknown=0, NotChecked=0, Total=29070 [2020-12-23 16:51:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-23 16:51:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2020-12-23 16:51:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 16:51:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-12-23 16:51:16,157 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 145 [2020-12-23 16:51:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:16,158 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-12-23 16:51:16,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 16:51:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-12-23 16:51:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 16:51:16,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:16,159 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:16,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 16:51:16,380 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:51:16,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:16,381 INFO L82 PathProgramCache]: Analyzing trace with hash -461984633, now seen corresponding path program 30 times [2020-12-23 16:51:16,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:16,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872910188] [2020-12-23 16:51:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:17,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872910188] [2020-12-23 16:51:17,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232347195] [2020-12-23 16:51:17,862 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:20,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 16:51:20,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:20,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 16:51:20,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:20,555 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 16:51:20,557 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:20,562 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:20,563 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:20,563 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:51:21,935 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 9 [2020-12-23 16:51:21,936 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:21,942 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:21,942 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:21,943 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2020-12-23 16:51:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:22,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:22,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 56 [2020-12-23 16:51:22,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294163342] [2020-12-23 16:51:22,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 16:51:22,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:22,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 16:51:22,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2950, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 16:51:22,285 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 56 states. [2020-12-23 16:51:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:25,310 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2020-12-23 16:51:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 16:51:25,311 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 154 [2020-12-23 16:51:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:25,312 INFO L225 Difference]: With dead ends: 244 [2020-12-23 16:51:25,312 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 16:51:25,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=244, Invalid=5306, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 16:51:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 16:51:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-12-23 16:51:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 16:51:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-12-23 16:51:25,317 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2020-12-23 16:51:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:25,318 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-12-23 16:51:25,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 16:51:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-12-23 16:51:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 16:51:25,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:25,319 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:25,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 16:51:25,527 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:51:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1331905436, now seen corresponding path program 31 times [2020-12-23 16:51:25,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:25,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98512965] [2020-12-23 16:51:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 435 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:27,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98512965] [2020-12-23 16:51:27,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747102941] [2020-12-23 16:51:27,044 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:27,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 162 conjunts are in the unsatisfiable core [2020-12-23 16:51:27,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 512 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:28,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:28,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 60 [2020-12-23 16:51:28,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490794354] [2020-12-23 16:51:28,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 16:51:28,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:28,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 16:51:28,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=3128, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 16:51:28,601 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 61 states. [2020-12-23 16:51:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:32,085 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-12-23 16:51:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 16:51:32,086 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 158 [2020-12-23 16:51:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:32,087 INFO L225 Difference]: With dead ends: 165 [2020-12-23 16:51:32,087 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 16:51:32,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1411, Invalid=5231, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 16:51:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 16:51:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-12-23 16:51:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 16:51:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2020-12-23 16:51:32,091 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 158 [2020-12-23 16:51:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:32,092 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2020-12-23 16:51:32,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 16:51:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2020-12-23 16:51:32,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-23 16:51:32,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:32,093 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:32,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 16:51:32,307 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:51:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:32,308 INFO L82 PathProgramCache]: Analyzing trace with hash -907041002, now seen corresponding path program 32 times [2020-12-23 16:51:32,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:32,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332667583] [2020-12-23 16:51:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:34,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332667583] [2020-12-23 16:51:34,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455661645] [2020-12-23 16:51:34,015 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:34,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:51:34,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 16:51:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:35,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:35,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2020-12-23 16:51:35,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91482822] [2020-12-23 16:51:35,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 16:51:35,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 16:51:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 16:51:35,071 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 42 states. [2020-12-23 16:51:38,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:38,374 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2020-12-23 16:51:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 16:51:38,374 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 163 [2020-12-23 16:51:38,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:38,376 INFO L225 Difference]: With dead ends: 258 [2020-12-23 16:51:38,376 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 16:51:38,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=199, Invalid=3461, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 16:51:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 16:51:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-12-23 16:51:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-23 16:51:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-12-23 16:51:38,380 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2020-12-23 16:51:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:38,381 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-12-23 16:51:38,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 16:51:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-12-23 16:51:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-23 16:51:38,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:38,382 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:38,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 16:51:38,597 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:51:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:38,598 INFO L82 PathProgramCache]: Analyzing trace with hash 2039554009, now seen corresponding path program 33 times [2020-12-23 16:51:38,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:38,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348033546] [2020-12-23 16:51:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 496 proven. 848 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:40,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348033546] [2020-12-23 16:51:40,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590253724] [2020-12-23 16:51:40,281 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:44,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 16:51:44,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:44,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 201 conjunts are in the unsatisfiable core [2020-12-23 16:51:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:44,446 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 16:51:44,447 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:44,452 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:44,453 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:44,453 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:51:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-12-23 16:51:49,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:49,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2020-12-23 16:51:49,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649209684] [2020-12-23 16:51:49,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 16:51:49,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:49,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 16:51:49,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=6323, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 16:51:49,124 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 82 states. [2020-12-23 16:52:00,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:00,796 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-12-23 16:52:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 16:52:00,797 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 167 [2020-12-23 16:52:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:00,798 INFO L225 Difference]: With dead ends: 174 [2020-12-23 16:52:00,798 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 16:52:00,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1412, Invalid=13840, Unknown=0, NotChecked=0, Total=15252 [2020-12-23 16:52:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 16:52:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-12-23 16:52:00,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 16:52:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2020-12-23 16:52:00,802 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 167 [2020-12-23 16:52:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:00,803 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2020-12-23 16:52:00,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 16:52:00,803 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2020-12-23 16:52:00,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-23 16:52:00,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:00,804 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:01,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 16:52:01,011 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:52:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:01,012 INFO L82 PathProgramCache]: Analyzing trace with hash 820520129, now seen corresponding path program 34 times [2020-12-23 16:52:01,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:01,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427791975] [2020-12-23 16:52:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 36 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:02,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427791975] [2020-12-23 16:52:02,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457074964] [2020-12-23 16:52:02,937 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:03,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:52:03,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:03,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 16:52:03,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:03,739 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 16:52:03,740 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:03,748 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:03,749 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:03,749 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:52:05,546 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 9 [2020-12-23 16:52:05,548 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:05,553 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:05,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:05,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2020-12-23 16:52:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 36 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:05,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:05,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 62 [2020-12-23 16:52:05,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980150616] [2020-12-23 16:52:05,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 16:52:05,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:05,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 16:52:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=3638, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 16:52:05,957 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 62 states. [2020-12-23 16:52:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:10,193 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-12-23 16:52:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 16:52:10,194 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 172 [2020-12-23 16:52:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:10,197 INFO L225 Difference]: With dead ends: 272 [2020-12-23 16:52:10,197 INFO L226 Difference]: Without dead ends: 180 [2020-12-23 16:52:10,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=270, Invalid=6536, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 16:52:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-23 16:52:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-12-23 16:52:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 16:52:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2020-12-23 16:52:10,202 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 172 [2020-12-23 16:52:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:10,202 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2020-12-23 16:52:10,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 16:52:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2020-12-23 16:52:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 16:52:10,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:10,204 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:10,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:10,418 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:52:10,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:10,418 INFO L82 PathProgramCache]: Analyzing trace with hash 123656030, now seen corresponding path program 35 times [2020-12-23 16:52:10,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:10,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666776236] [2020-12-23 16:52:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 561 proven. 943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:12,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666776236] [2020-12-23 16:52:12,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891883655] [2020-12-23 16:52:12,347 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:16,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-23 16:52:16,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:16,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 188 conjunts are in the unsatisfiable core [2020-12-23 16:52:16,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:16,741 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 16:52:16,742 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:16,751 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:16,751 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:16,752 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:52:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 630 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:18,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:18,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2020-12-23 16:52:18,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011826909] [2020-12-23 16:52:18,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 16:52:18,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:18,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 16:52:18,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=3840, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 16:52:18,834 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 65 states. [2020-12-23 16:52:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:24,065 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2020-12-23 16:52:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 16:52:24,066 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 176 [2020-12-23 16:52:24,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:24,068 INFO L225 Difference]: With dead ends: 183 [2020-12-23 16:52:24,068 INFO L226 Difference]: Without dead ends: 183 [2020-12-23 16:52:24,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=957, Invalid=6699, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 16:52:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-23 16:52:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2020-12-23 16:52:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 16:52:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2020-12-23 16:52:24,074 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 176 [2020-12-23 16:52:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:24,074 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2020-12-23 16:52:24,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 16:52:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2020-12-23 16:52:24,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 16:52:24,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:24,075 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:24,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:24,282 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:52:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1695111260, now seen corresponding path program 36 times [2020-12-23 16:52:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:24,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065648785] [2020-12-23 16:52:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 38 proven. 1558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:26,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065648785] [2020-12-23 16:52:26,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393743814] [2020-12-23 16:52:26,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:35,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-23 16:52:35,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:35,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 194 conjunts are in the unsatisfiable core [2020-12-23 16:52:35,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:35,487 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 16:52:35,488 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:35,495 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:35,496 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:35,496 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:52:44,849 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 12 [2020-12-23 16:52:44,852 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:44,856 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:44,857 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:44,858 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:7 [2020-12-23 16:52:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 38 proven. 1558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:45,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:45,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 64] total 105 [2020-12-23 16:52:45,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760144415] [2020-12-23 16:52:45,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-12-23 16:52:45,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-12-23 16:52:45,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=10503, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 16:52:45,153 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 105 states. [2020-12-23 16:53:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:04,217 INFO L93 Difference]: Finished difference Result 286 states and 288 transitions. [2020-12-23 16:53:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 16:53:04,219 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 181 [2020-12-23 16:53:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:04,220 INFO L225 Difference]: With dead ends: 286 [2020-12-23 16:53:04,220 INFO L226 Difference]: Without dead ends: 189 [2020-12-23 16:53:04,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4150 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=1145, Invalid=26577, Unknown=0, NotChecked=0, Total=27722 [2020-12-23 16:53:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-23 16:53:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2020-12-23 16:53:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 16:53:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2020-12-23 16:53:04,226 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 181 [2020-12-23 16:53:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:04,227 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2020-12-23 16:53:04,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-12-23 16:53:04,227 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2020-12-23 16:53:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-23 16:53:04,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:04,228 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:04,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:04,440 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:04,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:04,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1426409055, now seen corresponding path program 37 times [2020-12-23 16:53:04,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:04,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364854106] [2020-12-23 16:53:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 630 proven. 1043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:06,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364854106] [2020-12-23 16:53:06,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403429650] [2020-12-23 16:53:06,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:07,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 189 conjunts are in the unsatisfiable core [2020-12-23 16:53:07,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 722 proven. 951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:09,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:09,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 69 [2020-12-23 16:53:09,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096581307] [2020-12-23 16:53:09,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 16:53:09,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:09,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 16:53:09,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=4118, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 16:53:09,190 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 70 states. [2020-12-23 16:53:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:14,622 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-12-23 16:53:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 16:53:14,624 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 185 [2020-12-23 16:53:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:14,625 INFO L225 Difference]: With dead ends: 192 [2020-12-23 16:53:14,625 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 16:53:14,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1861, Invalid=6881, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 16:53:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 16:53:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2020-12-23 16:53:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 16:53:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2020-12-23 16:53:14,631 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 185 [2020-12-23 16:53:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:14,631 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2020-12-23 16:53:14,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 16:53:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2020-12-23 16:53:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-23 16:53:14,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:14,633 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:14,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 16:53:14,847 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:14,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:14,848 INFO L82 PathProgramCache]: Analyzing trace with hash 449126907, now seen corresponding path program 38 times [2020-12-23 16:53:14,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:14,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101948055] [2020-12-23 16:53:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 40 proven. 1730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:17,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101948055] [2020-12-23 16:53:17,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397479185] [2020-12-23 16:53:17,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:18,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:18,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:18,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 16:53:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 40 proven. 1730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:19,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:19,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 48 [2020-12-23 16:53:19,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165972111] [2020-12-23 16:53:19,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 16:53:19,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:19,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 16:53:19,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:53:19,144 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 48 states. [2020-12-23 16:53:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:24,327 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2020-12-23 16:53:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 16:53:24,328 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 190 [2020-12-23 16:53:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:24,329 INFO L225 Difference]: With dead ends: 300 [2020-12-23 16:53:24,329 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 16:53:24,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=229, Invalid=4601, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 16:53:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 16:53:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2020-12-23 16:53:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 16:53:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2020-12-23 16:53:24,333 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 190 [2020-12-23 16:53:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:24,333 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2020-12-23 16:53:24,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 16:53:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2020-12-23 16:53:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 16:53:24,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:24,334 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:24,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:24,535 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:24,536 INFO L82 PathProgramCache]: Analyzing trace with hash 422659928, now seen corresponding path program 39 times [2020-12-23 16:53:24,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:24,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411860889] [2020-12-23 16:53:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 703 proven. 1148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:26,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411860889] [2020-12-23 16:53:26,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426231015] [2020-12-23 16:53:26,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true