/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/strreplace-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:54:22,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:54:22,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:54:22,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:54:22,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:54:22,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:54:22,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:54:22,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:54:22,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:54:22,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:54:22,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:54:22,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:54:22,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:54:22,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:54:22,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:54:22,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:54:22,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:54:22,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:54:22,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:54:22,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:54:22,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:54:22,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:54:22,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:54:22,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:54:22,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:54:22,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:54:22,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:54:22,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:54:22,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:54:22,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:54:22,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:54:22,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:54:22,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:54:22,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:54:22,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:54:22,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:54:22,473 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 16:54:22,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:54:22,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:54:22,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:54:22,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:54:22,516 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:54:22,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:54:22,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:54:22,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:54:22,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:54:22,517 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:54:22,518 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:54:22,518 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:54:22,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:54:22,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:54:22,518 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:54:22,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:54:22,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:54:22,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:54:22,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:54:22,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:54:22,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:54:22,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:54:22,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:54:22,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:54:22,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:54:22,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:54:22,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:54:22,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:54:22,922 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:54:22,922 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:54:22,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-12-23 16:54:23,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c87656aa/d80f8a2cb4e14fea85876d99498032c0/FLAG1427b8e52 [2020-12-23 16:54:23,665 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:54:23,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-12-23 16:54:23,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c87656aa/d80f8a2cb4e14fea85876d99498032c0/FLAG1427b8e52 [2020-12-23 16:54:23,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c87656aa/d80f8a2cb4e14fea85876d99498032c0 [2020-12-23 16:54:23,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:54:23,978 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:54:23,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:54:23,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:54:23,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:54:23,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:54:23" (1/1) ... [2020-12-23 16:54:23,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382f1400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:23, skipping insertion in model container [2020-12-23 16:54:23,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:54:23" (1/1) ... [2020-12-23 16:54:24,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:54:24,076 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: IdentifierExpression[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IntegerLiteral[1]]]]] [2020-12-23 16:54:24,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:54:24,486 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: IdentifierExpression[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IntegerLiteral[1]]]]] [2020-12-23 16:54:24,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:54:24,588 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:54:24,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24 WrapperNode [2020-12-23 16:54:24,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:54:24,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:54:24,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:54:24,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:54:24,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (1/1) ... [2020-12-23 16:54:24,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (1/1) ... [2020-12-23 16:54:24,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:54:24,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:54:24,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:54:24,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:54:24,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (1/1) ... [2020-12-23 16:54:24,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (1/1) ... [2020-12-23 16:54:24,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (1/1) ... [2020-12-23 16:54:24,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (1/1) ... [2020-12-23 16:54:24,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (1/1) ... [2020-12-23 16:54:24,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (1/1) ... [2020-12-23 16:54:24,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (1/1) ... [2020-12-23 16:54:24,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:54:24,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:54:24,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:54:24,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:54:24,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (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 16:54:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:54:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:54:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:54:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:54:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:54:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:54:25,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:54:25,264 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 16:54:25,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:54:25 BoogieIcfgContainer [2020-12-23 16:54:25,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:54:25,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:54:25,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:54:25,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:54:25,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:54:23" (1/3) ... [2020-12-23 16:54:25,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25184e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:54:25, skipping insertion in model container [2020-12-23 16:54:25,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:24" (2/3) ... [2020-12-23 16:54:25,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25184e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:54:25, skipping insertion in model container [2020-12-23 16:54:25,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:54:25" (3/3) ... [2020-12-23 16:54:25,289 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2020-12-23 16:54:25,304 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:54:25,313 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-12-23 16:54:25,337 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-12-23 16:54:25,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:54:25,374 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:54:25,375 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:54:25,375 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:54:25,375 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:54:25,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:54:25,377 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:54:25,378 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:54:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-23 16:54:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:54:25,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:25,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:54:25,406 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2020-12-23 16:54:25,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:25,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34902561] [2020-12-23 16:54:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:25,618 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 16:54:25,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34902561] [2020-12-23 16:54:25,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:25,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:54:25,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883310384] [2020-12-23 16:54:25,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:54:25,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:25,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:54:25,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:54:25,646 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-12-23 16:54:25,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:25,703 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-23 16:54:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:54:25,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:54:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:25,719 INFO L225 Difference]: With dead ends: 58 [2020-12-23 16:54:25,719 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 16:54:25,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:54:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 16:54:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2020-12-23 16:54:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 16:54:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-23 16:54:25,771 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2020-12-23 16:54:25,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:25,771 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-23 16:54:25,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:54:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-23 16:54:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:54:25,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:25,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:54:25,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:54:25,774 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:25,777 INFO L82 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2020-12-23 16:54:25,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:25,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071389917] [2020-12-23 16:54:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:25,876 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 16:54:25,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071389917] [2020-12-23 16:54:25,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:25,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:54:25,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489343932] [2020-12-23 16:54:25,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:54:25,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:54:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:54:25,880 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 3 states. [2020-12-23 16:54:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:25,917 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-23 16:54:25,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:54:25,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 16:54:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:25,919 INFO L225 Difference]: With dead ends: 31 [2020-12-23 16:54:25,919 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 16:54:25,920 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 16:54:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 16:54:25,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 16:54:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 16:54:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-23 16:54:25,925 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2020-12-23 16:54:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:25,925 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-23 16:54:25,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:54:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-23 16:54:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:54:25,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:25,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:54:25,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:54:25,927 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:25,927 INFO L82 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2020-12-23 16:54:25,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:25,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572196707] [2020-12-23 16:54:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:26,021 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 16:54:26,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572196707] [2020-12-23 16:54:26,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:26,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:54:26,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399445583] [2020-12-23 16:54:26,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:54:26,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:26,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:54:26,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:54:26,024 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2020-12-23 16:54:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:26,070 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-23 16:54:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:54:26,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:54:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:26,072 INFO L225 Difference]: With dead ends: 50 [2020-12-23 16:54:26,072 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 16:54:26,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:54:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 16:54:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2020-12-23 16:54:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 16:54:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 16:54:26,080 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 6 [2020-12-23 16:54:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:26,081 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 16:54:26,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:54:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 16:54:26,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:54:26,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:26,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:54:26,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:54:26,085 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:26,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:26,086 INFO L82 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2020-12-23 16:54:26,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:26,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263421525] [2020-12-23 16:54:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:26,195 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 16:54:26,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263421525] [2020-12-23 16:54:26,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:26,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:54:26,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641224274] [2020-12-23 16:54:26,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:54:26,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:26,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:54:26,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:54:26,198 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 4 states. [2020-12-23 16:54:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:26,310 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-12-23 16:54:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:54:26,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:54:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:26,313 INFO L225 Difference]: With dead ends: 56 [2020-12-23 16:54:26,313 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 16:54:26,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:54:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 16:54:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2020-12-23 16:54:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 16:54:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-12-23 16:54:26,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2020-12-23 16:54:26,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:26,323 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-12-23 16:54:26,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:54:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-12-23 16:54:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:54:26,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:26,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:54:26,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:54:26,325 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:26,327 INFO L82 PathProgramCache]: Analyzing trace with hash 889568403, now seen corresponding path program 1 times [2020-12-23 16:54:26,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:26,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933318017] [2020-12-23 16:54:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:26,385 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 16:54:26,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933318017] [2020-12-23 16:54:26,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:26,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:54:26,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002080761] [2020-12-23 16:54:26,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:54:26,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:54:26,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:54:26,389 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2020-12-23 16:54:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:26,434 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-12-23 16:54:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:54:26,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:54:26,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:26,435 INFO L225 Difference]: With dead ends: 33 [2020-12-23 16:54:26,436 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 16:54:26,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:54:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 16:54:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-23 16:54:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 16:54:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 16:54:26,441 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2020-12-23 16:54:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:26,442 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 16:54:26,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:54:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 16:54:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:54:26,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:26,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:26,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:54:26,444 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2020-12-23 16:54:26,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:26,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753096812] [2020-12-23 16:54:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:26,502 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 16:54:26,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753096812] [2020-12-23 16:54:26,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:26,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:54:26,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091094932] [2020-12-23 16:54:26,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:54:26,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:54:26,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:54:26,509 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2020-12-23 16:54:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:26,617 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-23 16:54:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:54:26,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 16:54:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:26,620 INFO L225 Difference]: With dead ends: 29 [2020-12-23 16:54:26,620 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 16:54:26,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:54:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 16:54:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 16:54:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 16:54:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-23 16:54:26,632 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2020-12-23 16:54:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:26,632 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-23 16:54:26,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:54:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-23 16:54:26,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:54:26,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:26,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:26,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:54:26,635 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:26,636 INFO L82 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2020-12-23 16:54:26,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:26,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824785250] [2020-12-23 16:54:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:26,771 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 16:54:26,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824785250] [2020-12-23 16:54:26,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:26,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:54:26,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416212540] [2020-12-23 16:54:26,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:54:26,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:54:26,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:54:26,775 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-12-23 16:54:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:26,898 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-23 16:54:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:54:26,899 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 16:54:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:26,900 INFO L225 Difference]: With dead ends: 40 [2020-12-23 16:54:26,900 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 16:54:26,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:54:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 16:54:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-12-23 16:54:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 16:54:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-23 16:54:26,905 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 8 [2020-12-23 16:54:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:26,906 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-23 16:54:26,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:54:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-23 16:54:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:54:26,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:26,907 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:26,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:54:26,908 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:26,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2020-12-23 16:54:26,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:26,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265484133] [2020-12-23 16:54:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:27,035 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 16:54:27,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265484133] [2020-12-23 16:54:27,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128351714] [2020-12-23 16:54:27,037 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 16:54:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:27,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:54:27,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:27,184 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 16:54:27,185 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:27,195 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:27,197 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:27,197 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:54:27,252 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 16:54:27,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:27,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:54:27,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111992997] [2020-12-23 16:54:27,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:54:27,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:27,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:54:27,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:54:27,255 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-12-23 16:54:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:27,378 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-12-23 16:54:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:54:27,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 16:54:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:27,380 INFO L225 Difference]: With dead ends: 56 [2020-12-23 16:54:27,380 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 16:54:27,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:54:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 16:54:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 31. [2020-12-23 16:54:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 16:54:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 16:54:27,385 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2020-12-23 16:54:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:27,385 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 16:54:27,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:54:27,386 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 16:54:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 16:54:27,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:27,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:27,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 16:54:27,601 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:27,603 INFO L82 PathProgramCache]: Analyzing trace with hash -204531026, now seen corresponding path program 1 times [2020-12-23 16:54:27,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:27,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58548717] [2020-12-23 16:54:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:27,723 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 16:54:27,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58548717] [2020-12-23 16:54:27,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:27,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:54:27,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015265280] [2020-12-23 16:54:27,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:54:27,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:27,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:54:27,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:54:27,726 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2020-12-23 16:54:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:27,755 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-12-23 16:54:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:54:27,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 16:54:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:27,756 INFO L225 Difference]: With dead ends: 30 [2020-12-23 16:54:27,756 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 16:54:27,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:54:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 16:54:27,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 16:54:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 16:54:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 16:54:27,760 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2020-12-23 16:54:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:27,760 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 16:54:27,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:54:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 16:54:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:54:27,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:27,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:27,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 16:54:27,762 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:27,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:27,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2044161814, now seen corresponding path program 1 times [2020-12-23 16:54:27,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:27,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725339325] [2020-12-23 16:54:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:27,877 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 16:54:27,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725339325] [2020-12-23 16:54:27,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:27,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:54:27,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716069882] [2020-12-23 16:54:27,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:54:27,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:27,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:54:27,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:54:27,884 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-12-23 16:54:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:27,995 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-23 16:54:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:54:27,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 16:54:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:27,997 INFO L225 Difference]: With dead ends: 31 [2020-12-23 16:54:27,997 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 16:54:27,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:54:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 16:54:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 16:54:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 16:54:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 16:54:28,007 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2020-12-23 16:54:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:28,008 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 16:54:28,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:54:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 16:54:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:54:28,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:28,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:28,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:54:28,009 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1343097236, now seen corresponding path program 1 times [2020-12-23 16:54:28,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:28,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987345931] [2020-12-23 16:54:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:28,138 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 16:54:28,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987345931] [2020-12-23 16:54:28,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:28,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 16:54:28,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476888035] [2020-12-23 16:54:28,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:54:28,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:28,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:54:28,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:54:28,141 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 8 states. [2020-12-23 16:54:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:28,268 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-23 16:54:28,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:54:28,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 16:54:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:28,269 INFO L225 Difference]: With dead ends: 33 [2020-12-23 16:54:28,269 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 16:54:28,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:54:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 16:54:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-12-23 16:54:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 16:54:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-23 16:54:28,272 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2020-12-23 16:54:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:28,272 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-23 16:54:28,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:54:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-23 16:54:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:54:28,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:28,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:28,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 16:54:28,274 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:28,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:28,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1914076215, now seen corresponding path program 1 times [2020-12-23 16:54:28,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:28,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075044072] [2020-12-23 16:54:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:28,406 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 16:54:28,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075044072] [2020-12-23 16:54:28,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850691315] [2020-12-23 16:54:28,407 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 16:54:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:28,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:54:28,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:28,595 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 16:54:28,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:28,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 16:54:28,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558251780] [2020-12-23 16:54:28,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:54:28,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:28,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:54:28,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:54:28,598 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 13 states. [2020-12-23 16:54:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:28,765 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-12-23 16:54:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:54:28,765 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 16:54:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:28,766 INFO L225 Difference]: With dead ends: 38 [2020-12-23 16:54:28,766 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 16:54:28,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:54:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 16:54:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-12-23 16:54:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 16:54:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 16:54:28,770 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 17 [2020-12-23 16:54:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:28,770 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 16:54:28,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:54:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 16:54:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:54:28,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:28,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:28,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 16:54:28,988 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:28,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1668744869, now seen corresponding path program 2 times [2020-12-23 16:54:28,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:28,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497661741] [2020-12-23 16:54:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:29,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497661741] [2020-12-23 16:54:29,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397398417] [2020-12-23 16:54:29,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:29,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:54:29,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 16:54:29,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:29,433 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:54:29,434 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,441 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,445 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:29,445 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:54:29,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:29,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:29,787 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,787 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2020-12-23 16:54:29,790 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:54:29,804 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:54:29,812 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 16:54:29,816 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,816 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:27 [2020-12-23 16:54:29,931 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 16:54:29,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:29,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-12-23 16:54:29,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187149426] [2020-12-23 16:54:29,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:54:29,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:54:29,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:54:29,934 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 20 states. [2020-12-23 16:54:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:31,453 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-12-23 16:54:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:54:31,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-23 16:54:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:31,455 INFO L225 Difference]: With dead ends: 85 [2020-12-23 16:54:31,455 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 16:54:31,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 16:54:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 16:54:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 42. [2020-12-23 16:54:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 16:54:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-23 16:54:31,460 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2020-12-23 16:54:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:31,461 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-23 16:54:31,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:54:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-23 16:54:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 16:54:31,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:31,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:31,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 16:54:31,677 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash -938115935, now seen corresponding path program 1 times [2020-12-23 16:54:31,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:31,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103532813] [2020-12-23 16:54:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:31,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103532813] [2020-12-23 16:54:31,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879252845] [2020-12-23 16:54:31,849 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 16:54:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 16:54:31,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:32,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:32,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-12-23 16:54:32,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610576873] [2020-12-23 16:54:32,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:54:32,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:54:32,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:54:32,080 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 15 states. [2020-12-23 16:54:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:32,320 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-12-23 16:54:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:54:32,321 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-23 16:54:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:32,322 INFO L225 Difference]: With dead ends: 59 [2020-12-23 16:54:32,322 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 16:54:32,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:54:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 16:54:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2020-12-23 16:54:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 16:54:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-12-23 16:54:32,326 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 28 [2020-12-23 16:54:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:32,326 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-12-23 16:54:32,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:54:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-12-23 16:54:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 16:54:32,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:32,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:32,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:32,541 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1721723482, now seen corresponding path program 3 times [2020-12-23 16:54:32,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:32,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813318126] [2020-12-23 16:54:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:32,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813318126] [2020-12-23 16:54:32,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744749871] [2020-12-23 16:54:32,743 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 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 16:54:32,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:54:32,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:32,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 16:54:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:32,942 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:54:32,944 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:32,950 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:32,953 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:32,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:54:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:33,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:33,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-12-23 16:54:33,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686797614] [2020-12-23 16:54:33,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:54:33,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:33,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:54:33,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:54:33,119 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 20 states. [2020-12-23 16:54:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:33,601 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-12-23 16:54:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:54:33,602 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-12-23 16:54:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:33,602 INFO L225 Difference]: With dead ends: 72 [2020-12-23 16:54:33,602 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 16:54:33,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:54:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 16:54:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-12-23 16:54:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 16:54:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-23 16:54:33,613 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 31 [2020-12-23 16:54:33,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:33,615 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-23 16:54:33,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:54:33,615 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-23 16:54:33,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 16:54:33,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:33,619 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:33,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 16:54:33,834 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:33,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:33,836 INFO L82 PathProgramCache]: Analyzing trace with hash 374629827, now seen corresponding path program 4 times [2020-12-23 16:54:33,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:33,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540966550] [2020-12-23 16:54:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:33,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540966550] [2020-12-23 16:54:33,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868127796] [2020-12-23 16:54:33,988 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 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 16:54:34,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:54:34,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 16:54:34,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:34,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:34,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-12-23 16:54:34,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409383120] [2020-12-23 16:54:34,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 16:54:34,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:34,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 16:54:34,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:54:34,262 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 18 states. [2020-12-23 16:54:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:34,580 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-12-23 16:54:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:54:34,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-12-23 16:54:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:34,581 INFO L225 Difference]: With dead ends: 57 [2020-12-23 16:54:34,581 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 16:54:34,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:54:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 16:54:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-12-23 16:54:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 16:54:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-12-23 16:54:34,585 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 35 [2020-12-23 16:54:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:34,585 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-12-23 16:54:34,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 16:54:34,585 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-12-23 16:54:34,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 16:54:34,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:34,587 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:34,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:34,801 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:34,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1667122081, now seen corresponding path program 5 times [2020-12-23 16:54:34,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:34,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664237957] [2020-12-23 16:54:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:35,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664237957] [2020-12-23 16:54:35,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827499001] [2020-12-23 16:54:35,028 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 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 16:54:35,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 16:54:35,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:35,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 16:54:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:35,264 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:54:35,265 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:35,271 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:35,274 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:35,275 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:54:35,413 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:54:35,415 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:35,416 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:35,417 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:35,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:54:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:35,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:35,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-12-23 16:54:35,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613972188] [2020-12-23 16:54:35,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:54:35,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:54:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:54:35,426 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 22 states. [2020-12-23 16:54:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:36,160 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2020-12-23 16:54:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:54:36,160 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2020-12-23 16:54:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:36,161 INFO L225 Difference]: With dead ends: 96 [2020-12-23 16:54:36,161 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 16:54:36,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:54:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 16:54:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-12-23 16:54:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 16:54:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-12-23 16:54:36,165 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 40 [2020-12-23 16:54:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:36,166 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-12-23 16:54:36,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:54:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-12-23 16:54:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 16:54:36,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:36,167 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:36,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:54:36,377 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash 537281572, now seen corresponding path program 6 times [2020-12-23 16:54:36,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:36,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480690510] [2020-12-23 16:54:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:36,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480690510] [2020-12-23 16:54:36,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305171788] [2020-12-23 16:54:36,615 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 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 16:54:36,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:54:36,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 16:54:36,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:37,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:37,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2020-12-23 16:54:37,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650417529] [2020-12-23 16:54:37,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:54:37,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:54:37,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:54:37,054 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 25 states. [2020-12-23 16:54:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:37,572 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-12-23 16:54:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:54:37,573 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2020-12-23 16:54:37,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:37,574 INFO L225 Difference]: With dead ends: 68 [2020-12-23 16:54:37,574 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 16:54:37,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:54:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 16:54:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-12-23 16:54:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 16:54:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-12-23 16:54:37,579 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 44 [2020-12-23 16:54:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:37,579 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-12-23 16:54:37,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:54:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-12-23 16:54:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 16:54:37,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:37,581 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:37,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:54:37,795 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:37,796 INFO L82 PathProgramCache]: Analyzing trace with hash 967653856, now seen corresponding path program 7 times [2020-12-23 16:54:37,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:37,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359393861] [2020-12-23 16:54:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:38,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359393861] [2020-12-23 16:54:38,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718558657] [2020-12-23 16:54:38,084 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 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 16:54:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 16:54:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:38,383 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:54:38,384 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:38,394 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:38,396 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:38,396 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-23 16:54:38,734 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:54:38,735 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:38,736 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:38,737 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:38,737 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-23 16:54:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:38,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:38,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2020-12-23 16:54:38,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75690112] [2020-12-23 16:54:38,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:54:38,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:38,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:54:38,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:54:38,750 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 29 states. [2020-12-23 16:54:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:39,582 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-12-23 16:54:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:54:39,583 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2020-12-23 16:54:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:39,584 INFO L225 Difference]: With dead ends: 105 [2020-12-23 16:54:39,584 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 16:54:39,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:54:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 16:54:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-12-23 16:54:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 16:54:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-12-23 16:54:39,587 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 49 [2020-12-23 16:54:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:39,588 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-12-23 16:54:39,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:54:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-12-23 16:54:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 16:54:39,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:39,589 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:39,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:39,803 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:39,804 INFO L82 PathProgramCache]: Analyzing trace with hash 999955645, now seen corresponding path program 8 times [2020-12-23 16:54:39,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:39,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568316919] [2020-12-23 16:54:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:40,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568316919] [2020-12-23 16:54:40,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869664788] [2020-12-23 16:54:40,024 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 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 16:54:40,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:54:40,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:40,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 16:54:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:40,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:40,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2020-12-23 16:54:40,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464196627] [2020-12-23 16:54:40,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:54:40,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:40,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:54:40,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:54:40,376 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 24 states. [2020-12-23 16:54:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:40,940 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2020-12-23 16:54:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:54:40,941 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-12-23 16:54:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:40,942 INFO L225 Difference]: With dead ends: 79 [2020-12-23 16:54:40,942 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 16:54:40,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:54:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 16:54:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-12-23 16:54:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 16:54:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-12-23 16:54:40,945 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 53 [2020-12-23 16:54:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:40,946 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-12-23 16:54:40,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:54:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-12-23 16:54:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 16:54:40,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:40,947 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:41,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:41,162 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:41,163 INFO L82 PathProgramCache]: Analyzing trace with hash -36316953, now seen corresponding path program 9 times [2020-12-23 16:54:41,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:41,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967134730] [2020-12-23 16:54:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:41,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967134730] [2020-12-23 16:54:41,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424980350] [2020-12-23 16:54:41,471 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 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 16:54:41,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 16:54:41,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 16:54:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:41,610 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 16:54:41,611 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:41,636 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:41,636 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:41,636 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:54:41,690 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 16:54:41,691 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:41,692 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:41,693 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:41,694 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:54:41,885 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:41,886 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2020-12-23 16:54:41,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:41,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:41,900 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:41,901 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:41,901 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2020-12-23 16:54:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 16:54:41,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:41,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 25 [2020-12-23 16:54:41,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525292719] [2020-12-23 16:54:41,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:54:41,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:54:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:54:41,997 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 25 states. [2020-12-23 16:54:45,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:45,656 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2020-12-23 16:54:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 16:54:45,657 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-12-23 16:54:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:45,657 INFO L225 Difference]: With dead ends: 131 [2020-12-23 16:54:45,658 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 16:54:45,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=604, Invalid=3556, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 16:54:45,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 16:54:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 16:54:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 16:54:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 16:54:45,660 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2020-12-23 16:54:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:45,661 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 16:54:45,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:54:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 16:54:45,661 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 16:54:45,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 16:54:45,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:54:45 BoogieIcfgContainer [2020-12-23 16:54:45,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:54:45,871 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:54:45,871 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:54:45,871 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:54:45,871 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:54:25" (3/4) ... [2020-12-23 16:54:45,875 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 16:54:45,886 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-23 16:54:45,887 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 16:54:45,887 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 16:54:45,936 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/strreplace-alloca-2.i-witness.graphml [2020-12-23 16:54:45,936 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:54:45,938 INFO L168 Benchmark]: Toolchain (without parser) took 21959.82 ms. Allocated memory was 172.0 MB in the beginning and 369.1 MB in the end (delta: 197.1 MB). Free memory was 146.3 MB in the beginning and 242.0 MB in the end (delta: -95.7 MB). Peak memory consumption was 102.5 MB. Max. memory is 8.0 GB. [2020-12-23 16:54:45,938 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 172.0 MB. Free memory is still 144.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:54:45,938 INFO L168 Benchmark]: CACSL2BoogieTranslator took 606.13 ms. Allocated memory is still 172.0 MB. Free memory was 146.1 MB in the beginning and 125.6 MB in the end (delta: 20.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-12-23 16:54:45,939 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.35 ms. Allocated memory is still 172.0 MB. Free memory was 125.4 MB in the beginning and 123.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:54:45,939 INFO L168 Benchmark]: Boogie Preprocessor took 29.86 ms. Allocated memory is still 172.0 MB. Free memory was 123.7 MB in the beginning and 122.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:54:45,939 INFO L168 Benchmark]: RCFGBuilder took 602.86 ms. Allocated memory is still 172.0 MB. Free memory was 122.3 MB in the beginning and 140.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 8.9 MB. Max. memory is 8.0 GB. [2020-12-23 16:54:45,940 INFO L168 Benchmark]: TraceAbstraction took 20597.36 ms. Allocated memory was 172.0 MB in the beginning and 369.1 MB in the end (delta: 197.1 MB). Free memory was 139.5 MB in the beginning and 245.2 MB in the end (delta: -105.6 MB). Peak memory consumption was 91.5 MB. Max. memory is 8.0 GB. [2020-12-23 16:54:45,940 INFO L168 Benchmark]: Witness Printer took 65.86 ms. Allocated memory is still 369.1 MB. Free memory was 245.2 MB in the beginning and 242.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:54:45,942 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 172.0 MB. Free memory is still 144.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 606.13 ms. Allocated memory is still 172.0 MB. Free memory was 146.1 MB in the beginning and 125.6 MB in the end (delta: 20.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.35 ms. Allocated memory is still 172.0 MB. Free memory was 125.4 MB in the beginning and 123.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.86 ms. Allocated memory is still 172.0 MB. Free memory was 123.7 MB in the beginning and 122.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 602.86 ms. Allocated memory is still 172.0 MB. Free memory was 122.3 MB in the beginning and 140.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 8.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20597.36 ms. Allocated memory was 172.0 MB in the beginning and 369.1 MB in the end (delta: 197.1 MB). Free memory was 139.5 MB in the beginning and 245.2 MB in the end (delta: -105.6 MB). Peak memory consumption was 91.5 MB. Max. memory is 8.0 GB. * Witness Printer took 65.86 ms. Allocated memory is still 369.1 MB. Free memory was 245.2 MB in the beginning and 242.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.4s, OverallIterations: 21, TraceHistogramMax: 6, AutomataDifference: 10.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 437 SDtfs, 2447 SDslu, 2339 SDs, 0 SdLazy, 4049 SolverSat, 425 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 678 GetRequests, 312 SyntacticMatches, 9 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 160 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 858 NumberOfCodeBlocks, 858 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 826 ConstructedInterpolants, 21 QuantifiedInterpolants, 248397 SizeOfPredicates, 100 NumberOfNonLiveVariables, 1599 ConjunctsInSsa, 343 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 289/1006 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...