/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-07 05:04:28,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:04:28,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:04:28,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:04:28,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:04:28,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:04:28,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:04:28,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:04:28,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:04:28,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:04:28,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:04:28,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:04:28,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:04:28,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:04:28,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:04:28,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:04:28,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:04:28,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:04:28,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:04:28,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:04:28,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:04:28,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:04:28,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:04:28,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:04:28,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-07 05:04:28,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-07 05:04:28,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-07 05:04:28,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-07 05:04:28,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-07 05:04:28,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-07 05:04:28,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:04:28,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:04:28,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:04:28,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:04:28,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:04:28,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:04:28,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:04:28,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:04:28,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:04:28,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:04:28,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:04:28,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-01-07 05:04:28,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:04:28,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:04:28,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:04:28,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:04:28,588 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:04:28,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:04:28,589 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:04:28,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:04:28,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:04:28,590 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:04:28,591 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:04:28,592 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:04:28,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:04:28,593 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:04:28,593 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:04:28,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:04:28,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:04:28,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:04:28,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:04:28,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:04:28,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:04:28,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:04:28,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:04:28,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:04:28,596 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:04:29,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:04:29,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:04:29,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:04:29,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:04:29,388 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:04:29,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2021-01-07 05:04:29,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/75755056d/03edec524c5c49dda84a8da8f9107f46/FLAGf514e7d3a [2021-01-07 05:04:30,895 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:04:30,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2021-01-07 05:04:30,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/75755056d/03edec524c5c49dda84a8da8f9107f46/FLAGf514e7d3a [2021-01-07 05:04:30,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/75755056d/03edec524c5c49dda84a8da8f9107f46 [2021-01-07 05:04:30,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:04:30,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:04:30,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:04:30,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:04:30,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:04:30,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:04:30" (1/1) ... [2021-01-07 05:04:30,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6b1df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:30, skipping insertion in model container [2021-01-07 05:04:30,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:04:30" (1/1) ... [2021-01-07 05:04:30,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:04:31,064 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~s~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]]]]] [2021-01-07 05:04:31,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:04:31,760 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~s~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]]]]] [2021-01-07 05:04:31,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:04:31,925 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:04:31,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31 WrapperNode [2021-01-07 05:04:31,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:04:31,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:04:31,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:04:31,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:04:31,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (1/1) ... [2021-01-07 05:04:31,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (1/1) ... [2021-01-07 05:04:32,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:04:32,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:04:32,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:04:32,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:04:32,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (1/1) ... [2021-01-07 05:04:32,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (1/1) ... [2021-01-07 05:04:32,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (1/1) ... [2021-01-07 05:04:32,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (1/1) ... [2021-01-07 05:04:32,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (1/1) ... [2021-01-07 05:04:32,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (1/1) ... [2021-01-07 05:04:32,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (1/1) ... [2021-01-07 05:04:32,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:04:32,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:04:32,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:04:32,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:04:32,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:04:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:04:32,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-07 05:04:32,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-07 05:04:32,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:04:32,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:04:32,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:04:33,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:04:33,140 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-07 05:04:33,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:04:33 BoogieIcfgContainer [2021-01-07 05:04:33,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:04:33,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:04:33,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:04:33,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:04:33,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:04:30" (1/3) ... [2021-01-07 05:04:33,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a059652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:04:33, skipping insertion in model container [2021-01-07 05:04:33,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:31" (2/3) ... [2021-01-07 05:04:33,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a059652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:04:33, skipping insertion in model container [2021-01-07 05:04:33,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:04:33" (3/3) ... [2021-01-07 05:04:33,166 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2021-01-07 05:04:33,175 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:04:33,180 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2021-01-07 05:04:33,208 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-01-07 05:04:33,256 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:04:33,257 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:04:33,257 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:04:33,257 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:04:33,257 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:04:33,258 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:04:33,258 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:04:33,258 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:04:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2021-01-07 05:04:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:04:33,292 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:33,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:04:33,294 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:33,303 INFO L82 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-01-07 05:04:33,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:33,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553638803] [2021-01-07 05:04:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:33,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553638803] [2021-01-07 05:04:33,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:33,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:04:33,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715735583] [2021-01-07 05:04:33,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:04:33,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:33,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:04:33,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:33,590 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2021-01-07 05:04:33,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:33,653 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-01-07 05:04:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:04:33,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-07 05:04:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:33,667 INFO L225 Difference]: With dead ends: 42 [2021-01-07 05:04:33,667 INFO L226 Difference]: Without dead ends: 38 [2021-01-07 05:04:33,669 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 [2021-01-07 05:04:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-07 05:04:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2021-01-07 05:04:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-07 05:04:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-07 05:04:33,706 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 6 [2021-01-07 05:04:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:33,707 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-07 05:04:33,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:04:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-07 05:04:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:04:33,708 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:33,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:04:33,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:04:33,709 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:33,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:33,710 INFO L82 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-01-07 05:04:33,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:33,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61609262] [2021-01-07 05:04:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:33,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61609262] [2021-01-07 05:04:33,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:33,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:04:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461115521] [2021-01-07 05:04:33,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:04:33,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:33,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:04:33,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:04:33,758 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 3 states. [2021-01-07 05:04:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:33,788 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-01-07 05:04:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:04:33,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-07 05:04:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:33,790 INFO L225 Difference]: With dead ends: 23 [2021-01-07 05:04:33,790 INFO L226 Difference]: Without dead ends: 23 [2021-01-07 05:04:33,791 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 [2021-01-07 05:04:33,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-07 05:04:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-07 05:04:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-07 05:04:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-01-07 05:04:33,796 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2021-01-07 05:04:33,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:33,796 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-01-07 05:04:33,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:04:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-01-07 05:04:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:04:33,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:33,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:04:33,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:04:33,798 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:33,799 INFO L82 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-01-07 05:04:33,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:33,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007603937] [2021-01-07 05:04:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:33,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007603937] [2021-01-07 05:04:33,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:33,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:04:33,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555638535] [2021-01-07 05:04:33,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:04:33,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:33,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:04:33,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:33,869 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2021-01-07 05:04:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:33,909 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-01-07 05:04:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:04:33,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-07 05:04:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:33,912 INFO L225 Difference]: With dead ends: 22 [2021-01-07 05:04:33,912 INFO L226 Difference]: Without dead ends: 22 [2021-01-07 05:04:33,913 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 [2021-01-07 05:04:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-07 05:04:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-07 05:04:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-07 05:04:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-07 05:04:33,918 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2021-01-07 05:04:33,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:33,919 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-07 05:04:33,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:04:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-07 05:04:33,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:04:33,920 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:33,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:04:33,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-07 05:04:33,921 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-01-07 05:04:33,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:33,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772009662] [2021-01-07 05:04:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:34,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772009662] [2021-01-07 05:04:34,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:34,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:04:34,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096760420] [2021-01-07 05:04:34,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:04:34,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:34,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:04:34,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:04:34,061 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2021-01-07 05:04:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:34,150 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-01-07 05:04:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:04:34,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2021-01-07 05:04:34,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:34,152 INFO L225 Difference]: With dead ends: 37 [2021-01-07 05:04:34,152 INFO L226 Difference]: Without dead ends: 37 [2021-01-07 05:04:34,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:04:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-07 05:04:34,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-01-07 05:04:34,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-07 05:04:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-07 05:04:34,159 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2021-01-07 05:04:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:34,159 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-07 05:04:34,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:04:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-07 05:04:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-07 05:04:34,160 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:34,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:34,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-07 05:04:34,161 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:34,162 INFO L82 PathProgramCache]: Analyzing trace with hash 119484120, now seen corresponding path program 1 times [2021-01-07 05:04:34,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:34,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794137480] [2021-01-07 05:04:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:34,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794137480] [2021-01-07 05:04:34,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:34,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:04:34,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544152565] [2021-01-07 05:04:34,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:04:34,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:04:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:34,273 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2021-01-07 05:04:34,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:34,351 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-01-07 05:04:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:04:34,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-01-07 05:04:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:34,355 INFO L225 Difference]: With dead ends: 23 [2021-01-07 05:04:34,355 INFO L226 Difference]: Without dead ends: 23 [2021-01-07 05:04:34,356 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 [2021-01-07 05:04:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-07 05:04:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-07 05:04:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-07 05:04:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-07 05:04:34,362 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2021-01-07 05:04:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:34,363 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-07 05:04:34,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:04:34,363 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-07 05:04:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-07 05:04:34,364 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:34,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:34,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-07 05:04:34,365 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:34,367 INFO L82 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2021-01-07 05:04:34,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:34,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553880950] [2021-01-07 05:04:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:34,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553880950] [2021-01-07 05:04:34,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:34,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:04:34,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639886749] [2021-01-07 05:04:34,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:04:34,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:34,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:04:34,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:04:34,498 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2021-01-07 05:04:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:34,578 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-01-07 05:04:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:04:34,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-07 05:04:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:34,580 INFO L225 Difference]: With dead ends: 30 [2021-01-07 05:04:34,580 INFO L226 Difference]: Without dead ends: 30 [2021-01-07 05:04:34,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:04:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-07 05:04:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-01-07 05:04:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-07 05:04:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-07 05:04:34,588 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 8 [2021-01-07 05:04:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:34,589 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-07 05:04:34,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:04:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-07 05:04:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-07 05:04:34,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:34,591 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:34,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-07 05:04:34,592 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:34,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-01-07 05:04:34,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:34,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416523342] [2021-01-07 05:04:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:34,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416523342] [2021-01-07 05:04:34,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877015477] [2021-01-07 05:04:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-07 05:04:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:34,928 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 [2021-01-07 05:04:34,930 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:34,945 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:34,949 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:34,950 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:04:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:35,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:35,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-07 05:04:35,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247979430] [2021-01-07 05:04:35,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:04:35,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:35,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:04:35,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:04:35,038 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2021-01-07 05:04:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:35,144 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-01-07 05:04:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:04:35,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-07 05:04:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:35,147 INFO L225 Difference]: With dead ends: 36 [2021-01-07 05:04:35,148 INFO L226 Difference]: Without dead ends: 36 [2021-01-07 05:04:35,149 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 [2021-01-07 05:04:35,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-07 05:04:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2021-01-07 05:04:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-07 05:04:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-01-07 05:04:35,154 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2021-01-07 05:04:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:35,154 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-01-07 05:04:35,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:04:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-01-07 05:04:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-07 05:04:35,156 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:35,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:35,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-07 05:04:35,374 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:35,375 INFO L82 PathProgramCache]: Analyzing trace with hash -976458485, now seen corresponding path program 1 times [2021-01-07 05:04:35,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:35,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97025782] [2021-01-07 05:04:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:35,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97025782] [2021-01-07 05:04:35,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:35,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-07 05:04:35,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306925299] [2021-01-07 05:04:35,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-07 05:04:35,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:35,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-07 05:04:35,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:04:35,565 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2021-01-07 05:04:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:35,672 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-01-07 05:04:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-07 05:04:35,674 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2021-01-07 05:04:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:35,675 INFO L225 Difference]: With dead ends: 29 [2021-01-07 05:04:35,675 INFO L226 Difference]: Without dead ends: 29 [2021-01-07 05:04:35,676 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 [2021-01-07 05:04:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-07 05:04:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-01-07 05:04:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-07 05:04:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-07 05:04:35,680 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2021-01-07 05:04:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:35,680 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-07 05:04:35,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-07 05:04:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-07 05:04:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-07 05:04:35,681 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:35,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:35,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-07 05:04:35,683 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:35,684 INFO L82 PathProgramCache]: Analyzing trace with hash -296400115, now seen corresponding path program 1 times [2021-01-07 05:04:35,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:35,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509141388] [2021-01-07 05:04:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:35,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509141388] [2021-01-07 05:04:35,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:35,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-07 05:04:35,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843164738] [2021-01-07 05:04:35,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-07 05:04:35,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:35,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-07 05:04:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:04:35,887 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2021-01-07 05:04:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:36,082 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-01-07 05:04:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:04:36,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-01-07 05:04:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:36,084 INFO L225 Difference]: With dead ends: 37 [2021-01-07 05:04:36,084 INFO L226 Difference]: Without dead ends: 37 [2021-01-07 05:04:36,086 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 [2021-01-07 05:04:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-07 05:04:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2021-01-07 05:04:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-07 05:04:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-01-07 05:04:36,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2021-01-07 05:04:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:36,107 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-01-07 05:04:36,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-07 05:04:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-01-07 05:04:36,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-07 05:04:36,108 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:36,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:36,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-07 05:04:36,110 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash -205497247, now seen corresponding path program 1 times [2021-01-07 05:04:36,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:36,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905307622] [2021-01-07 05:04:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:36,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905307622] [2021-01-07 05:04:36,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:36,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:04:36,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041265887] [2021-01-07 05:04:36,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:04:36,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:36,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:04:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:36,269 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2021-01-07 05:04:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:36,287 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-01-07 05:04:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:04:36,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-07 05:04:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:36,291 INFO L225 Difference]: With dead ends: 25 [2021-01-07 05:04:36,291 INFO L226 Difference]: Without dead ends: 16 [2021-01-07 05:04:36,294 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 [2021-01-07 05:04:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-07 05:04:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-07 05:04:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-07 05:04:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-01-07 05:04:36,298 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-01-07 05:04:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:36,299 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-01-07 05:04:36,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:04:36,299 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-01-07 05:04:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:04:36,300 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:36,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:36,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-07 05:04:36,300 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:36,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1218087850, now seen corresponding path program 1 times [2021-01-07 05:04:36,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:36,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455629370] [2021-01-07 05:04:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:36,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455629370] [2021-01-07 05:04:36,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223407246] [2021-01-07 05:04:36,511 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 [2021-01-07 05:04:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:36,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-07 05:04:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:36,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:36,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-07 05:04:36,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829932396] [2021-01-07 05:04:36,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-07 05:04:36,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:36,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-07 05:04:36,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-01-07 05:04:36,723 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 13 states. [2021-01-07 05:04:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:36,862 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-01-07 05:04:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-07 05:04:36,863 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2021-01-07 05:04:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:36,864 INFO L225 Difference]: With dead ends: 24 [2021-01-07 05:04:36,864 INFO L226 Difference]: Without dead ends: 24 [2021-01-07 05:04:36,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-07 05:04:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-07 05:04:36,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-01-07 05:04:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-07 05:04:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-01-07 05:04:36,867 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-01-07 05:04:36,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:36,868 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-01-07 05:04:36,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-07 05:04:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-01-07 05:04:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-07 05:04:36,869 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:36,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:37,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:37,083 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:37,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash -123563366, now seen corresponding path program 2 times [2021-01-07 05:04:37,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:37,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197019802] [2021-01-07 05:04:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:37,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197019802] [2021-01-07 05:04:37,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776696733] [2021-01-07 05:04:37,426 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 [2021-01-07 05:04:37,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:04:37,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:37,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-07 05:04:37,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:37,578 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 [2021-01-07 05:04:37,581 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:37,597 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:37,602 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. [2021-01-07 05:04:37,602 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2021-01-07 05:04:38,057 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:38,059 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-01-07 05:04:38,069 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-07 05:04:38,088 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:38,094 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-07 05:04:38,101 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-07 05:04:38,106 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:38,110 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2021-01-07 05:04:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:38,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:38,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-01-07 05:04:38,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270380203] [2021-01-07 05:04:38,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-07 05:04:38,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:38,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-07 05:04:38,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-01-07 05:04:38,234 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2021-01-07 05:04:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:39,407 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-01-07 05:04:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-07 05:04:39,408 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2021-01-07 05:04:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:39,409 INFO L225 Difference]: With dead ends: 38 [2021-01-07 05:04:39,409 INFO L226 Difference]: Without dead ends: 31 [2021-01-07 05:04:39,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-01-07 05:04:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-07 05:04:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-01-07 05:04:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-07 05:04:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-01-07 05:04:39,414 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2021-01-07 05:04:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:39,414 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-01-07 05:04:39,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-07 05:04:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-01-07 05:04:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-07 05:04:39,415 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:39,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:39,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-07 05:04:39,628 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:39,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1941489159, now seen corresponding path program 3 times [2021-01-07 05:04:39,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:39,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358349378] [2021-01-07 05:04:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:39,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358349378] [2021-01-07 05:04:39,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153757970] [2021-01-07 05:04:39,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:40,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-07 05:04:40,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:40,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-07 05:04:40,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:40,226 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 [2021-01-07 05:04:40,229 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:40,240 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:40,245 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. [2021-01-07 05:04:40,246 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2021-01-07 05:04:40,442 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 [2021-01-07 05:04:40,445 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:40,447 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:40,448 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:40,448 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-07 05:04:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:40,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:40,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-01-07 05:04:40,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073119629] [2021-01-07 05:04:40,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-07 05:04:40,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:40,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-07 05:04:40,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-01-07 05:04:40,459 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 19 states. [2021-01-07 05:04:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:41,003 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-01-07 05:04:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-07 05:04:41,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2021-01-07 05:04:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:41,004 INFO L225 Difference]: With dead ends: 43 [2021-01-07 05:04:41,004 INFO L226 Difference]: Without dead ends: 33 [2021-01-07 05:04:41,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-01-07 05:04:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-07 05:04:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-01-07 05:04:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-07 05:04:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-07 05:04:41,010 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2021-01-07 05:04:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:41,011 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-07 05:04:41,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-07 05:04:41,011 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-07 05:04:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-07 05:04:41,012 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:41,012 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:41,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:41,227 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:41,228 INFO L82 PathProgramCache]: Analyzing trace with hash -413257756, now seen corresponding path program 4 times [2021-01-07 05:04:41,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:41,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555669953] [2021-01-07 05:04:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:41,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555669953] [2021-01-07 05:04:41,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864240134] [2021-01-07 05:04:41,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:41,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-07 05:04:41,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-07 05:04:41,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:41,542 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 [2021-01-07 05:04:41,543 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:41,551 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:41,553 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:41,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:04:41,662 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-07 05:04:41,663 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:41,672 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:41,675 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:41,676 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-01-07 05:04:41,900 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:41,900 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-01-07 05:04:41,903 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-07 05:04:41,915 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:41,918 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:41,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2021-01-07 05:04:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:42,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:42,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-01-07 05:04:42,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41786030] [2021-01-07 05:04:42,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-07 05:04:42,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:42,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-07 05:04:42,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-01-07 05:04:42,065 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 21 states. [2021-01-07 05:04:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:42,755 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-01-07 05:04:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-07 05:04:42,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2021-01-07 05:04:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:42,756 INFO L225 Difference]: With dead ends: 35 [2021-01-07 05:04:42,757 INFO L226 Difference]: Without dead ends: 35 [2021-01-07 05:04:42,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-01-07 05:04:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-07 05:04:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-01-07 05:04:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-07 05:04:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-07 05:04:42,761 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2021-01-07 05:04:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:42,761 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-07 05:04:42,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-07 05:04:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-07 05:04:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-07 05:04:42,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:42,763 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:42,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-07 05:04:42,977 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1985557472, now seen corresponding path program 5 times [2021-01-07 05:04:42,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:42,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325063115] [2021-01-07 05:04:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:43,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325063115] [2021-01-07 05:04:43,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10094750] [2021-01-07 05:04:43,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:43,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-07 05:04:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:43,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-07 05:04:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:43,515 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 [2021-01-07 05:04:43,516 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:43,523 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:43,525 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. [2021-01-07 05:04:43,525 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2021-01-07 05:04:43,651 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 [2021-01-07 05:04:43,652 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:43,653 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:43,654 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:43,654 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-07 05:04:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:43,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:43,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-01-07 05:04:43,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779338413] [2021-01-07 05:04:43,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-07 05:04:43,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-07 05:04:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-01-07 05:04:43,661 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2021-01-07 05:04:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:44,104 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-01-07 05:04:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-07 05:04:44,105 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2021-01-07 05:04:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:44,106 INFO L225 Difference]: With dead ends: 53 [2021-01-07 05:04:44,106 INFO L226 Difference]: Without dead ends: 40 [2021-01-07 05:04:44,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-01-07 05:04:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-07 05:04:44,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-01-07 05:04:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-07 05:04:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-01-07 05:04:44,109 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2021-01-07 05:04:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:44,110 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-01-07 05:04:44,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-07 05:04:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-01-07 05:04:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-07 05:04:44,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:44,111 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:44,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:44,315 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1423114333, now seen corresponding path program 6 times [2021-01-07 05:04:44,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:44,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276942416] [2021-01-07 05:04:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:44,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276942416] [2021-01-07 05:04:44,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93886399] [2021-01-07 05:04:44,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:44,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-07 05:04:44,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:44,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-07 05:04:44,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:44,677 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 [2021-01-07 05:04:44,677 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:44,683 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:44,684 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:44,684 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:04:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:44,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:44,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-01-07 05:04:44,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094762490] [2021-01-07 05:04:44,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-07 05:04:44,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:44,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-07 05:04:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-01-07 05:04:44,854 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 18 states. [2021-01-07 05:04:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:45,212 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-01-07 05:04:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-07 05:04:45,213 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2021-01-07 05:04:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:45,213 INFO L225 Difference]: With dead ends: 42 [2021-01-07 05:04:45,214 INFO L226 Difference]: Without dead ends: 42 [2021-01-07 05:04:45,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-01-07 05:04:45,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-07 05:04:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-01-07 05:04:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-07 05:04:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-01-07 05:04:45,218 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2021-01-07 05:04:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:45,218 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-01-07 05:04:45,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-07 05:04:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-01-07 05:04:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-07 05:04:45,219 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:45,219 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:45,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-07 05:04:45,435 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:45,436 INFO L82 PathProgramCache]: Analyzing trace with hash -376934399, now seen corresponding path program 7 times [2021-01-07 05:04:45,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:45,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517011397] [2021-01-07 05:04:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:45,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517011397] [2021-01-07 05:04:45,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816156271] [2021-01-07 05:04:45,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:45,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-07 05:04:45,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:45,990 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 [2021-01-07 05:04:45,991 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:45,999 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:46,001 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. [2021-01-07 05:04:46,001 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2021-01-07 05:04:46,160 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 [2021-01-07 05:04:46,161 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:46,163 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:46,163 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:46,163 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-07 05:04:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:46,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:46,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-01-07 05:04:46,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937985305] [2021-01-07 05:04:46,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-07 05:04:46,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:46,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-07 05:04:46,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-01-07 05:04:46,172 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 25 states. [2021-01-07 05:04:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:46,861 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-01-07 05:04:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-07 05:04:46,862 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 39 [2021-01-07 05:04:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:46,876 INFO L225 Difference]: With dead ends: 63 [2021-01-07 05:04:46,877 INFO L226 Difference]: Without dead ends: 47 [2021-01-07 05:04:46,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-01-07 05:04:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-07 05:04:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-01-07 05:04:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-07 05:04:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-01-07 05:04:46,880 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2021-01-07 05:04:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:46,881 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-01-07 05:04:46,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-07 05:04:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-01-07 05:04:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-07 05:04:46,882 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:46,882 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:47,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-07 05:04:47,098 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash 694997790, now seen corresponding path program 8 times [2021-01-07 05:04:47,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:47,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114233961] [2021-01-07 05:04:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:47,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114233961] [2021-01-07 05:04:47,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401460923] [2021-01-07 05:04:47,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:47,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:04:47,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-07 05:04:47,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:47,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:47,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-01-07 05:04:47,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862522789] [2021-01-07 05:04:47,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-07 05:04:47,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:47,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-07 05:04:47,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-01-07 05:04:47,730 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 24 states. [2021-01-07 05:04:48,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:48,136 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-01-07 05:04:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-07 05:04:48,137 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 43 [2021-01-07 05:04:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:48,137 INFO L225 Difference]: With dead ends: 49 [2021-01-07 05:04:48,137 INFO L226 Difference]: Without dead ends: 49 [2021-01-07 05:04:48,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-01-07 05:04:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-07 05:04:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-01-07 05:04:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-07 05:04:48,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-01-07 05:04:48,142 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2021-01-07 05:04:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:48,142 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-01-07 05:04:48,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-07 05:04:48,143 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-01-07 05:04:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-07 05:04:48,144 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:48,144 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:48,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-07 05:04:48,357 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1358190938, now seen corresponding path program 9 times [2021-01-07 05:04:48,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:48,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974342700] [2021-01-07 05:04:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:48,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974342700] [2021-01-07 05:04:48,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177232726] [2021-01-07 05:04:48,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:48,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-07 05:04:48,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-07 05:04:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:48,820 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 [2021-01-07 05:04:48,821 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:48,825 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:48,826 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:48,826 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2021-01-07 05:04:48,892 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 [2021-01-07 05:04:48,893 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:48,895 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:48,896 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:48,896 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2021-01-07 05:04:48,973 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:48,973 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-01-07 05:04:48,975 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-07 05:04:48,984 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:48,985 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:48,985 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2021-01-07 05:04:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-01-07 05:04:49,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:49,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7] total 24 [2021-01-07 05:04:49,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235311978] [2021-01-07 05:04:49,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-07 05:04:49,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:49,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-07 05:04:49,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2021-01-07 05:04:49,144 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2021-01-07 05:04:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:51,967 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-01-07 05:04:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-07 05:04:51,967 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2021-01-07 05:04:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:51,968 INFO L225 Difference]: With dead ends: 72 [2021-01-07 05:04:51,968 INFO L226 Difference]: Without dead ends: 0 [2021-01-07 05:04:51,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=451, Invalid=2519, Unknown=0, NotChecked=0, Total=2970 [2021-01-07 05:04:51,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-07 05:04:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-07 05:04:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-07 05:04:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-07 05:04:51,970 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2021-01-07 05:04:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:51,970 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-07 05:04:51,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-07 05:04:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-07 05:04:51,970 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-07 05:04:52,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:52,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 05:04:52 BoogieIcfgContainer [2021-01-07 05:04:52,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-07 05:04:52,178 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-07 05:04:52,178 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-07 05:04:52,179 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-07 05:04:52,179 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:04:33" (3/4) ... [2021-01-07 05:04:52,183 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-07 05:04:52,195 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-01-07 05:04:52,195 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-01-07 05:04:52,195 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-01-07 05:04:52,231 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/openbsd_cstrlen-alloca-1.i-witness.graphml [2021-01-07 05:04:52,232 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-07 05:04:52,233 INFO L168 Benchmark]: Toolchain (without parser) took 21274.04 ms. Allocated memory was 153.1 MB in the beginning and 275.8 MB in the end (delta: 122.7 MB). Free memory was 126.8 MB in the beginning and 222.3 MB in the end (delta: -95.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 8.0 GB. [2021-01-07 05:04:52,233 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 153.1 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:04:52,234 INFO L168 Benchmark]: CACSL2BoogieTranslator took 964.94 ms. Allocated memory is still 153.1 MB. Free memory was 126.6 MB in the beginning and 106.0 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:04:52,234 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.89 ms. Allocated memory is still 153.1 MB. Free memory was 106.0 MB in the beginning and 104.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:04:52,234 INFO L168 Benchmark]: Boogie Preprocessor took 55.31 ms. Allocated memory is still 153.1 MB. Free memory was 104.1 MB in the beginning and 103.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:04:52,235 INFO L168 Benchmark]: RCFGBuilder took 1058.72 ms. Allocated memory is still 153.1 MB. Free memory was 102.8 MB in the beginning and 122.1 MB in the end (delta: -19.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:04:52,235 INFO L168 Benchmark]: TraceAbstraction took 19025.78 ms. Allocated memory was 153.1 MB in the beginning and 275.8 MB in the end (delta: 122.7 MB). Free memory was 121.6 MB in the beginning and 224.9 MB in the end (delta: -103.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2021-01-07 05:04:52,235 INFO L168 Benchmark]: Witness Printer took 53.48 ms. Allocated memory is still 275.8 MB. Free memory was 224.4 MB in the beginning and 222.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:04:52,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 153.1 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 964.94 ms. Allocated memory is still 153.1 MB. Free memory was 126.6 MB in the beginning and 106.0 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 100.89 ms. Allocated memory is still 153.1 MB. Free memory was 106.0 MB in the beginning and 104.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.31 ms. Allocated memory is still 153.1 MB. Free memory was 104.1 MB in the beginning and 103.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1058.72 ms. Allocated memory is still 153.1 MB. Free memory was 102.8 MB in the beginning and 122.1 MB in the end (delta: -19.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19025.78 ms. Allocated memory was 153.1 MB in the beginning and 275.8 MB in the end (delta: 122.7 MB). Free memory was 121.6 MB in the beginning and 224.9 MB in the end (delta: -103.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * Witness Printer took 53.48 ms. Allocated memory is still 275.8 MB. Free memory was 224.4 MB in the beginning and 222.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: all allocated memory was freed For all program executions holds that all allocated memory was freed 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: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.9s, OverallIterations: 19, TraceHistogramMax: 6, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 239 SDtfs, 1006 SDslu, 1189 SDs, 0 SdLazy, 2999 SolverSat, 263 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 546 GetRequests, 235 SyntacticMatches, 8 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=18, 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, 19 MinimizatonAttempts, 87 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 660 NumberOfCodeBlocks, 656 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 631 ConstructedInterpolants, 17 QuantifiedInterpolants, 166911 SizeOfPredicates, 95 NumberOfNonLiveVariables, 1105 ConjunctsInSsa, 327 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 212/764 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...