/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/memsafety/960521-1-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:57:57,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:57:57,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:57:57,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:57:57,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:57:57,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:57:57,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:57:57,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:57:57,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:57:57,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:57:57,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:57:57,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:57:57,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:57:57,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:57:57,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:57:57,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:57:57,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:57:57,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:57:57,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:57:57,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:57:57,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:57:57,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:57:57,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:57:57,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:57:57,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:57:57,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:57:57,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:57:57,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:57:57,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:57:57,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:57:57,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:57:57,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:57:57,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:57:57,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:57:57,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:57:57,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:57:57,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:57:57,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:57:57,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:57:57,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:57:57,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:57:57,358 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:57:57,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:57:57,359 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:57:57,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:57:57,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:57:57,360 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:57:57,360 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:57:57,360 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:57:57,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:57:57,361 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:57:57,362 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:57:57,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:57:57,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:57:57,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:57:57,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:57,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:57:57,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:57:57,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:57:57,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:57:57,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:57:57,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:57:57,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:57:57,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:57:57,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:57:57,904 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:57:57,905 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:57:57,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-3.i [2020-12-23 16:57:58,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95231d31a/ce524da6e7f1462b8252b94c913db7ca/FLAGb11ffdaa2 [2020-12-23 16:57:58,608 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:57:58,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-3.i [2020-12-23 16:57:58,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95231d31a/ce524da6e7f1462b8252b94c913db7ca/FLAGb11ffdaa2 [2020-12-23 16:57:58,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95231d31a/ce524da6e7f1462b8252b94c913db7ca [2020-12-23 16:57:58,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:57:58,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:57:58,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:58,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:57:58,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:57:58,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:58" (1/1) ... [2020-12-23 16:57:58,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5606674f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:58, skipping insertion in model container [2020-12-23 16:57:58,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:58" (1/1) ... [2020-12-23 16:57:58,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:57:58,998 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post9,] [2020-12-23 16:57:59,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:59,366 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post9,] [2020-12-23 16:57:59,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:59,507 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:57:59,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59 WrapperNode [2020-12-23 16:57:59,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:59,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:59,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:57:59,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:57:59,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (1/1) ... [2020-12-23 16:57:59,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (1/1) ... [2020-12-23 16:57:59,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:59,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:57:59,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:57:59,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:57:59,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (1/1) ... [2020-12-23 16:57:59,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (1/1) ... [2020-12-23 16:57:59,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (1/1) ... [2020-12-23 16:57:59,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (1/1) ... [2020-12-23 16:57:59,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (1/1) ... [2020-12-23 16:57:59,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (1/1) ... [2020-12-23 16:57:59,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (1/1) ... [2020-12-23 16:57:59,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:57:59,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:57:59,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:57:59,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:57:59,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:59,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:57:59,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:57:59,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 16:57:59,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:57:59,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:57:59,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 16:57:59,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:57:59,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:58:00,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:58:00,270 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 16:58:00,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:58:00 BoogieIcfgContainer [2020-12-23 16:58:00,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:58:00,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:58:00,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:58:00,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:58:00,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:57:58" (1/3) ... [2020-12-23 16:58:00,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2379a227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:58:00, skipping insertion in model container [2020-12-23 16:58:00,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:59" (2/3) ... [2020-12-23 16:58:00,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2379a227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:58:00, skipping insertion in model container [2020-12-23 16:58:00,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:58:00" (3/3) ... [2020-12-23 16:58:00,282 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-3.i [2020-12-23 16:58:00,288 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:58:00,294 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2020-12-23 16:58:00,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2020-12-23 16:58:00,338 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:58:00,338 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:58:00,338 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:58:00,339 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:58:00,339 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:58:00,339 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:58:00,339 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:58:00,339 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:58:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-23 16:58:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-23 16:58:00,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:00,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-23 16:58:00,370 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:00,376 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2020-12-23 16:58:00,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:00,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524462985] [2020-12-23 16:58:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:00,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524462985] [2020-12-23 16:58:00,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:00,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:58:00,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368166464] [2020-12-23 16:58:00,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:58:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:00,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:58:00,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:58:00,597 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-12-23 16:58:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:00,681 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-23 16:58:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:58:00,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-23 16:58:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:00,692 INFO L225 Difference]: With dead ends: 49 [2020-12-23 16:58:00,692 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 16:58:00,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:58:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 16:58:00,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 16:58:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:58:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-23 16:58:00,735 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2020-12-23 16:58:00,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:00,736 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-23 16:58:00,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:58:00,736 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-23 16:58:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-23 16:58:00,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:00,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-23 16:58:00,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:58:00,738 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:00,740 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2020-12-23 16:58:00,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:00,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686735521] [2020-12-23 16:58:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:00,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686735521] [2020-12-23 16:58:00,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:00,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:58:00,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332102456] [2020-12-23 16:58:00,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:58:00,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:58:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:58:00,879 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 3 states. [2020-12-23 16:58:00,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:00,905 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-23 16:58:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:58:00,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-23 16:58:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:00,907 INFO L225 Difference]: With dead ends: 46 [2020-12-23 16:58:00,907 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 16:58:00,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:58:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 16:58:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 16:58:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:58:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-23 16:58:00,915 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 3 [2020-12-23 16:58:00,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:00,916 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-23 16:58:00,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:58:00,916 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-23 16:58:00,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:58:00,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:00,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:58:00,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:58:00,918 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:00,919 INFO L82 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2020-12-23 16:58:00,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:00,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938685623] [2020-12-23 16:58:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:00,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938685623] [2020-12-23 16:58:00,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:00,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:58:00,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802871671] [2020-12-23 16:58:00,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:58:00,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:00,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:58:00,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:58:00,997 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2020-12-23 16:58:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:01,046 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-23 16:58:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:58:01,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:58:01,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:01,048 INFO L225 Difference]: With dead ends: 43 [2020-12-23 16:58:01,048 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 16:58:01,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:58:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 16:58:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 16:58:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 16:58:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-12-23 16:58:01,056 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 6 [2020-12-23 16:58:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:01,056 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-12-23 16:58:01,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:58:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-12-23 16:58:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:58:01,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:01,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:58:01,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:58:01,058 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:01,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:01,059 INFO L82 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2020-12-23 16:58:01,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:01,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671850115] [2020-12-23 16:58:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:01,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671850115] [2020-12-23 16:58:01,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:01,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:58:01,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948907150] [2020-12-23 16:58:01,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:58:01,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:58:01,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:58:01,167 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 5 states. [2020-12-23 16:58:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:01,275 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-23 16:58:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:58:01,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-23 16:58:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:01,277 INFO L225 Difference]: With dead ends: 49 [2020-12-23 16:58:01,277 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 16:58:01,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:58:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 16:58:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-12-23 16:58:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 16:58:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-23 16:58:01,284 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2020-12-23 16:58:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:01,284 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-23 16:58:01,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:58:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-23 16:58:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:58:01,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:01,285 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:01,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:58:01,286 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:01,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:01,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2020-12-23 16:58:01,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:01,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691148753] [2020-12-23 16:58:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:01,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691148753] [2020-12-23 16:58:01,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295434644] [2020-12-23 16:58:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:01,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 16:58:01,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:01,659 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 16:58:01,660 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 16:58:01,664 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,676 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:01,708 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:58:01,708 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-23 16:58:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:01,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:01,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-12-23 16:58:01,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874588715] [2020-12-23 16:58:01,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:58:01,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:01,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:58:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:58:01,845 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 9 states. [2020-12-23 16:58:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:02,066 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-23 16:58:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:58:02,067 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 16:58:02,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:02,068 INFO L225 Difference]: With dead ends: 57 [2020-12-23 16:58:02,068 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 16:58:02,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:58:02,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 16:58:02,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-12-23 16:58:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 16:58:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-23 16:58:02,074 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 9 [2020-12-23 16:58:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:02,075 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-23 16:58:02,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:58:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-23 16:58:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 16:58:02,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:02,076 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 16:58:02,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:02,290 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:02,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1472839145, now seen corresponding path program 2 times [2020-12-23 16:58:02,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:02,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817214425] [2020-12-23 16:58:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:02,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817214425] [2020-12-23 16:58:02,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146341893] [2020-12-23 16:58:02,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:02,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:58:02,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:02,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 16:58:02,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:02,509 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 16:58:02,510 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 16:58:02,512 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:02,519 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:02,522 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:58:02,522 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-12-23 16:58:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:02,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:02,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 16:58:02,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367316460] [2020-12-23 16:58:02,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 16:58:02,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 16:58:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:58:02,673 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2020-12-23 16:58:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:02,988 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2020-12-23 16:58:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:58:02,989 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-12-23 16:58:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:02,990 INFO L225 Difference]: With dead ends: 120 [2020-12-23 16:58:02,990 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 16:58:02,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:58:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 16:58:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 54. [2020-12-23 16:58:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 16:58:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-12-23 16:58:02,997 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 12 [2020-12-23 16:58:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:02,998 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-12-23 16:58:02,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 16:58:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-12-23 16:58:02,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:58:02,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:02,999 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:03,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:03,213 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:03,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:03,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502829, now seen corresponding path program 1 times [2020-12-23 16:58:03,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:03,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562049887] [2020-12-23 16:58:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:58:03,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562049887] [2020-12-23 16:58:03,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:03,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:58:03,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718579220] [2020-12-23 16:58:03,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:58:03,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:03,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:58:03,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:58:03,271 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2020-12-23 16:58:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:03,315 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-23 16:58:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:58:03,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-23 16:58:03,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:03,317 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:58:03,317 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 16:58:03,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:58:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 16:58:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 16:58:03,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:58:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-23 16:58:03,322 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 20 [2020-12-23 16:58:03,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:03,322 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-23 16:58:03,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:58:03,323 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-23 16:58:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:58:03,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:03,323 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:03,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:58:03,324 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 1 times [2020-12-23 16:58:03,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:03,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358689375] [2020-12-23 16:58:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:03,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358689375] [2020-12-23 16:58:03,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117919536] [2020-12-23 16:58:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:03,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 16:58:03,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:03,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:03,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-23 16:58:03,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876627581] [2020-12-23 16:58:03,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:58:03,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:03,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:58:03,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:58:03,554 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 13 states. [2020-12-23 16:58:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:03,668 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-12-23 16:58:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:58:03,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-12-23 16:58:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:03,669 INFO L225 Difference]: With dead ends: 73 [2020-12-23 16:58:03,669 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 16:58:03,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:58:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 16:58:03,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-12-23 16:58:03,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:58:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-12-23 16:58:03,675 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 20 [2020-12-23 16:58:03,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:03,675 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-12-23 16:58:03,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:58:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-12-23 16:58:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 16:58:03,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:03,676 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:03,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:03,890 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:03,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:03,890 INFO L82 PathProgramCache]: Analyzing trace with hash 116531578, now seen corresponding path program 2 times [2020-12-23 16:58:03,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:03,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304021080] [2020-12-23 16:58:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:04,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304021080] [2020-12-23 16:58:04,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823953829] [2020-12-23 16:58:04,009 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:04,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:58:04,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:04,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 16:58:04,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:04,096 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 16:58:04,097 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 16:58:04,098 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:04,109 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:04,113 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:58:04,114 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-23 16:58:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:58:04,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:58:04,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2020-12-23 16:58:04,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761017925] [2020-12-23 16:58:04,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:58:04,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:58:04,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:58:04,222 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 5 states. [2020-12-23 16:58:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:04,297 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-23 16:58:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:58:04,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-23 16:58:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:04,299 INFO L225 Difference]: With dead ends: 40 [2020-12-23 16:58:04,299 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 16:58:04,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:58:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 16:58:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 16:58:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 16:58:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-12-23 16:58:04,304 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 23 [2020-12-23 16:58:04,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:04,305 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-12-23 16:58:04,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:58:04,305 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-12-23 16:58:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:58:04,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:04,306 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:04,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:04,520 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1258641039, now seen corresponding path program 1 times [2020-12-23 16:58:04,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:04,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491123331] [2020-12-23 16:58:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:58:04,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491123331] [2020-12-23 16:58:04,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451456378] [2020-12-23 16:58:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:04,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 16:58:04,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:58:04,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:04,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 16:58:04,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457860568] [2020-12-23 16:58:04,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:58:04,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:58:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:58:04,812 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2020-12-23 16:58:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:04,967 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-23 16:58:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:58:04,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-23 16:58:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:04,968 INFO L225 Difference]: With dead ends: 55 [2020-12-23 16:58:04,968 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 16:58:04,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:58:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 16:58:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-12-23 16:58:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:58:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 16:58:04,972 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2020-12-23 16:58:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:04,972 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 16:58:04,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:58:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 16:58:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 16:58:04,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:04,973 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:05,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 16:58:05,188 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 2 times [2020-12-23 16:58:05,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:05,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942371139] [2020-12-23 16:58:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:58:05,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942371139] [2020-12-23 16:58:05,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321175840] [2020-12-23 16:58:05,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:05,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:58:05,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:05,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 16:58:05,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:58:05,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:05,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-23 16:58:05,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496350018] [2020-12-23 16:58:05,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:58:05,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:05,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:58:05,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:58:05,541 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 17 states. [2020-12-23 16:58:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:05,665 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-12-23 16:58:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:58:05,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-12-23 16:58:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:05,667 INFO L225 Difference]: With dead ends: 62 [2020-12-23 16:58:05,667 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 16:58:05,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:58:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 16:58:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-12-23 16:58:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:58:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-12-23 16:58:05,671 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 29 [2020-12-23 16:58:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:05,671 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-12-23 16:58:05,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:58:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-12-23 16:58:05,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 16:58:05,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:05,673 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:05,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:05,887 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:05,888 INFO L82 PathProgramCache]: Analyzing trace with hash 611161295, now seen corresponding path program 3 times [2020-12-23 16:58:05,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:05,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328344533] [2020-12-23 16:58:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:58:06,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328344533] [2020-12-23 16:58:06,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899511858] [2020-12-23 16:58:06,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:06,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 16:58:06,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:06,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 16:58:06,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:06,147 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 16:58:06,148 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 16:58:06,150 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:06,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:06,175 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:58:06,175 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-23 16:58:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:58:06,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:58:06,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2020-12-23 16:58:06,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608307866] [2020-12-23 16:58:06,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:58:06,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:06,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:58:06,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:58:06,421 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 7 states. [2020-12-23 16:58:06,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:06,518 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-12-23 16:58:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:58:06,519 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-23 16:58:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:06,519 INFO L225 Difference]: With dead ends: 51 [2020-12-23 16:58:06,519 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 16:58:06,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:58:06,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 16:58:06,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 16:58:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 16:58:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 16:58:06,523 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 32 [2020-12-23 16:58:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:06,523 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 16:58:06,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:58:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 16:58:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 16:58:06,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:06,525 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:06,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:06,739 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:06,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:06,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1296192761, now seen corresponding path program 1 times [2020-12-23 16:58:06,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:06,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581419037] [2020-12-23 16:58:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:58:06,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581419037] [2020-12-23 16:58:06,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724529020] [2020-12-23 16:58:06,874 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:06,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 16:58:06,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:58:07,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:07,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-23 16:58:07,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190962035] [2020-12-23 16:58:07,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:58:07,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:07,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:58:07,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:58:07,181 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-12-23 16:58:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:07,353 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-23 16:58:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:58:07,354 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-12-23 16:58:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:07,354 INFO L225 Difference]: With dead ends: 61 [2020-12-23 16:58:07,355 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 16:58:07,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:58:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 16:58:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-12-23 16:58:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:58:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-23 16:58:07,359 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 50 [2020-12-23 16:58:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:07,359 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-23 16:58:07,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:58:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-23 16:58:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 16:58:07,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:07,361 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:07,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 16:58:07,574 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1280603486, now seen corresponding path program 2 times [2020-12-23 16:58:07,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:07,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609098500] [2020-12-23 16:58:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:58:07,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609098500] [2020-12-23 16:58:07,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234203309] [2020-12-23 16:58:07,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:07,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:58:07,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:07,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:58:07,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:58:08,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:08,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-23 16:58:08,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173539608] [2020-12-23 16:58:08,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 16:58:08,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:08,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 16:58:08,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:58:08,013 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-12-23 16:58:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:08,184 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-23 16:58:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:58:08,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-12-23 16:58:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:08,185 INFO L225 Difference]: With dead ends: 67 [2020-12-23 16:58:08,186 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 16:58:08,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:58:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 16:58:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-12-23 16:58:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 16:58:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-23 16:58:08,189 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 56 [2020-12-23 16:58:08,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:08,190 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-23 16:58:08,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 16:58:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-23 16:58:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 16:58:08,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:08,191 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:08,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:08,406 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:08,407 INFO L82 PathProgramCache]: Analyzing trace with hash -550292647, now seen corresponding path program 3 times [2020-12-23 16:58:08,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:08,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235743996] [2020-12-23 16:58:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 16:58:08,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235743996] [2020-12-23 16:58:08,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301089698] [2020-12-23 16:58:08,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:09,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 16:58:09,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:09,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:58:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 16:58:09,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:09,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 16:58:09,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746614203] [2020-12-23 16:58:09,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:58:09,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:09,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:58:09,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:58:09,137 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 13 states. [2020-12-23 16:58:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:09,273 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-12-23 16:58:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:58:09,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-12-23 16:58:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:09,276 INFO L225 Difference]: With dead ends: 74 [2020-12-23 16:58:09,276 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 16:58:09,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:58:09,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 16:58:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-12-23 16:58:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 16:58:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-23 16:58:09,291 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2020-12-23 16:58:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:09,293 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-23 16:58:09,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:58:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-23 16:58:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 16:58:09,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:09,296 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:09,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 16:58:09,498 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:09,499 INFO L82 PathProgramCache]: Analyzing trace with hash 123506724, now seen corresponding path program 4 times [2020-12-23 16:58:09,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:09,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183508678] [2020-12-23 16:58:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 16:58:09,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183508678] [2020-12-23 16:58:09,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710361442] [2020-12-23 16:58:09,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:10,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:58:10,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:10,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:58:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 16:58:10,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:10,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-23 16:58:10,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879322218] [2020-12-23 16:58:10,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:58:10,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:10,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:58:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:58:10,833 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2020-12-23 16:58:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:11,076 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-12-23 16:58:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:58:11,077 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-12-23 16:58:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:11,078 INFO L225 Difference]: With dead ends: 79 [2020-12-23 16:58:11,078 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 16:58:11,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=392, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:58:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 16:58:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-12-23 16:58:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 16:58:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-12-23 16:58:11,082 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 65 [2020-12-23 16:58:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:11,083 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-12-23 16:58:11,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:58:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-12-23 16:58:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 16:58:11,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:11,084 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:11,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 16:58:11,298 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:11,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1834510777, now seen corresponding path program 5 times [2020-12-23 16:58:11,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:11,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079051416] [2020-12-23 16:58:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 16:58:11,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079051416] [2020-12-23 16:58:11,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039227559] [2020-12-23 16:58:11,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:14,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 16:58:14,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:14,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 16:58:14,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 16:58:14,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:14,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 16:58:14,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068101339] [2020-12-23 16:58:14,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:58:14,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:14,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:58:14,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:58:14,461 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 15 states. [2020-12-23 16:58:14,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:14,636 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-12-23 16:58:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:58:14,637 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-12-23 16:58:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:14,638 INFO L225 Difference]: With dead ends: 86 [2020-12-23 16:58:14,638 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 16:58:14,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:58:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 16:58:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-12-23 16:58:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 16:58:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-23 16:58:14,642 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2020-12-23 16:58:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:14,643 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-23 16:58:14,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:58:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-23 16:58:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 16:58:14,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:14,644 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:14,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:58:14,859 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1546699324, now seen corresponding path program 6 times [2020-12-23 16:58:14,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:14,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351995626] [2020-12-23 16:58:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 16:58:15,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351995626] [2020-12-23 16:58:15,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088421152] [2020-12-23 16:58:15,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:15,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 16:58:15,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 16:58:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:58:16,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:16,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-23 16:58:16,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677073710] [2020-12-23 16:58:16,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:58:16,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:16,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:58:16,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=458, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:58:16,202 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 28 states. [2020-12-23 16:58:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:16,498 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-12-23 16:58:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:58:16,499 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 77 [2020-12-23 16:58:16,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:16,500 INFO L225 Difference]: With dead ends: 91 [2020-12-23 16:58:16,500 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 16:58:16,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=343, Invalid=527, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:58:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 16:58:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-12-23 16:58:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 16:58:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-12-23 16:58:16,504 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 77 [2020-12-23 16:58:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:16,504 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-12-23 16:58:16,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:58:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-12-23 16:58:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 16:58:16,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:16,505 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:16,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:58:16,721 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:16,721 INFO L82 PathProgramCache]: Analyzing trace with hash 790624281, now seen corresponding path program 7 times [2020-12-23 16:58:16,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:16,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833436505] [2020-12-23 16:58:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 16:58:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833436505] [2020-12-23 16:58:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186471196] [2020-12-23 16:58:16,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:16,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 16:58:16,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 16:58:17,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:17,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2020-12-23 16:58:17,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732186947] [2020-12-23 16:58:17,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 16:58:17,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 16:58:17,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=571, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:58:17,348 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 31 states. [2020-12-23 16:58:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:17,666 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-12-23 16:58:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:58:17,666 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 86 [2020-12-23 16:58:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:17,667 INFO L225 Difference]: With dead ends: 97 [2020-12-23 16:58:17,667 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 16:58:17,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=390, Invalid=602, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:58:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 16:58:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-12-23 16:58:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 16:58:17,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-12-23 16:58:17,671 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 86 [2020-12-23 16:58:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:17,672 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-12-23 16:58:17,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 16:58:17,672 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-12-23 16:58:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 16:58:17,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:17,673 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:17,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:17,887 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:17,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:17,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1522820802, now seen corresponding path program 8 times [2020-12-23 16:58:17,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:17,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638639027] [2020-12-23 16:58:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 16:58:18,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638639027] [2020-12-23 16:58:18,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869595697] [2020-12-23 16:58:18,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:18,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:58:18,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 16:58:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 16:58:18,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:18,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2020-12-23 16:58:18,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768036078] [2020-12-23 16:58:18,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:58:18,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:18,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:58:18,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=649, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:58:18,639 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 33 states. [2020-12-23 16:58:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:18,944 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2020-12-23 16:58:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:58:18,945 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2020-12-23 16:58:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:18,946 INFO L225 Difference]: With dead ends: 103 [2020-12-23 16:58:18,946 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 16:58:18,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=440, Invalid=682, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:58:18,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 16:58:18,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-12-23 16:58:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 16:58:18,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-12-23 16:58:18,950 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 92 [2020-12-23 16:58:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:18,950 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-12-23 16:58:18,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 16:58:18,950 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-12-23 16:58:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 16:58:18,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:18,951 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:19,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:19,165 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash -109584775, now seen corresponding path program 9 times [2020-12-23 16:58:19,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:19,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080624667] [2020-12-23 16:58:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 16:58:19,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080624667] [2020-12-23 16:58:19,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949439264] [2020-12-23 16:58:19,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:20,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 16:58:20,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 16:58:20,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 43 proven. 330 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 16:58:21,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:21,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 22 [2020-12-23 16:58:21,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799837539] [2020-12-23 16:58:21,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:58:21,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:21,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:58:21,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:58:21,191 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 22 states. [2020-12-23 16:58:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:21,837 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2020-12-23 16:58:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:58:21,837 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-23 16:58:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:21,839 INFO L225 Difference]: With dead ends: 113 [2020-12-23 16:58:21,839 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 16:58:21,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=517, Invalid=889, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:58:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 16:58:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2020-12-23 16:58:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 16:58:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-12-23 16:58:21,844 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 98 [2020-12-23 16:58:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:21,844 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-12-23 16:58:21,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:58:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-12-23 16:58:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 16:58:21,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:21,845 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:22,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:22,060 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:22,061 INFO L82 PathProgramCache]: Analyzing trace with hash -54334780, now seen corresponding path program 10 times [2020-12-23 16:58:22,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:22,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011324547] [2020-12-23 16:58:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-23 16:58:22,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011324547] [2020-12-23 16:58:22,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229201331] [2020-12-23 16:58:22,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:32,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:58:32,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:32,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:58:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 16:58:33,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:33,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2020-12-23 16:58:33,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188146266] [2020-12-23 16:58:33,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 16:58:33,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:33,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 16:58:33,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:58:33,261 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 38 states. [2020-12-23 16:58:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:33,598 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2020-12-23 16:58:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:58:33,601 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2020-12-23 16:58:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:33,602 INFO L225 Difference]: With dead ends: 121 [2020-12-23 16:58:33,603 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 16:58:33,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:58:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 16:58:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2020-12-23 16:58:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 16:58:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-12-23 16:58:33,606 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 107 [2020-12-23 16:58:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:33,607 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-12-23 16:58:33,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 16:58:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-12-23 16:58:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 16:58:33,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:33,608 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:33,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 16:58:33,824 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash -517681538, now seen corresponding path program 11 times [2020-12-23 16:58:33,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:33,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23473455] [2020-12-23 16:58:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 16:58:34,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23473455] [2020-12-23 16:58:34,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878526894] [2020-12-23 16:58:34,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:19,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 16:59:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:19,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:59:19,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 16:59:19,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:19,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 16:59:19,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851212043] [2020-12-23 16:59:19,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:59:19,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:19,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:59:19,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:59:19,500 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 22 states. [2020-12-23 16:59:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:19,762 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-12-23 16:59:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:59:19,763 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2020-12-23 16:59:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:19,764 INFO L225 Difference]: With dead ends: 128 [2020-12-23 16:59:19,764 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 16:59:19,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:59:19,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 16:59:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-12-23 16:59:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 16:59:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-12-23 16:59:19,767 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2020-12-23 16:59:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:19,768 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-12-23 16:59:19,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:59:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-12-23 16:59:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 16:59:19,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:19,769 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:19,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 16:59:19,974 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:59:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:19,974 INFO L82 PathProgramCache]: Analyzing trace with hash 978446047, now seen corresponding path program 12 times [2020-12-23 16:59:19,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:19,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666666610] [2020-12-23 16:59:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 16:59:20,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666666610] [2020-12-23 16:59:20,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479225847] [2020-12-23 16:59:20,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:48,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-23 16:59:48,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 16:59:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 16:59:48,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:48,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 16:59:48,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086063265] [2020-12-23 16:59:48,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:59:48,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:48,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:59:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:59:48,304 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 23 states. [2020-12-23 16:59:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:48,556 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2020-12-23 16:59:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:59:48,556 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2020-12-23 16:59:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:48,558 INFO L225 Difference]: With dead ends: 135 [2020-12-23 16:59:48,558 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 16:59:48,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:59:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 16:59:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2020-12-23 16:59:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 16:59:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-12-23 16:59:48,563 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 119 [2020-12-23 16:59:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:48,563 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-12-23 16:59:48,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:59:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-12-23 16:59:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 16:59:48,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:48,564 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:48,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 16:59:48,765 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:59:48,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1055267106, now seen corresponding path program 13 times [2020-12-23 16:59:48,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:48,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46793310] [2020-12-23 16:59:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 16:59:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46793310] [2020-12-23 16:59:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649859399] [2020-12-23 16:59:49,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:49,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 16:59:49,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 16:59:49,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:49,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2020-12-23 16:59:49,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181389561] [2020-12-23 16:59:49,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 16:59:49,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:49,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 16:59:49,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=1096, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:59:49,745 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 43 states. [2020-12-23 16:59:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:50,198 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2020-12-23 16:59:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:59:50,198 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 122 [2020-12-23 16:59:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:50,199 INFO L225 Difference]: With dead ends: 139 [2020-12-23 16:59:50,199 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 16:59:50,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=803, Invalid=1267, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:59:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 16:59:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2020-12-23 16:59:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 16:59:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-12-23 16:59:50,203 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 122 [2020-12-23 16:59:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:50,204 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-12-23 16:59:50,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 16:59:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-12-23 16:59:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 16:59:50,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:50,205 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:50,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 16:59:50,420 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:59:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:50,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2007867801, now seen corresponding path program 14 times [2020-12-23 16:59:50,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:50,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146144513] [2020-12-23 16:59:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 16:59:50,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146144513] [2020-12-23 16:59:50,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752464919] [2020-12-23 16:59:50,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:50,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:59:50,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:50,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:59:50,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 16:59:51,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:51,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2020-12-23 16:59:51,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120768441] [2020-12-23 16:59:51,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 16:59:51,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:51,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 16:59:51,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=1335, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 16:59:51,583 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 47 states. [2020-12-23 16:59:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:52,039 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-12-23 16:59:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:59:52,040 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2020-12-23 16:59:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:52,041 INFO L225 Difference]: With dead ends: 145 [2020-12-23 16:59:52,041 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 16:59:52,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=874, Invalid=1382, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:59:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 16:59:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2020-12-23 16:59:52,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 16:59:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-12-23 16:59:52,047 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 134 [2020-12-23 16:59:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:52,047 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-12-23 16:59:52,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 16:59:52,048 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-12-23 16:59:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 16:59:52,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:52,048 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:52,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:59:52,262 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:59:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:52,262 INFO L82 PathProgramCache]: Analyzing trace with hash -875912258, now seen corresponding path program 15 times [2020-12-23 16:59:52,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:52,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777391631] [2020-12-23 16:59:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-23 16:59:52,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777391631] [2020-12-23 16:59:52,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509285469] [2020-12-23 16:59:52,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:00:18,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-12-23 17:00:18,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:00:18,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 17:00:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:00:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-23 17:00:19,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:00:19,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2020-12-23 17:00:19,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904656595] [2020-12-23 17:00:19,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 17:00:19,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:00:19,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 17:00:19,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=1453, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 17:00:19,292 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 49 states. [2020-12-23 17:00:19,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:00:19,687 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2020-12-23 17:00:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 17:00:19,688 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2020-12-23 17:00:19,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:00:19,690 INFO L225 Difference]: With dead ends: 151 [2020-12-23 17:00:19,690 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 17:00:19,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=948, Invalid=1502, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 17:00:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 17:00:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2020-12-23 17:00:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 17:00:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-12-23 17:00:19,695 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 140 [2020-12-23 17:00:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:00:19,695 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-12-23 17:00:19,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 17:00:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-12-23 17:00:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 17:00:19,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:00:19,696 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:00:19,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:00:19,910 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:00:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:00:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1550653447, now seen corresponding path program 16 times [2020-12-23 17:00:19,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:00:19,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451891768] [2020-12-23 17:00:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:00:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:00:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-23 17:00:20,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451891768] [2020-12-23 17:00:20,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749628742] [2020-12-23 17:00:20,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:01:13,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:01:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:01:13,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 17:01:13,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:01:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-23 17:01:14,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:01:14,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2020-12-23 17:01:14,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809398144] [2020-12-23 17:01:14,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 17:01:14,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:01:14,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 17:01:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=1576, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 17:01:14,446 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 51 states. [2020-12-23 17:01:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:01:14,922 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2020-12-23 17:01:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 17:01:14,922 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2020-12-23 17:01:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:01:14,923 INFO L225 Difference]: With dead ends: 157 [2020-12-23 17:01:14,923 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 17:01:14,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1025, Invalid=1627, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 17:01:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 17:01:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2020-12-23 17:01:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 17:01:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-12-23 17:01:14,929 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 146 [2020-12-23 17:01:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:01:14,930 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-12-23 17:01:14,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 17:01:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-12-23 17:01:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 17:01:14,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:01:14,931 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:01:15,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 17:01:15,145 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:01:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:01:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash -765375906, now seen corresponding path program 17 times [2020-12-23 17:01:15,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:01:15,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560142157] [2020-12-23 17:01:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:01:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:01:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-23 17:01:15,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560142157] [2020-12-23 17:01:15,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21014599] [2020-12-23 17:01:15,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true