/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:49:00,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:49:00,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:49:00,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:49:00,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:49:00,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:49:00,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:49:00,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:49:00,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:49:00,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:49:00,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:49:00,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:49:00,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:49:00,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:49:00,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:49:00,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:49:00,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:49:00,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:49:00,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:49:00,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:49:00,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:49:00,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:49:00,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:49:00,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:49:00,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:49:00,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:49:00,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:49:00,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:49:00,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:49:00,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:49:00,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:49:00,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:49:00,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:49:00,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:49:00,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:49:00,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:49:00,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:49:00,632 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:49:00,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:49:00,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:49:00,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:49:00,639 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:49:00,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:49:00,640 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:49:00,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:49:00,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:49:00,641 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:49:00,642 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:49:00,643 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:49:00,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:49:00,643 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:49:00,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:49:00,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:49:00,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:49:00,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:49:00,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:49:00,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:49:00,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:49:00,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:49:00,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:49:00,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:49:00,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:49:01,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:49:01,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:49:01,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:49:01,069 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:49:01,069 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:49:01,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2020-12-23 16:49:01,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f1f54790f/d52e1b092d8b4bdc9dfd853f7ebf6806/FLAG7869a1872 [2020-12-23 16:49:01,803 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:49:01,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2020-12-23 16:49:01,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f1f54790f/d52e1b092d8b4bdc9dfd853f7ebf6806/FLAG7869a1872 [2020-12-23 16:49:02,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f1f54790f/d52e1b092d8b4bdc9dfd853f7ebf6806 [2020-12-23 16:49:02,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:49:02,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:49:02,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:49:02,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:49:02,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:49:02,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138ead6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02, skipping insertion in model container [2020-12-23 16:49:02,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:49:02,205 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length~0,],IntegerLiteral[1]]]]] left hand side expression in assignment: lhs: VariableLHS[~sc1~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] [2020-12-23 16:49:02,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:49:02,508 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length~0,],IntegerLiteral[1]]]]] left hand side expression in assignment: lhs: VariableLHS[~sc1~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] [2020-12-23 16:49:02,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:49:02,611 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:49:02,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02 WrapperNode [2020-12-23 16:49:02,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:49:02,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:49:02,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:49:02,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:49:02,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:49:02,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:49:02,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:49:02,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:49:02,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (1/1) ... [2020-12-23 16:49:02,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:49:02,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:49:02,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:49:02,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:49:02,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:49:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:49:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:49:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 16:49:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:49:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:49:02,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:49:03,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:49:03,412 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 16:49:03,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:03 BoogieIcfgContainer [2020-12-23 16:49:03,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:49:03,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:49:03,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:49:03,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:49:03,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:49:02" (1/3) ... [2020-12-23 16:49:03,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fee1cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:49:03, skipping insertion in model container [2020-12-23 16:49:03,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:02" (2/3) ... [2020-12-23 16:49:03,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fee1cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:49:03, skipping insertion in model container [2020-12-23 16:49:03,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:03" (3/3) ... [2020-12-23 16:49:03,423 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk_unsafe.i [2020-12-23 16:49:03,433 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:49:03,438 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 27 error locations. [2020-12-23 16:49:03,458 INFO L253 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2020-12-23 16:49:03,480 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:49:03,480 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:49:03,481 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:49:03,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:49:03,481 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:49:03,481 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:49:03,481 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:49:03,481 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:49:03,503 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-12-23 16:49:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:49:03,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:03,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:49:03,511 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:49:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2020-12-23 16:49:03,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:03,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076579407] [2020-12-23 16:49:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:03,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076579407] [2020-12-23 16:49:03,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:03,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:49:03,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356565903] [2020-12-23 16:49:03,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:49:03,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:03,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:49:03,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:49:03,756 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 4 states. [2020-12-23 16:49:03,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:03,879 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2020-12-23 16:49:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:49:03,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:49:03,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:03,892 INFO L225 Difference]: With dead ends: 132 [2020-12-23 16:49:03,893 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 16:49:03,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:49:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 16:49:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 75. [2020-12-23 16:49:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 16:49:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-12-23 16:49:03,943 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 6 [2020-12-23 16:49:03,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:03,943 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-12-23 16:49:03,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:49:03,944 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-12-23 16:49:03,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:49:03,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:03,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:49:03,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:49:03,945 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:49:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:03,947 INFO L82 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2020-12-23 16:49:03,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:03,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347771845] [2020-12-23 16:49:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:04,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347771845] [2020-12-23 16:49:04,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:04,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:49:04,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945551712] [2020-12-23 16:49:04,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:49:04,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:49:04,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:49:04,029 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 3 states. [2020-12-23 16:49:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:04,203 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-12-23 16:49:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:49:04,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 16:49:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:04,206 INFO L225 Difference]: With dead ends: 71 [2020-12-23 16:49:04,206 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 16:49:04,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:49:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 16:49:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-23 16:49:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 16:49:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-12-23 16:49:04,236 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 6 [2020-12-23 16:49:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:04,236 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-12-23 16:49:04,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:49:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-12-23 16:49:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:49:04,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:04,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:49:04,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:49:04,240 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:49:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:04,245 INFO L82 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2020-12-23 16:49:04,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:04,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001512034] [2020-12-23 16:49:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:04,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001512034] [2020-12-23 16:49:04,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:04,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:49:04,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255954612] [2020-12-23 16:49:04,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:49:04,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:04,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:49:04,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:49:04,345 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 4 states. [2020-12-23 16:49:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:04,457 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-12-23 16:49:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:49:04,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:49:04,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:04,460 INFO L225 Difference]: With dead ends: 69 [2020-12-23 16:49:04,460 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 16:49:04,460 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 16:49:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 16:49:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-23 16:49:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 16:49:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2020-12-23 16:49:04,468 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 6 [2020-12-23 16:49:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:04,469 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2020-12-23 16:49:04,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:49:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2020-12-23 16:49:04,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:49:04,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:04,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:49:04,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:49:04,471 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:49:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2020-12-23 16:49:04,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:04,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193449785] [2020-12-23 16:49:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:04,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193449785] [2020-12-23 16:49:04,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:04,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:49:04,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516164009] [2020-12-23 16:49:04,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:04,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:04,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:04,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:04,570 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 5 states. [2020-12-23 16:49:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:04,816 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2020-12-23 16:49:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:49:04,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-23 16:49:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:04,819 INFO L225 Difference]: With dead ends: 126 [2020-12-23 16:49:04,819 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 16:49:04,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:04,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 16:49:04,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 73. [2020-12-23 16:49:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 16:49:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-12-23 16:49:04,827 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 6 [2020-12-23 16:49:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:04,828 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-12-23 16:49:04,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-12-23 16:49:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:49:04,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:04,829 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:04,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:49:04,830 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:49:04,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:04,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2020-12-23 16:49:04,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:04,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560842768] [2020-12-23 16:49:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:04,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560842768] [2020-12-23 16:49:04,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453755835] [2020-12-23 16:49:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:49:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:05,108 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:49:05,110 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:05,122 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:05,125 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:05,127 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:05,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:05,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:49:05,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874533135] [2020-12-23 16:49:05,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:49:05,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:49:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:49:05,199 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 6 states. [2020-12-23 16:49:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:05,471 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2020-12-23 16:49:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:05,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 16:49:05,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:05,473 INFO L225 Difference]: With dead ends: 124 [2020-12-23 16:49:05,473 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 16:49:05,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 16:49:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 67. [2020-12-23 16:49:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 16:49:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-12-23 16:49:05,479 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 10 [2020-12-23 16:49:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:05,480 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-12-23 16:49:05,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:49:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-12-23 16:49:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:49:05,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:05,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:05,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:05,695 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:49:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:05,697 INFO L82 PathProgramCache]: Analyzing trace with hash -318278276, now seen corresponding path program 1 times [2020-12-23 16:49:05,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:05,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725630618] [2020-12-23 16:49:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:05,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725630618] [2020-12-23 16:49:05,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:05,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:49:05,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685740873] [2020-12-23 16:49:05,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:49:05,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:49:05,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:49:05,800 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 6 states. [2020-12-23 16:49:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:05,987 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-12-23 16:49:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:49:05,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 16:49:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:05,988 INFO L225 Difference]: With dead ends: 64 [2020-12-23 16:49:05,988 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 16:49:05,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:49:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 16:49:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 16:49:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:49:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-12-23 16:49:05,993 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 15 [2020-12-23 16:49:05,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:05,993 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-12-23 16:49:05,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:49:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-12-23 16:49:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:49:05,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:05,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:05,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:49:05,995 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:49:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash -318278275, now seen corresponding path program 1 times [2020-12-23 16:49:05,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:05,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463003511] [2020-12-23 16:49:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:06,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463003511] [2020-12-23 16:49:06,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:06,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 16:49:06,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778662629] [2020-12-23 16:49:06,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:49:06,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:06,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:49:06,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:49:06,261 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 9 states. [2020-12-23 16:49:06,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:06,765 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-12-23 16:49:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:49:06,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 16:49:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:06,767 INFO L225 Difference]: With dead ends: 100 [2020-12-23 16:49:06,768 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 16:49:06,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:49:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 16:49:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2020-12-23 16:49:06,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 16:49:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-12-23 16:49:06,776 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 15 [2020-12-23 16:49:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:06,776 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-12-23 16:49:06,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:49:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-12-23 16:49:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 16:49:06,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:06,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:06,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:49:06,779 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:49:06,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:06,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1993585557, now seen corresponding path program 1 times [2020-12-23 16:49:06,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:06,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325206467] [2020-12-23 16:49:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 16:49:06,845 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 16:49:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 16:49:06,886 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 16:49:06,918 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 16:49:06,918 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 16:49:06,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:49:06,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:49:06 BoogieIcfgContainer [2020-12-23 16:49:06,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:49:06,962 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:49:06,963 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:49:06,963 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:49:06,963 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:03" (3/4) ... [2020-12-23 16:49:06,966 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 16:49:07,017 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/cstrpbrk_unsafe.i-witness.graphml [2020-12-23 16:49:07,017 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:49:07,019 INFO L168 Benchmark]: Toolchain (without parser) took 4899.36 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 124.8 MB in the beginning and 85.6 MB in the end (delta: 39.1 MB). Peak memory consumption was 71.9 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:07,020 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:49:07,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 491.28 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 103.5 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:07,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.71 ms. Allocated memory is still 151.0 MB. Free memory was 103.5 MB in the beginning and 101.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:07,021 INFO L168 Benchmark]: Boogie Preprocessor took 71.53 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 100.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:07,022 INFO L168 Benchmark]: RCFGBuilder took 658.87 ms. Allocated memory is still 151.0 MB. Free memory was 99.9 MB in the beginning and 109.5 MB in the end (delta: -9.5 MB). Peak memory consumption was 6.6 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:07,023 INFO L168 Benchmark]: TraceAbstraction took 3546.14 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 108.9 MB in the beginning and 87.7 MB in the end (delta: 21.2 MB). Peak memory consumption was 52.7 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:07,024 INFO L168 Benchmark]: Witness Printer took 55.03 ms. Allocated memory is still 182.5 MB. Free memory was 87.7 MB in the beginning and 85.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:07,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 491.28 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 103.5 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 68.71 ms. Allocated memory is still 151.0 MB. Free memory was 103.5 MB in the beginning and 101.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 71.53 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 100.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 658.87 ms. Allocated memory is still 151.0 MB. Free memory was 99.9 MB in the beginning and 109.5 MB in the end (delta: -9.5 MB). Peak memory consumption was 6.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3546.14 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 108.9 MB in the beginning and 87.7 MB in the end (delta: 21.2 MB). Peak memory consumption was 52.7 MB. Max. memory is 8.0 GB. * Witness Printer took 55.03 ms. Allocated memory is still 182.5 MB. Free memory was 87.7 MB in the beginning and 85.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 548]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L527] nondetString[length-1] = '\0' [L528] return nondetString; [L546] char* s1 = build_nondet_String(); [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L527] nondetString[length-1] = '\0' [L528] return nondetString; [L547] char* s2 = build_nondet_String(); [L532] const char *sc1; [L533] const char *s; [L534] int c; [L535] sc1 = s1 [L535] EXPR \read(*sc1) [L535] COND FALSE !(*sc1 != '\0') [L543] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 73 locations, 27 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 369 SDtfs, 1333 SDslu, 419 SDs, 0 SdLazy, 518 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 197 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 4453 SizeOfPredicates, 3 NumberOfNonLiveVariables, 41 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...