/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/cstrchr_unsafe.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:48:48,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:48:48,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:48:48,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:48:48,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:48:48,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:48:48,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:48:48,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:48:48,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:48:48,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:48:48,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:48:48,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:48:48,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:48:48,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:48:48,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:48:48,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:48:48,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:48:48,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:48:48,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:48:48,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:48:48,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:48:48,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:48:48,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:48:48,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:48:48,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:48:48,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:48:48,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:48:48,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:48:48,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:48:48,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:48:48,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:48:48,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:48:48,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:48:48,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:48:48,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:48:48,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:48:48,425 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 16:48:48,454 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:48:48,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:48:48,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:48:48,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:48:48,457 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:48:48,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:48:48,457 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:48:48,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:48:48,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:48:48,458 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:48:48,458 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:48:48,458 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:48:48,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:48:48,459 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:48:48,459 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:48:48,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:48:48,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:48:48,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:48:48,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:48:48,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:48:48,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:48:48,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:48:48,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:48:48,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:48:48,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:48:48,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:48:48,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:48:48,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:48:48,893 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:48:48,894 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:48:48,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2020-12-23 16:48:48,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2bda0e4f6/a4f0bc33aff24c5fbc4702420bbaeaf0/FLAGa769dc7db [2020-12-23 16:48:49,785 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:48:49,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2020-12-23 16:48:49,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2bda0e4f6/a4f0bc33aff24c5fbc4702420bbaeaf0/FLAGa769dc7db [2020-12-23 16:48:50,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2bda0e4f6/a4f0bc33aff24c5fbc4702420bbaeaf0 [2020-12-23 16:48:50,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:48:50,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:48:50,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:48:50,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:48:50,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:48:50,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4174c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50, skipping insertion in model container [2020-12-23 16:48:50,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:48:50,161 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]]]]] [2020-12-23 16:48:50,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:48:50,600 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]]]]] [2020-12-23 16:48:50,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:48:50,734 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:48:50,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50 WrapperNode [2020-12-23 16:48:50,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:48:50,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:48:50,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:48:50,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:48:50,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:48:50,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:48:50,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:48:50,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:48:50,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (1/1) ... [2020-12-23 16:48:50,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:48:50,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:48:50,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:48:50,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:48:50,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (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 16:48:50,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:48:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:48:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 16:48:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:48:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:48:50,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:48:51,523 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:48:51,523 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 16:48:51,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:48:51 BoogieIcfgContainer [2020-12-23 16:48:51,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:48:51,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:48:51,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:48:51,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:48:51,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:48:50" (1/3) ... [2020-12-23 16:48:51,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d5fb0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:48:51, skipping insertion in model container [2020-12-23 16:48:51,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:50" (2/3) ... [2020-12-23 16:48:51,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d5fb0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:48:51, skipping insertion in model container [2020-12-23 16:48:51,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:48:51" (3/3) ... [2020-12-23 16:48:51,535 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2020-12-23 16:48:51,542 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:48:51,547 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-12-23 16:48:51,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-12-23 16:48:51,594 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:48:51,594 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:48:51,594 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:48:51,594 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:48:51,594 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:48:51,595 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:48:51,595 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:48:51,595 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:48:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-12-23 16:48:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:48:51,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:51,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:48:51,622 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:51,630 INFO L82 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2020-12-23 16:48:51,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:51,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929118479] [2020-12-23 16:48:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:51,851 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 16:48:51,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929118479] [2020-12-23 16:48:51,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:51,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:48:51,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407644537] [2020-12-23 16:48:51,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:51,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:51,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:51,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:51,882 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2020-12-23 16:48:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:51,937 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-12-23 16:48:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:51,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:48:51,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:51,951 INFO L225 Difference]: With dead ends: 82 [2020-12-23 16:48:51,951 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 16:48:51,953 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 16:48:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 16:48:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2020-12-23 16:48:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 16:48:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-23 16:48:51,997 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 6 [2020-12-23 16:48:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:51,998 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-23 16:48:51,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-23 16:48:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:48:51,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:51,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:48:52,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:48:52,000 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2020-12-23 16:48:52,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:52,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448590087] [2020-12-23 16:48:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:52,046 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 16:48:52,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448590087] [2020-12-23 16:48:52,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:52,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:48:52,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953608027] [2020-12-23 16:48:52,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:48:52,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:52,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:48:52,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:48:52,051 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 3 states. [2020-12-23 16:48:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:52,089 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-23 16:48:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:48:52,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 16:48:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:52,091 INFO L225 Difference]: With dead ends: 43 [2020-12-23 16:48:52,091 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 16:48:52,092 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 16:48:52,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 16:48:52,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 16:48:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 16:48:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-23 16:48:52,099 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 6 [2020-12-23 16:48:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:52,100 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-23 16:48:52,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:48:52,101 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-23 16:48:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:48:52,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:52,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:48:52,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:48:52,102 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:52,104 INFO L82 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2020-12-23 16:48:52,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:52,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692224490] [2020-12-23 16:48:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:52,226 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 16:48:52,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692224490] [2020-12-23 16:48:52,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:52,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:52,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952729842] [2020-12-23 16:48:52,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:52,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:52,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:52,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:52,236 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2020-12-23 16:48:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:52,284 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-12-23 16:48:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:52,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:48:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:52,286 INFO L225 Difference]: With dead ends: 42 [2020-12-23 16:48:52,286 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 16:48:52,287 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 16:48:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 16:48:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 16:48:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 16:48:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-23 16:48:52,293 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 6 [2020-12-23 16:48:52,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:52,293 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-23 16:48:52,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-23 16:48:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:48:52,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:52,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:48:52,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:48:52,295 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:52,296 INFO L82 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2020-12-23 16:48:52,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:52,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451726527] [2020-12-23 16:48:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:52,382 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 16:48:52,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451726527] [2020-12-23 16:48:52,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:52,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:48:52,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658956312] [2020-12-23 16:48:52,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:48:52,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:52,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:48:52,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:48:52,387 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-12-23 16:48:52,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:52,498 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2020-12-23 16:48:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:52,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-23 16:48:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:52,500 INFO L225 Difference]: With dead ends: 77 [2020-12-23 16:48:52,501 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 16:48:52,501 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 16:48:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 16:48:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2020-12-23 16:48:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 16:48:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-12-23 16:48:52,508 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 6 [2020-12-23 16:48:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:52,509 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-12-23 16:48:52,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:48:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-12-23 16:48:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:48:52,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:52,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:52,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:48:52,511 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:52,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:52,512 INFO L82 PathProgramCache]: Analyzing trace with hash -590959631, now seen corresponding path program 1 times [2020-12-23 16:48:52,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:52,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103219711] [2020-12-23 16:48:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:52,562 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 16:48:52,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103219711] [2020-12-23 16:48:52,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:52,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:48:52,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857077165] [2020-12-23 16:48:52,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:48:52,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:52,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:48:52,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:48:52,565 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 5 states. [2020-12-23 16:48:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:52,637 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-23 16:48:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:48:52,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 16:48:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:52,638 INFO L225 Difference]: With dead ends: 41 [2020-12-23 16:48:52,638 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 16:48:52,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:48:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 16:48:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 16:48:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 16:48:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-12-23 16:48:52,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 9 [2020-12-23 16:48:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:52,645 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-12-23 16:48:52,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:48:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-12-23 16:48:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:48:52,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:52,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:52,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:48:52,646 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:52,647 INFO L82 PathProgramCache]: Analyzing trace with hash -590959630, now seen corresponding path program 1 times [2020-12-23 16:48:52,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:52,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108003158] [2020-12-23 16:48:52,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:52,776 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 16:48:52,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108003158] [2020-12-23 16:48:52,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:52,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:48:52,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351708460] [2020-12-23 16:48:52,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:48:52,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:48:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:48:52,782 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 7 states. [2020-12-23 16:48:52,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:52,908 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2020-12-23 16:48:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:48:52,909 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-23 16:48:52,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:52,910 INFO L225 Difference]: With dead ends: 63 [2020-12-23 16:48:52,910 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 16:48:52,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:48:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 16:48:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-12-23 16:48:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 16:48:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-12-23 16:48:52,933 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 9 [2020-12-23 16:48:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:52,933 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-12-23 16:48:52,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:48:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-12-23 16:48:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:48:52,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:52,935 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:52,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:48:52,935 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:52,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2020-12-23 16:48:52,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:52,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999541793] [2020-12-23 16:48:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:53,029 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 16:48:53,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999541793] [2020-12-23 16:48:53,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703835901] [2020-12-23 16:48:53,031 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 16:48:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:53,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:48:53,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:48:53,170 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 16:48:53,172 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:48:53,179 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:48:53,180 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:48:53,181 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:48:53,238 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 16:48:53,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:48:53,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:48:53,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006987616] [2020-12-23 16:48:53,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:48:53,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:53,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:48:53,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:48:53,241 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 6 states. [2020-12-23 16:48:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:53,350 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-12-23 16:48:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:48:53,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 16:48:53,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:53,351 INFO L225 Difference]: With dead ends: 84 [2020-12-23 16:48:53,352 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 16:48:53,352 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 16:48:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 16:48:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2020-12-23 16:48:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 16:48:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-12-23 16:48:53,357 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 10 [2020-12-23 16:48:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:53,357 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-12-23 16:48:53,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:48:53,357 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-12-23 16:48:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:48:53,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:53,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:53,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 16:48:53,574 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:53,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2134761079, now seen corresponding path program 1 times [2020-12-23 16:48:53,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:53,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751426380] [2020-12-23 16:48:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:53,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751426380] [2020-12-23 16:48:53,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:53,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:53,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910395464] [2020-12-23 16:48:53,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:48:53,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:48:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:48:53,611 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 3 states. [2020-12-23 16:48:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:53,621 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-12-23 16:48:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:48:53,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-23 16:48:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:53,622 INFO L225 Difference]: With dead ends: 47 [2020-12-23 16:48:53,622 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 16:48:53,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 16:48:53,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 16:48:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 16:48:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:48:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-12-23 16:48:53,626 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 13 [2020-12-23 16:48:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:53,627 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-12-23 16:48:53,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:48:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-12-23 16:48:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:48:53,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:53,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:53,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:48:53,628 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:53,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1483111174, now seen corresponding path program 1 times [2020-12-23 16:48:53,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:53,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178617937] [2020-12-23 16:48:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:53,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178617937] [2020-12-23 16:48:53,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:53,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 16:48:53,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244465971] [2020-12-23 16:48:53,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:48:53,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:53,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:48:53,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:48:53,760 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 9 states. [2020-12-23 16:48:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:53,943 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-12-23 16:48:53,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:48:53,944 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 16:48:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:53,945 INFO L225 Difference]: With dead ends: 70 [2020-12-23 16:48:53,945 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 16:48:53,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:48:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 16:48:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2020-12-23 16:48:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 16:48:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-23 16:48:53,949 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 15 [2020-12-23 16:48:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:53,950 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-23 16:48:53,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:48:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-23 16:48:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:48:53,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:53,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:53,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 16:48:53,952 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:53,952 INFO L82 PathProgramCache]: Analyzing trace with hash 896305160, now seen corresponding path program 1 times [2020-12-23 16:48:53,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:53,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179072304] [2020-12-23 16:48:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:54,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179072304] [2020-12-23 16:48:54,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:54,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 16:48:54,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772216402] [2020-12-23 16:48:54,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 16:48:54,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:54,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 16:48:54,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:48:54,149 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 10 states. [2020-12-23 16:48:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:54,452 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-12-23 16:48:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:48:54,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-23 16:48:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:54,454 INFO L225 Difference]: With dead ends: 80 [2020-12-23 16:48:54,454 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 16:48:54,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:48:54,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 16:48:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-12-23 16:48:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 16:48:54,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-12-23 16:48:54,465 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 15 [2020-12-23 16:48:54,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:54,465 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-12-23 16:48:54,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 16:48:54,465 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-12-23 16:48:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:48:54,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:54,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:54,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:48:54,469 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:54,470 INFO L82 PathProgramCache]: Analyzing trace with hash 639793573, now seen corresponding path program 1 times [2020-12-23 16:48:54,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:54,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523033942] [2020-12-23 16:48:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:54,562 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 16:48:54,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523033942] [2020-12-23 16:48:54,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:54,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:48:54,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775332891] [2020-12-23 16:48:54,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:48:54,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:54,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:48:54,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:48:54,564 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 8 states. [2020-12-23 16:48:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:54,741 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-12-23 16:48:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:48:54,742 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-23 16:48:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:54,743 INFO L225 Difference]: With dead ends: 65 [2020-12-23 16:48:54,743 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 16:48:54,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:48:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 16:48:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2020-12-23 16:48:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:48:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-12-23 16:48:54,754 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 17 [2020-12-23 16:48:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:54,754 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-12-23 16:48:54,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:48:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-12-23 16:48:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:48:54,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:54,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:54,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 16:48:54,758 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 639793574, now seen corresponding path program 1 times [2020-12-23 16:48:54,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:54,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134083158] [2020-12-23 16:48:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:54,941 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 16:48:54,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134083158] [2020-12-23 16:48:54,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:54,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 16:48:54,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412668979] [2020-12-23 16:48:54,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 16:48:54,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:54,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 16:48:54,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:48:54,943 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 10 states. [2020-12-23 16:48:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:55,209 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-12-23 16:48:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:48:55,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 16:48:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:55,211 INFO L225 Difference]: With dead ends: 84 [2020-12-23 16:48:55,211 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 16:48:55,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:48:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 16:48:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-12-23 16:48:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 16:48:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-12-23 16:48:55,214 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 17 [2020-12-23 16:48:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:55,215 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-12-23 16:48:55,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 16:48:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-12-23 16:48:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:48:55,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:55,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:55,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 16:48:55,216 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:48:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 639853155, now seen corresponding path program 1 times [2020-12-23 16:48:55,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:55,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58607576] [2020-12-23 16:48:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 16:48:55,233 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 16:48:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 16:48:55,244 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 16:48:55,264 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 16:48:55,265 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 16:48:55,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 16:48:55,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:48:55 BoogieIcfgContainer [2020-12-23 16:48:55,298 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:48:55,299 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:48:55,299 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:48:55,299 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:48:55,300 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:48:51" (3/4) ... [2020-12-23 16:48:55,302 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 16:48:55,348 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/cstrchr_unsafe.i-witness.graphml [2020-12-23 16:48:55,348 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:48:55,349 INFO L168 Benchmark]: Toolchain (without parser) took 5285.42 ms. Allocated memory was 167.8 MB in the beginning and 212.9 MB in the end (delta: 45.1 MB). Free memory was 142.3 MB in the beginning and 185.1 MB in the end (delta: -42.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2020-12-23 16:48:55,350 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 167.8 MB. Free memory is still 142.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:48:55,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 669.73 ms. Allocated memory is still 167.8 MB. Free memory was 142.1 MB in the beginning and 121.4 MB in the end (delta: 20.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-12-23 16:48:55,351 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.76 ms. Allocated memory is still 167.8 MB. Free memory was 121.4 MB in the beginning and 119.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:48:55,352 INFO L168 Benchmark]: Boogie Preprocessor took 32.57 ms. Allocated memory is still 167.8 MB. Free memory was 119.5 MB in the beginning and 118.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:48:55,353 INFO L168 Benchmark]: RCFGBuilder took 703.50 ms. Allocated memory is still 167.8 MB. Free memory was 118.2 MB in the beginning and 140.6 MB in the end (delta: -22.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. [2020-12-23 16:48:55,353 INFO L168 Benchmark]: TraceAbstraction took 3771.16 ms. Allocated memory was 167.8 MB in the beginning and 212.9 MB in the end (delta: 45.1 MB). Free memory was 140.1 MB in the beginning and 187.2 MB in the end (delta: -47.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:48:55,354 INFO L168 Benchmark]: Witness Printer took 48.85 ms. Allocated memory is still 212.9 MB. Free memory was 187.2 MB in the beginning and 185.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:48:55,357 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 167.8 MB. Free memory is still 142.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 669.73 ms. Allocated memory is still 167.8 MB. Free memory was 142.1 MB in the beginning and 121.4 MB in the end (delta: 20.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 51.76 ms. Allocated memory is still 167.8 MB. Free memory was 121.4 MB in the beginning and 119.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.57 ms. Allocated memory is still 167.8 MB. Free memory was 119.5 MB in the beginning and 118.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 703.50 ms. Allocated memory is still 167.8 MB. Free memory was 118.2 MB in the beginning and 140.6 MB in the end (delta: -22.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3771.16 ms. Allocated memory was 167.8 MB in the beginning and 212.9 MB in the end (delta: 45.1 MB). Free memory was 140.1 MB in the beginning and 187.2 MB in the end (delta: -47.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 48.85 ms. Allocated memory is still 212.9 MB. Free memory was 187.2 MB in the beginning and 185.1 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: 537]: 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) [L526] nondetString[length-1] = '\0' [L527] return nondetString; [L536] char* s = build_nondet_String(); [L531] EXPR \read(*s) [L531] *s != '\0' && *s != (char)c [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) [L533] EXPR (*s == c) ? (char *) s : 0 [L533] return ( (*s == c) ? (char *) s : 0 ); - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.6s, OverallIterations: 13, TraceHistogramMax: 2, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 361 SDtfs, 1283 SDslu, 763 SDs, 0 SdLazy, 687 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 194 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 7497 SizeOfPredicates, 3 NumberOfNonLiveVariables, 41 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 13 InterpolantComputations, 11 PerfectInterpolantSequences, 4/7 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...