/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/ldv-memsafety/ArraysOfVariableLength5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:10:43,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:10:43,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:10:43,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:10:43,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:10:43,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:10:43,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:10:43,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:10:43,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:10:43,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:10:43,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:10:43,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:10:43,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:10:43,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:10:43,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:10:43,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:10:43,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:10:43,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:10:43,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:10:43,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:10:43,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:10:43,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:10:43,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:10:43,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:10:43,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 17:10:43,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 17:10:43,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 17:10:43,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 17:10:43,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 17:10:43,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 17:10:43,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 17:10:43,766 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 17:10:43,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 17:10:43,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:10:43,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:10:43,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:10:43,769 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 17:10:43,801 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:10:43,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:10:43,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:10:43,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:10:43,804 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:10:43,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:10:43,805 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:10:43,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:10:43,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:10:43,806 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:10:43,806 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:10:43,806 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:10:43,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:10:43,807 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:10:43,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:10:43,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:10:43,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:10:43,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:10:43,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:10:43,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:10:43,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:10:43,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:10:43,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:10:43,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:10:43,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:10:44,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:10:44,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:10:44,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:10:44,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:10:44,371 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:10:44,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-12-23 17:10:44,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cef5a0ac8/5f65c3996a6f423482232f23d3caf8fa/FLAG0f49779cb [2020-12-23 17:10:45,159 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:10:45,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-12-23 17:10:45,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cef5a0ac8/5f65c3996a6f423482232f23d3caf8fa/FLAG0f49779cb [2020-12-23 17:10:45,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cef5a0ac8/5f65c3996a6f423482232f23d3caf8fa [2020-12-23 17:10:45,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:10:45,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:10:45,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:10:45,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:10:45,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:10:45,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2b607b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45, skipping insertion in model container [2020-12-23 17:10:45,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:10:45,541 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2020-12-23 17:10:45,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:10:45,734 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2020-12-23 17:10:45,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:10:45,777 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:10:45,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45 WrapperNode [2020-12-23 17:10:45,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:10:45,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:10:45,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:10:45,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:10:45,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:10:45,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:10:45,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:10:45,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:10:45,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (1/1) ... [2020-12-23 17:10:45,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:10:45,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:10:45,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:10:45,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:10:45,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (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 17:10:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:10:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:10:45,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:10:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 17:10:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:10:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:10:46,547 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:10:46,547 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 17:10:46,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:10:46 BoogieIcfgContainer [2020-12-23 17:10:46,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:10:46,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:10:46,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:10:46,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:10:46,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:10:45" (1/3) ... [2020-12-23 17:10:46,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b4e760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:10:46, skipping insertion in model container [2020-12-23 17:10:46,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:45" (2/3) ... [2020-12-23 17:10:46,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b4e760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:10:46, skipping insertion in model container [2020-12-23 17:10:46,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:10:46" (3/3) ... [2020-12-23 17:10:46,621 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2020-12-23 17:10:46,639 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:10:46,645 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-23 17:10:46,670 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-23 17:10:46,700 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:10:46,701 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:10:46,701 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:10:46,701 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:10:46,701 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:10:46,701 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:10:46,702 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:10:46,702 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:10:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-12-23 17:10:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 17:10:46,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:46,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 17:10:46,732 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:46,740 INFO L82 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2020-12-23 17:10:46,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:46,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333182101] [2020-12-23 17:10:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:46,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333182101] [2020-12-23 17:10:46,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:46,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 17:10:46,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875454055] [2020-12-23 17:10:47,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:47,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:47,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:47,024 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2020-12-23 17:10:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:47,160 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-12-23 17:10:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:10:47,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-23 17:10:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:47,174 INFO L225 Difference]: With dead ends: 76 [2020-12-23 17:10:47,174 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 17:10:47,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:10:47,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 17:10:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 32. [2020-12-23 17:10:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 17:10:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 17:10:47,222 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 5 [2020-12-23 17:10:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:47,222 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 17:10:47,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 17:10:47,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 17:10:47,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:47,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:47,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:10:47,225 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:47,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2020-12-23 17:10:47,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:47,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207133267] [2020-12-23 17:10:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:47,283 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 17:10:47,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207133267] [2020-12-23 17:10:47,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:47,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:10:47,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443119174] [2020-12-23 17:10:47,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:47,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:47,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:47,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:10:47,288 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 3 states. [2020-12-23 17:10:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:47,311 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-12-23 17:10:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:47,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 17:10:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:47,313 INFO L225 Difference]: With dead ends: 30 [2020-12-23 17:10:47,313 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 17:10:47,314 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 17:10:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 17:10:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 17:10:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 17:10:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-23 17:10:47,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 7 [2020-12-23 17:10:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:47,320 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-23 17:10:47,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-23 17:10:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 17:10:47,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:47,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:47,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:10:47,322 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1809810360, now seen corresponding path program 1 times [2020-12-23 17:10:47,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:47,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098355940] [2020-12-23 17:10:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:47,428 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 17:10:47,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098355940] [2020-12-23 17:10:47,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:47,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:10:47,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200169034] [2020-12-23 17:10:47,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:47,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:47,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:47,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:47,440 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2020-12-23 17:10:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:47,525 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-23 17:10:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:47,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 17:10:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:47,531 INFO L225 Difference]: With dead ends: 35 [2020-12-23 17:10:47,532 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 17:10:47,532 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 17:10:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 17:10:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-12-23 17:10:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 17:10:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-23 17:10:47,553 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2020-12-23 17:10:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:47,554 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-23 17:10:47,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:47,559 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-23 17:10:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 17:10:47,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:47,562 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:47,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 17:10:47,562 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:47,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:47,565 INFO L82 PathProgramCache]: Analyzing trace with hash -352773613, now seen corresponding path program 1 times [2020-12-23 17:10:47,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:47,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640686064] [2020-12-23 17:10:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:47,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640686064] [2020-12-23 17:10:47,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:47,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:10:47,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300923117] [2020-12-23 17:10:47,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:47,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:47,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:47,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:10:47,656 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 3 states. [2020-12-23 17:10:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:47,690 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-12-23 17:10:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:47,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 17:10:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:47,692 INFO L225 Difference]: With dead ends: 58 [2020-12-23 17:10:47,692 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 17:10:47,693 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 17:10:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 17:10:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2020-12-23 17:10:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 17:10:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-23 17:10:47,699 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 12 [2020-12-23 17:10:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:47,700 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-23 17:10:47,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-23 17:10:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 17:10:47,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:47,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:47,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 17:10:47,702 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1948884381, now seen corresponding path program 1 times [2020-12-23 17:10:47,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:47,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381342959] [2020-12-23 17:10:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:47,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381342959] [2020-12-23 17:10:47,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071789377] [2020-12-23 17:10:47,751 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 17:10:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:47,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 17:10:47,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:47,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:47,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 17:10:47,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221217963] [2020-12-23 17:10:47,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:10:47,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:47,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:10:47,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:10:47,891 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 5 states. [2020-12-23 17:10:47,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:47,953 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-12-23 17:10:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:47,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 17:10:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:47,954 INFO L225 Difference]: With dead ends: 69 [2020-12-23 17:10:47,955 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 17:10:47,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:10:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 17:10:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2020-12-23 17:10:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 17:10:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-23 17:10:47,961 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 13 [2020-12-23 17:10:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:47,961 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-23 17:10:47,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:10:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-23 17:10:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 17:10:47,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:47,962 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:48,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:48,177 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1948919938, now seen corresponding path program 1 times [2020-12-23 17:10:48,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:48,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405596771] [2020-12-23 17:10:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:48,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405596771] [2020-12-23 17:10:48,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692707488] [2020-12-23 17:10:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:48,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:10:48,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:48,376 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-23 17:10:48,377 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:10:48,379 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:48,385 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:48,388 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:10:48,388 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-12-23 17:10:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:48,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:48,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-23 17:10:48,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512878440] [2020-12-23 17:10:48,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:48,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:48,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:48,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:48,415 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 4 states. [2020-12-23 17:10:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:48,446 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-12-23 17:10:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:48,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 17:10:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:48,447 INFO L225 Difference]: With dead ends: 41 [2020-12-23 17:10:48,448 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 17:10:48,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:10:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 17:10:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 17:10:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 17:10:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-12-23 17:10:48,453 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 13 [2020-12-23 17:10:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:48,453 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-12-23 17:10:48,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-12-23 17:10:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 17:10:48,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:48,454 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:48,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:48,669 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1948919939, now seen corresponding path program 1 times [2020-12-23 17:10:48,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:48,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196172664] [2020-12-23 17:10:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:48,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196172664] [2020-12-23 17:10:48,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707172889] [2020-12-23 17:10:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:48,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 17:10:48,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:48,880 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:48,881 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 17:10:48,885 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:48,903 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 17:10:48,907 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:10:48,907 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-23 17:10:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:48,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:48,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-23 17:10:48,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210420870] [2020-12-23 17:10:48,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:48,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:48,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:48,936 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 4 states. [2020-12-23 17:10:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:49,001 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-23 17:10:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:10:49,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 17:10:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:49,003 INFO L225 Difference]: With dead ends: 66 [2020-12-23 17:10:49,003 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 17:10:49,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:10:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 17:10:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2020-12-23 17:10:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 17:10:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-23 17:10:49,008 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 13 [2020-12-23 17:10:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:49,008 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-23 17:10:49,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-23 17:10:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 17:10:49,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:49,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:49,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:49,224 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash 286926307, now seen corresponding path program 1 times [2020-12-23 17:10:49,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:49,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875936166] [2020-12-23 17:10:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:49,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875936166] [2020-12-23 17:10:49,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725640996] [2020-12-23 17:10:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:49,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:10:49,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:49,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:49,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-23 17:10:49,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580952833] [2020-12-23 17:10:49,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 17:10:49,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:49,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 17:10:49,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:49,434 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 7 states. [2020-12-23 17:10:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:49,561 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-12-23 17:10:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:10:49,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-23 17:10:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:49,566 INFO L225 Difference]: With dead ends: 48 [2020-12-23 17:10:49,566 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 17:10:49,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:10:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 17:10:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-12-23 17:10:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 17:10:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-23 17:10:49,582 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 14 [2020-12-23 17:10:49,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:49,582 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-23 17:10:49,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 17:10:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-23 17:10:49,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:10:49,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:49,584 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:49,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:49,801 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1980019516, now seen corresponding path program 1 times [2020-12-23 17:10:49,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:49,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394307036] [2020-12-23 17:10:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:49,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394307036] [2020-12-23 17:10:49,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727785244] [2020-12-23 17:10:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:49,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:49,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:50,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:50,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 17:10:50,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691259393] [2020-12-23 17:10:50,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 17:10:50,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:50,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 17:10:50,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:10:50,013 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 9 states. [2020-12-23 17:10:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:50,257 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-12-23 17:10:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 17:10:50,257 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-23 17:10:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:50,258 INFO L225 Difference]: With dead ends: 92 [2020-12-23 17:10:50,258 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 17:10:50,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-23 17:10:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 17:10:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 48. [2020-12-23 17:10:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 17:10:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-23 17:10:50,268 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 17 [2020-12-23 17:10:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:50,268 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-23 17:10:50,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 17:10:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-23 17:10:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 17:10:50,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:50,269 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:50,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:50,485 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -128290732, now seen corresponding path program 1 times [2020-12-23 17:10:50,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:50,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160040707] [2020-12-23 17:10:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:50,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160040707] [2020-12-23 17:10:50,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440503926] [2020-12-23 17:10:50,570 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:50,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 17:10:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:50,634 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_11|], 1=[|v_#valid_21|]} [2020-12-23 17:10:50,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:50,640 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:10:50,642 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:50,658 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:50,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:50,666 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-23 17:10:50,668 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:50,683 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:50,685 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:10:50,685 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-23 17:10:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:50,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:50,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-23 17:10:50,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95176969] [2020-12-23 17:10:50,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:10:50,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:50,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:10:50,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:10:50,818 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-12-23 17:10:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:50,898 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-12-23 17:10:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:50,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-23 17:10:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:50,900 INFO L225 Difference]: With dead ends: 53 [2020-12-23 17:10:50,900 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 17:10:50,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:10:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 17:10:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-12-23 17:10:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 17:10:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-12-23 17:10:50,904 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 19 [2020-12-23 17:10:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:50,905 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-12-23 17:10:50,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:10:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-12-23 17:10:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 17:10:50,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:50,906 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:51,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:51,120 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:51,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1206934215, now seen corresponding path program 1 times [2020-12-23 17:10:51,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:51,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240575303] [2020-12-23 17:10:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 17:10:51,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240575303] [2020-12-23 17:10:51,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772284477] [2020-12-23 17:10:51,241 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:51,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 17:10:51,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:51,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:51,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2020-12-23 17:10:51,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263640337] [2020-12-23 17:10:51,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:10:51,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:51,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:10:51,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:10:51,371 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 8 states. [2020-12-23 17:10:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:51,516 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-12-23 17:10:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 17:10:51,517 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-23 17:10:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:51,518 INFO L225 Difference]: With dead ends: 88 [2020-12-23 17:10:51,518 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 17:10:51,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:10:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 17:10:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2020-12-23 17:10:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 17:10:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-12-23 17:10:51,522 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 25 [2020-12-23 17:10:51,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:51,523 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-12-23 17:10:51,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:10:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-12-23 17:10:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 17:10:51,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:51,524 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2020-12-23 17:10:51,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:51,738 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:51,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:51,739 INFO L82 PathProgramCache]: Analyzing trace with hash -702798240, now seen corresponding path program 2 times [2020-12-23 17:10:51,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:51,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911672577] [2020-12-23 17:10:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 17:10:51,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911672577] [2020-12-23 17:10:51,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189337264] [2020-12-23 17:10:51,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:51,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:10:51,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:51,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:10:51,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:51,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:51,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7] total 8 [2020-12-23 17:10:51,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251418855] [2020-12-23 17:10:51,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 17:10:51,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:51,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 17:10:51,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:10:51,981 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 9 states. [2020-12-23 17:10:52,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:52,428 INFO L93 Difference]: Finished difference Result 178 states and 188 transitions. [2020-12-23 17:10:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 17:10:52,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 17:10:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:52,430 INFO L225 Difference]: With dead ends: 178 [2020-12-23 17:10:52,431 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 17:10:52,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-12-23 17:10:52,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 17:10:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 70. [2020-12-23 17:10:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 17:10:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-12-23 17:10:52,437 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 29 [2020-12-23 17:10:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:52,437 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-12-23 17:10:52,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 17:10:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-12-23 17:10:52,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 17:10:52,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:52,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2020-12-23 17:10:52,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 17:10:52,655 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:52,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:52,656 INFO L82 PathProgramCache]: Analyzing trace with hash -311908906, now seen corresponding path program 1 times [2020-12-23 17:10:52,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:52,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049557324] [2020-12-23 17:10:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 17:10:52,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049557324] [2020-12-23 17:10:52,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408074775] [2020-12-23 17:10:52,773 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:52,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 17:10:52,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:52,901 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:52,902 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 17:10:52,905 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:52,931 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 17:10:52,937 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:10:52,937 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-23 17:10:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 17:10:53,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:53,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 17:10:53,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879198144] [2020-12-23 17:10:53,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 17:10:53,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 17:10:53,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:53,030 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 7 states. [2020-12-23 17:10:53,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:53,189 INFO L93 Difference]: Finished difference Result 135 states and 156 transitions. [2020-12-23 17:10:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:10:53,189 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-12-23 17:10:53,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:53,190 INFO L225 Difference]: With dead ends: 135 [2020-12-23 17:10:53,191 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 17:10:53,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:10:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 17:10:53,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 72. [2020-12-23 17:10:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 17:10:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-12-23 17:10:53,196 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 30 [2020-12-23 17:10:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:53,196 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-12-23 17:10:53,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 17:10:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-12-23 17:10:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 17:10:53,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:53,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2020-12-23 17:10:53,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:53,412 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1079291152, now seen corresponding path program 2 times [2020-12-23 17:10:53,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:53,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568957495] [2020-12-23 17:10:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:53,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568957495] [2020-12-23 17:10:53,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301602977] [2020-12-23 17:10:53,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:53,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:10:53,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:53,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:10:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:53,633 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_22|]} [2020-12-23 17:10:53,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:53,641 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:10:53,644 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:53,654 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:53,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:53,660 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-23 17:10:53,663 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:53,671 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:53,673 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:10:53,674 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-23 17:10:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 17:10:53,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:53,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2020-12-23 17:10:53,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663303594] [2020-12-23 17:10:53,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:10:53,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:53,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:10:53,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:10:53,921 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 6 states. [2020-12-23 17:10:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:54,056 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-12-23 17:10:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:10:54,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-12-23 17:10:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:54,059 INFO L225 Difference]: With dead ends: 73 [2020-12-23 17:10:54,060 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 17:10:54,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:10:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 17:10:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-12-23 17:10:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 17:10:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-12-23 17:10:54,064 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 31 [2020-12-23 17:10:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:54,065 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-12-23 17:10:54,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:10:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-12-23 17:10:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 17:10:54,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:54,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:54,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:54,281 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1980079665, now seen corresponding path program 1 times [2020-12-23 17:10:54,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:54,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457016922] [2020-12-23 17:10:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 17:10:54,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457016922] [2020-12-23 17:10:54,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625537779] [2020-12-23 17:10:54,376 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:10:54,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:10:54,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:54,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-12-23 17:10:54,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130408589] [2020-12-23 17:10:54,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:10:54,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:54,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:10:54,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:10:54,559 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 11 states. [2020-12-23 17:10:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:54,926 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2020-12-23 17:10:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 17:10:54,926 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-12-23 17:10:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:54,927 INFO L225 Difference]: With dead ends: 128 [2020-12-23 17:10:54,928 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 17:10:54,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-12-23 17:10:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 17:10:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 86. [2020-12-23 17:10:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 17:10:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2020-12-23 17:10:54,932 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 40 [2020-12-23 17:10:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:54,933 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2020-12-23 17:10:54,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:10:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2020-12-23 17:10:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 17:10:54,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:54,935 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2020-12-23 17:10:55,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 17:10:55,150 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:55,151 INFO L82 PathProgramCache]: Analyzing trace with hash 190094419, now seen corresponding path program 3 times [2020-12-23 17:10:55,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:55,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218236681] [2020-12-23 17:10:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 13 proven. 111 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 17:10:55,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218236681] [2020-12-23 17:10:55,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523116715] [2020-12-23 17:10:55,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:55,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 17:10:55,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:55,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:55,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 72 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 17:10:55,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:55,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 14 [2020-12-23 17:10:55,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424250292] [2020-12-23 17:10:55,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 17:10:55,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:55,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 17:10:55,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:10:55,621 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 14 states. [2020-12-23 17:10:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:56,239 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2020-12-23 17:10:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 17:10:56,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-12-23 17:10:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:56,240 INFO L225 Difference]: With dead ends: 121 [2020-12-23 17:10:56,241 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 17:10:56,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2020-12-23 17:10:56,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 17:10:56,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-12-23 17:10:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 17:10:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-12-23 17:10:56,247 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 56 [2020-12-23 17:10:56,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:56,247 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-12-23 17:10:56,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 17:10:56,247 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-12-23 17:10:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 17:10:56,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:56,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:56,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 17:10:56,464 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash 139155595, now seen corresponding path program 2 times [2020-12-23 17:10:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:56,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699641290] [2020-12-23 17:10:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 17:10:56,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699641290] [2020-12-23 17:10:56,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625209815] [2020-12-23 17:10:56,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:56,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:10:56,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:56,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:10:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-23 17:10:56,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:56,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-23 17:10:56,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805616461] [2020-12-23 17:10:56,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:56,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:56,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:56,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:10:56,860 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 4 states. [2020-12-23 17:10:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:56,894 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-12-23 17:10:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:56,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-12-23 17:10:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:56,896 INFO L225 Difference]: With dead ends: 94 [2020-12-23 17:10:56,896 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 17:10:56,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:10:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 17:10:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-23 17:10:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 17:10:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-23 17:10:56,905 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 62 [2020-12-23 17:10:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:56,905 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-23 17:10:56,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-23 17:10:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 17:10:56,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:56,911 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:57,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 17:10:57,126 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:57,127 INFO L82 PathProgramCache]: Analyzing trace with hash 18978652, now seen corresponding path program 1 times [2020-12-23 17:10:57,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:57,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12508364] [2020-12-23 17:10:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 17:10:57,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12508364] [2020-12-23 17:10:57,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497785663] [2020-12-23 17:10:57,263 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:57,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 17:10:57,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 59 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 17:10:57,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:57,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2020-12-23 17:10:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937287114] [2020-12-23 17:10:57,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 17:10:57,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 17:10:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:10:57,512 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 14 states. [2020-12-23 17:10:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:57,930 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-12-23 17:10:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 17:10:57,931 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-12-23 17:10:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:57,932 INFO L225 Difference]: With dead ends: 120 [2020-12-23 17:10:57,932 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 17:10:57,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-23 17:10:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 17:10:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 91. [2020-12-23 17:10:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 17:10:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-12-23 17:10:57,936 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 63 [2020-12-23 17:10:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:57,936 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-12-23 17:10:57,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 17:10:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-12-23 17:10:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 17:10:57,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:57,938 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:58,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:58,154 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:58,155 INFO L82 PathProgramCache]: Analyzing trace with hash 561224903, now seen corresponding path program 2 times [2020-12-23 17:10:58,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:58,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848373949] [2020-12-23 17:10:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 17:10:58,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848373949] [2020-12-23 17:10:58,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641308842] [2020-12-23 17:10:58,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:58,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:10:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:58,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 17:10:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 144 proven. 130 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 17:10:58,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:58,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2020-12-23 17:10:58,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841649326] [2020-12-23 17:10:58,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 17:10:58,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:58,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 17:10:58,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 17:10:58,579 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 17 states. [2020-12-23 17:10:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:59,117 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2020-12-23 17:10:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 17:10:59,118 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2020-12-23 17:10:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:59,119 INFO L225 Difference]: With dead ends: 161 [2020-12-23 17:10:59,119 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 17:10:59,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 17:10:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 17:10:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-12-23 17:10:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 17:10:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-12-23 17:10:59,125 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 90 [2020-12-23 17:10:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:59,126 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-12-23 17:10:59,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 17:10:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-12-23 17:10:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 17:10:59,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:59,127 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:59,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:59,342 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:59,343 INFO L82 PathProgramCache]: Analyzing trace with hash -926083349, now seen corresponding path program 3 times [2020-12-23 17:10:59,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:59,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777009351] [2020-12-23 17:10:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 556 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-23 17:10:59,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777009351] [2020-12-23 17:10:59,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876002165] [2020-12-23 17:10:59,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:59,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 17:10:59,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:59,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:10:59,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:59,547 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_25|]} [2020-12-23 17:10:59,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:59,552 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:10:59,553 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:59,561 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:59,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:59,565 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-23 17:10:59,566 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:59,572 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:59,573 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:10:59,573 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 17:11:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-12-23 17:11:00,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:11:00,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2020-12-23 17:11:00,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850669031] [2020-12-23 17:11:00,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:11:00,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:00,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:11:00,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:11:00,094 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 6 states. [2020-12-23 17:11:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:00,136 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-12-23 17:11:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:11:00,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-12-23 17:11:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:00,137 INFO L225 Difference]: With dead ends: 122 [2020-12-23 17:11:00,137 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 17:11:00,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:11:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 17:11:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 17:11:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 17:11:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 17:11:00,138 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 122 [2020-12-23 17:11:00,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:00,139 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 17:11:00,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:11:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 17:11:00,139 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 17:11:00,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:00,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:11:00 BoogieIcfgContainer [2020-12-23 17:11:00,362 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:11:00,363 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:11:00,363 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:11:00,363 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:11:00,364 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:10:46" (3/4) ... [2020-12-23 17:11:00,368 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 17:11:00,385 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-23 17:11:00,385 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 17:11:00,385 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 17:11:00,432 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-memsafety/ArraysOfVariableLength5.c-witness.graphml [2020-12-23 17:11:00,432 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:11:00,433 INFO L168 Benchmark]: Toolchain (without parser) took 14933.51 ms. Allocated memory was 159.4 MB in the beginning and 291.5 MB in the end (delta: 132.1 MB). Free memory was 134.5 MB in the beginning and 178.3 MB in the end (delta: -43.8 MB). Peak memory consumption was 89.2 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:00,433 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 159.4 MB. Free memory is still 133.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:11:00,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.50 ms. Allocated memory is still 159.4 MB. Free memory was 134.3 MB in the beginning and 125.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:00,437 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.14 ms. Allocated memory is still 159.4 MB. Free memory was 125.3 MB in the beginning and 123.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:00,437 INFO L168 Benchmark]: Boogie Preprocessor took 31.39 ms. Allocated memory is still 159.4 MB. Free memory was 123.8 MB in the beginning and 122.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:00,438 INFO L168 Benchmark]: RCFGBuilder took 702.21 ms. Allocated memory is still 159.4 MB. Free memory was 122.5 MB in the beginning and 140.6 MB in the end (delta: -18.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:00,438 INFO L168 Benchmark]: TraceAbstraction took 13775.45 ms. Allocated memory was 159.4 MB in the beginning and 291.5 MB in the end (delta: 132.1 MB). Free memory was 140.1 MB in the beginning and 180.7 MB in the end (delta: -40.6 MB). Peak memory consumption was 91.3 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:00,439 INFO L168 Benchmark]: Witness Printer took 69.11 ms. Allocated memory is still 291.5 MB. Free memory was 180.7 MB in the beginning and 178.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:00,444 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 159.4 MB. Free memory is still 133.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.50 ms. Allocated memory is still 159.4 MB. Free memory was 134.3 MB in the beginning and 125.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.14 ms. Allocated memory is still 159.4 MB. Free memory was 125.3 MB in the beginning and 123.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.39 ms. Allocated memory is still 159.4 MB. Free memory was 123.8 MB in the beginning and 122.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 702.21 ms. Allocated memory is still 159.4 MB. Free memory was 122.5 MB in the beginning and 140.6 MB in the end (delta: -18.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13775.45 ms. Allocated memory was 159.4 MB in the beginning and 291.5 MB in the end (delta: 132.1 MB). Free memory was 140.1 MB in the beginning and 180.7 MB in the end (delta: -40.6 MB). Peak memory consumption was 91.3 MB. Max. memory is 8.0 GB. * Witness Printer took 69.11 ms. Allocated memory is still 291.5 MB. Free memory was 180.7 MB in the beginning and 178.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.6s, OverallIterations: 20, TraceHistogramMax: 14, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 423 SDtfs, 2306 SDslu, 857 SDs, 0 SdLazy, 1828 SolverSat, 341 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 814 GetRequests, 604 SyntacticMatches, 3 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=123occurred in iteration=19, 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, 20 MinimizatonAttempts, 502 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 1305 NumberOfCodeBlocks, 1108 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1269 ConstructedInterpolants, 159 QuantifiedInterpolants, 521321 SizeOfPredicates, 54 NumberOfNonLiveVariables, 1965 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 36 InterpolantComputations, 7 PerfectInterpolantSequences, 1465/2934 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...