/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/list-ext-properties/960521-1_1-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:07:18,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:07:18,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:07:18,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:07:18,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:07:18,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:07:18,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:07:18,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:07:18,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:07:18,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:07:18,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:07:18,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:07:18,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:07:18,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:07:18,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:07:18,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:07:18,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:07:18,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:07:18,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:07:18,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:07:18,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:07:18,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:07:18,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:07:18,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:07:18,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 17:07:18,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 17:07:18,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 17:07:18,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 17:07:18,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 17:07:18,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 17:07:18,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 17:07:18,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 17:07:18,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 17:07:18,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:07:18,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:07:18,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:07:18,192 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 17:07:18,248 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:07:18,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:07:18,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:07:18,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:07:18,252 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:07:18,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:07:18,252 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:07:18,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:07:18,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:07:18,253 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:07:18,253 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:07:18,254 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:07:18,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:07:18,255 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:07:18,255 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:07:18,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:07:18,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:07:18,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:07:18,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:07:18,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:07:18,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:07:18,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:07:18,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:07:18,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:07:18,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:07:18,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:07:18,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:07:18,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:07:18,653 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:07:18,655 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:07:18,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2020-12-23 17:07:18,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/94f438cd5/1ae1b89784e64d0fa1cec6848570bed1/FLAG1f111dd25 [2020-12-23 17:07:19,444 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:07:19,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2020-12-23 17:07:19,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/94f438cd5/1ae1b89784e64d0fa1cec6848570bed1/FLAG1f111dd25 [2020-12-23 17:07:19,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/94f438cd5/1ae1b89784e64d0fa1cec6848570bed1 [2020-12-23 17:07:19,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:07:19,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:07:19,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:07:19,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:07:19,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:07:19,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:07:19" (1/1) ... [2020-12-23 17:07:19,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da1595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:19, skipping insertion in model container [2020-12-23 17:07:19,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:07:19" (1/1) ... [2020-12-23 17:07:19,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:07:19,792 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post11,] [2020-12-23 17:07:20,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:07:20,119 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post11,] [2020-12-23 17:07:20,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:07:20,238 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:07:20,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20 WrapperNode [2020-12-23 17:07:20,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:07:20,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:07:20,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:07:20,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:07:20,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (1/1) ... [2020-12-23 17:07:20,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (1/1) ... [2020-12-23 17:07:20,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:07:20,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:07:20,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:07:20,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:07:20,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (1/1) ... [2020-12-23 17:07:20,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (1/1) ... [2020-12-23 17:07:20,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (1/1) ... [2020-12-23 17:07:20,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (1/1) ... [2020-12-23 17:07:20,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (1/1) ... [2020-12-23 17:07:20,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (1/1) ... [2020-12-23 17:07:20,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (1/1) ... [2020-12-23 17:07:20,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:07:20,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:07:20,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:07:20,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:07:20,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (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 17:07:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 17:07:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:07:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 17:07:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:07:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:07:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 17:07:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:07:20,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:07:20,871 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:07:20,871 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 17:07:20,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:07:20 BoogieIcfgContainer [2020-12-23 17:07:20,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:07:20,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:07:20,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:07:20,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:07:20,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:07:19" (1/3) ... [2020-12-23 17:07:20,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc08395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:07:20, skipping insertion in model container [2020-12-23 17:07:20,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:20" (2/3) ... [2020-12-23 17:07:20,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc08395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:07:20, skipping insertion in model container [2020-12-23 17:07:20,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:07:20" (3/3) ... [2020-12-23 17:07:20,902 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2020-12-23 17:07:20,913 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:07:20,919 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2020-12-23 17:07:20,938 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2020-12-23 17:07:20,974 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:07:20,974 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:07:20,974 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:07:20,974 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:07:20,976 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:07:20,976 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:07:20,977 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:07:20,977 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:07:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-12-23 17:07:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 17:07:21,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:21,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 17:07:21,014 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:21,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash 28702701, now seen corresponding path program 1 times [2020-12-23 17:07:21,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:21,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593881214] [2020-12-23 17:07:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:21,253 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 17:07:21,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593881214] [2020-12-23 17:07:21,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:21,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:07:21,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859147161] [2020-12-23 17:07:21,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 17:07:21,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 17:07:21,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 17:07:21,278 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 2 states. [2020-12-23 17:07:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:21,294 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-12-23 17:07:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 17:07:21,296 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-23 17:07:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:21,304 INFO L225 Difference]: With dead ends: 53 [2020-12-23 17:07:21,305 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 17:07:21,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 17:07:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 17:07:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 17:07:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 17:07:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-12-23 17:07:21,348 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 5 [2020-12-23 17:07:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:21,349 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-12-23 17:07:21,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 17:07:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-12-23 17:07:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:07:21,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:21,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:07:21,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:07:21,350 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash 889569384, now seen corresponding path program 1 times [2020-12-23 17:07:21,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:21,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078834010] [2020-12-23 17:07:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:21,452 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 17:07:21,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078834010] [2020-12-23 17:07:21,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:21,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:07:21,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697332884] [2020-12-23 17:07:21,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:07:21,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:21,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:07:21,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:07:21,459 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 3 states. [2020-12-23 17:07:21,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:21,543 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-12-23 17:07:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:07:21,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 17:07:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:21,545 INFO L225 Difference]: With dead ends: 50 [2020-12-23 17:07:21,545 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 17:07:21,546 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 17:07:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 17:07:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 17:07:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 17:07:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-23 17:07:21,553 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 6 [2020-12-23 17:07:21,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:21,553 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-23 17:07:21,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:07:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-23 17:07:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:07:21,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:21,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:07:21,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:07:21,555 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:21,556 INFO L82 PathProgramCache]: Analyzing trace with hash 889569385, now seen corresponding path program 1 times [2020-12-23 17:07:21,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:21,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421322402] [2020-12-23 17:07:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:21,623 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 17:07:21,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421322402] [2020-12-23 17:07:21,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:21,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:07:21,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482401049] [2020-12-23 17:07:21,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:07:21,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:21,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:07:21,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:07:21,626 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 4 states. [2020-12-23 17:07:21,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:21,703 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2020-12-23 17:07:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:07:21,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 17:07:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:21,706 INFO L225 Difference]: With dead ends: 97 [2020-12-23 17:07:21,706 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 17:07:21,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:07:21,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 17:07:21,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2020-12-23 17:07:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 17:07:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-12-23 17:07:21,716 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 6 [2020-12-23 17:07:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:21,717 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-12-23 17:07:21,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:07:21,717 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-12-23 17:07:21,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 17:07:21,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:21,718 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:21,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 17:07:21,718 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:21,719 INFO L82 PathProgramCache]: Analyzing trace with hash 179257870, now seen corresponding path program 1 times [2020-12-23 17:07:21,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:21,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740532553] [2020-12-23 17:07:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:21,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740532553] [2020-12-23 17:07:21,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307996504] [2020-12-23 17:07:21,783 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 17:07:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:21,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 17:07:21,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:21,965 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 17:07:21,966 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 17:07:21,968 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:21,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:21,988 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:21,989 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-23 17:07:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:22,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:07:22,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-23 17:07:22,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636692673] [2020-12-23 17:07:22,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:07:22,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:22,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:07:22,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:07:22,026 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 5 states. [2020-12-23 17:07:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:22,141 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-12-23 17:07:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:07:22,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 17:07:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:22,143 INFO L225 Difference]: With dead ends: 96 [2020-12-23 17:07:22,143 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 17:07:22,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 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 17:07:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 17:07:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 49. [2020-12-23 17:07:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 17:07:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-23 17:07:22,151 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 8 [2020-12-23 17:07:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:22,151 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-23 17:07:22,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:07:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-23 17:07:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 17:07:22,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:22,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:22,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:22,368 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:22,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1213292751, now seen corresponding path program 1 times [2020-12-23 17:07:22,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:22,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487991209] [2020-12-23 17:07:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:22,428 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 17:07:22,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487991209] [2020-12-23 17:07:22,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:22,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:07:22,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861407337] [2020-12-23 17:07:22,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:07:22,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:22,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:07:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:07:22,431 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 4 states. [2020-12-23 17:07:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:22,470 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-12-23 17:07:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:07:22,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 17:07:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:22,471 INFO L225 Difference]: With dead ends: 46 [2020-12-23 17:07:22,472 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 17:07:22,472 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 17:07:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 17:07:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 17:07:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 17:07:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-12-23 17:07:22,477 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 9 [2020-12-23 17:07:22,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:22,478 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-12-23 17:07:22,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:07:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-12-23 17:07:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 17:07:22,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:22,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:22,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 17:07:22,480 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:22,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1213292752, now seen corresponding path program 1 times [2020-12-23 17:07:22,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:22,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383008243] [2020-12-23 17:07:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:22,593 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 17:07:22,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383008243] [2020-12-23 17:07:22,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:22,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 17:07:22,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479454997] [2020-12-23 17:07:22,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:07:22,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:22,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:07:22,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:07:22,597 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 6 states. [2020-12-23 17:07:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:22,705 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-12-23 17:07:22,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:07:22,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-23 17:07:22,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:22,707 INFO L225 Difference]: With dead ends: 86 [2020-12-23 17:07:22,707 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 17:07:22,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:07:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 17:07:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2020-12-23 17:07:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 17:07:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-12-23 17:07:22,720 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 9 [2020-12-23 17:07:22,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:22,720 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-12-23 17:07:22,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:07:22,720 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-12-23 17:07:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 17:07:22,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:22,724 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:22,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 17:07:22,725 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:22,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1626816779, now seen corresponding path program 1 times [2020-12-23 17:07:22,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:22,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054187369] [2020-12-23 17:07:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:22,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054187369] [2020-12-23 17:07:22,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578224608] [2020-12-23 17:07:22,844 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 17:07:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:22,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 17:07:22,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:23,020 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 17:07:23,022 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 17:07:23,025 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:23,036 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:23,055 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:23,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-23 17:07:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:23,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:07:23,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-12-23 17:07:23,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048417582] [2020-12-23 17:07:23,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:07:23,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:23,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:07:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:07:23,145 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 6 states. [2020-12-23 17:07:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:23,352 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-12-23 17:07:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:07:23,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 17:07:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:23,354 INFO L225 Difference]: With dead ends: 92 [2020-12-23 17:07:23,354 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 17:07:23,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:07:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 17:07:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 59. [2020-12-23 17:07:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 17:07:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-12-23 17:07:23,361 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2020-12-23 17:07:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:23,361 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-12-23 17:07:23,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:07:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-12-23 17:07:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 17:07:23,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:23,363 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:23,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:23,576 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:23,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1240415274, now seen corresponding path program 1 times [2020-12-23 17:07:23,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:23,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636785334] [2020-12-23 17:07:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:23,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636785334] [2020-12-23 17:07:23,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688438480] [2020-12-23 17:07:23,665 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 17:07:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:23,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 17:07:23,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:23,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:07:23,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-23 17:07:23,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557524154] [2020-12-23 17:07:23,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:07:23,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:23,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:07:23,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:07:23,787 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 5 states. [2020-12-23 17:07:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:23,837 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-12-23 17:07:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:07:23,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-23 17:07:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:23,842 INFO L225 Difference]: With dead ends: 85 [2020-12-23 17:07:23,842 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 17:07:23,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:07:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 17:07:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-12-23 17:07:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 17:07:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-12-23 17:07:23,863 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 12 [2020-12-23 17:07:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:23,863 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-12-23 17:07:23,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:07:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-12-23 17:07:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 17:07:23,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:23,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:24,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:24,080 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:24,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1961777546, now seen corresponding path program 1 times [2020-12-23 17:07:24,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:24,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260361038] [2020-12-23 17:07:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:07:24,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260361038] [2020-12-23 17:07:24,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:24,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:07:24,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85365371] [2020-12-23 17:07:24,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:07:24,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:24,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:07:24,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:07:24,158 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 4 states. [2020-12-23 17:07:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:24,208 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-12-23 17:07:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:07:24,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 17:07:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:24,209 INFO L225 Difference]: With dead ends: 56 [2020-12-23 17:07:24,209 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 17:07:24,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:07:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 17:07:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 17:07:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 17:07:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 17:07:24,214 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 14 [2020-12-23 17:07:24,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:24,214 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 17:07:24,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:07:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 17:07:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 17:07:24,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:24,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:24,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 17:07:24,216 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:24,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1961777547, now seen corresponding path program 1 times [2020-12-23 17:07:24,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:24,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745727200] [2020-12-23 17:07:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:07:24,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745727200] [2020-12-23 17:07:24,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:24,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 17:07:24,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682780766] [2020-12-23 17:07:24,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:07:24,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:24,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:07:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:07:24,308 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 6 states. [2020-12-23 17:07:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:24,371 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-12-23 17:07:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:07:24,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 17:07:24,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:24,373 INFO L225 Difference]: With dead ends: 59 [2020-12-23 17:07:24,373 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 17:07:24,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:07:24,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 17:07:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2020-12-23 17:07:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 17:07:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-12-23 17:07:24,381 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 14 [2020-12-23 17:07:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:24,382 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-12-23 17:07:24,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:07:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-12-23 17:07:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 17:07:24,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:24,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:24,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 17:07:24,383 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:24,384 INFO L82 PathProgramCache]: Analyzing trace with hash 87668155, now seen corresponding path program 1 times [2020-12-23 17:07:24,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:24,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990099758] [2020-12-23 17:07:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:24,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990099758] [2020-12-23 17:07:24,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241965449] [2020-12-23 17:07:24,489 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 17:07:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 17:07:24,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:24,587 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 17:07:24,587 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 17:07:24,589 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:24,597 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:24,602 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:24,603 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-23 17:07:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:24,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:24,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 17:07:24,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516752232] [2020-12-23 17:07:24,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 17:07:24,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:24,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 17:07:24,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:07:24,750 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 12 states. [2020-12-23 17:07:25,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:25,036 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-12-23 17:07:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:07:25,037 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-23 17:07:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:25,038 INFO L225 Difference]: With dead ends: 85 [2020-12-23 17:07:25,039 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 17:07:25,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:07:25,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 17:07:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 49. [2020-12-23 17:07:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 17:07:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-23 17:07:25,042 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 14 [2020-12-23 17:07:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:25,042 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-23 17:07:25,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 17:07:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-23 17:07:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:07:25,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:25,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:25,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:25,258 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:25,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1694918977, now seen corresponding path program 1 times [2020-12-23 17:07:25,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:25,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551340702] [2020-12-23 17:07:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:07:25,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551340702] [2020-12-23 17:07:25,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:25,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:07:25,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629163160] [2020-12-23 17:07:25,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:07:25,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:25,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:07:25,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:07:25,305 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 3 states. [2020-12-23 17:07:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:25,322 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-23 17:07:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:07:25,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 17:07:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:25,323 INFO L225 Difference]: With dead ends: 47 [2020-12-23 17:07:25,323 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 17:07:25,324 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 17:07:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 17:07:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 17:07:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 17:07:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-12-23 17:07:25,330 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 17 [2020-12-23 17:07:25,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:25,330 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-12-23 17:07:25,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:07:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-12-23 17:07:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:07:25,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:25,337 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:25,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 17:07:25,338 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash 381862667, now seen corresponding path program 2 times [2020-12-23 17:07:25,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:25,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337647123] [2020-12-23 17:07:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:25,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337647123] [2020-12-23 17:07:25,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073405169] [2020-12-23 17:07:25,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:07:25,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:07:25,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:07:25,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:07:25,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:25,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:25,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-23 17:07:25,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809060311] [2020-12-23 17:07:25,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:07:25,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:25,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:07:25,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:07:25,607 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 11 states. [2020-12-23 17:07:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:25,728 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-12-23 17:07:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 17:07:25,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-12-23 17:07:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:25,730 INFO L225 Difference]: With dead ends: 89 [2020-12-23 17:07:25,730 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 17:07:25,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:07:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 17:07:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2020-12-23 17:07:25,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 17:07:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-12-23 17:07:25,733 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 17 [2020-12-23 17:07:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:25,734 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-12-23 17:07:25,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:07:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-12-23 17:07:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 17:07:25,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:25,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:25,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 17:07:25,945 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:07:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1024535203, now seen corresponding path program 1 times [2020-12-23 17:07:25,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:25,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649889810] [2020-12-23 17:07:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:07:25,963 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:07:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:07:25,977 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:07:25,999 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 17:07:25,999 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 17:07:25,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 17:07:26,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:07:26 BoogieIcfgContainer [2020-12-23 17:07:26,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:07:26,040 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:07:26,040 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:07:26,041 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:07:26,041 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:07:20" (3/4) ... [2020-12-23 17:07:26,044 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 17:07:26,121 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-ext-properties/960521-1_1-3.i-witness.graphml [2020-12-23 17:07:26,122 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:07:26,123 INFO L168 Benchmark]: Toolchain (without parser) took 6416.22 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 124.2 MB in the beginning and 162.4 MB in the end (delta: -38.1 MB). Peak memory consumption was 96.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:07:26,126 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:07:26,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 528.16 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 102.7 MB in the end (delta: 21.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:07:26,130 INFO L168 Benchmark]: Boogie Procedure Inliner took 78.15 ms. Allocated memory is still 151.0 MB. Free memory was 102.7 MB in the beginning and 100.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:07:26,134 INFO L168 Benchmark]: Boogie Preprocessor took 60.40 ms. Allocated memory is still 151.0 MB. Free memory was 100.7 MB in the beginning and 99.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:07:26,135 INFO L168 Benchmark]: RCFGBuilder took 496.11 ms. Allocated memory is still 151.0 MB. Free memory was 99.3 MB in the beginning and 78.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:07:26,136 INFO L168 Benchmark]: TraceAbstraction took 5155.89 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 78.3 MB in the beginning and 62.7 MB in the end (delta: 15.6 MB). Peak memory consumption was 46.6 MB. Max. memory is 8.0 GB. [2020-12-23 17:07:26,136 INFO L168 Benchmark]: Witness Printer took 81.35 ms. Allocated memory is still 181.4 MB. Free memory was 62.7 MB in the beginning and 162.4 MB in the end (delta: -99.6 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2020-12-23 17:07:26,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 528.16 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 102.7 MB in the end (delta: 21.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 78.15 ms. Allocated memory is still 151.0 MB. Free memory was 102.7 MB in the beginning and 100.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.40 ms. Allocated memory is still 151.0 MB. Free memory was 100.7 MB in the beginning and 99.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 496.11 ms. Allocated memory is still 151.0 MB. Free memory was 99.3 MB in the beginning and 78.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5155.89 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 78.3 MB in the beginning and 62.7 MB in the end (delta: 15.6 MB). Peak memory consumption was 46.6 MB. Max. memory is 8.0 GB. * Witness Printer took 81.35 ms. Allocated memory is still 181.4 MB. Free memory was 62.7 MB in the beginning and 162.4 MB in the end (delta: -99.6 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 547]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [a={0:0}, b={0:0}, n=0] [L536] n = 1 VAL [a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [a={1:0}, b={-2:4}, n=1] [L542] *b++ = 0 VAL [a={1:0}, b={-2:4}, n=1] [L528] int i; [L529] i = 0 VAL [a={1:0}, b={-2:4}, n=1] [L529] COND TRUE i < n VAL [a={1:0}, b={-2:4}, n=1] [L530] a[i] = -1 VAL [a={1:0}, b={-2:4}, n=1] [L529] i++ VAL [a={1:0}, b={-2:4}, n=1] [L529] COND FALSE !(i < n) VAL [a={1:0}, b={-2:4}, n=1] [L531] i = 0 VAL [a={1:0}, b={-2:4}, n=1] [L531] COND FALSE !(i < n - 1) VAL [a={1:0}, b={-2:4}, n=1] [L544] b[-1] VAL [a={1:0}, b={-2:4}, n=1] [L544] COND FALSE !(b[-1]) [L547] free(a) VAL [a={1:0}, b={-2:4}, n=1] [L547] free(a) VAL [a={1:0}, b={-2:4}, n=1] [L547] free(a) [L547] free(b) VAL [a={1:0}, b={-2:4}, n=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 21 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 573 SDtfs, 887 SDslu, 697 SDs, 0 SdLazy, 759 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=13, 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, 13 MinimizatonAttempts, 248 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 223 NumberOfCodeBlocks, 223 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 186 ConstructedInterpolants, 0 QuantifiedInterpolants, 14209 SizeOfPredicates, 18 NumberOfNonLiveVariables, 428 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 18 InterpolantComputations, 11 PerfectInterpolantSequences, 22/41 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...