/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/memsafety/test-0220.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:01:02,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:01:02,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:01:02,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:01:02,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:01:02,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:01:02,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:01:02,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:01:02,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:01:02,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:01:02,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:01:02,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:01:02,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:01:02,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:01:02,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:01:02,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:01:02,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:01:02,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:01:02,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:01:02,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:01:02,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:01:02,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:01:02,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:01:02,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:01:02,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 17:01:02,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 17:01:02,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 17:01:02,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 17:01:02,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 17:01:02,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 17:01:02,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 17:01:02,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 17:01:02,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 17:01:02,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 17:01:02,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 17:01:02,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 17:01:02,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 17:01:02,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 17:01:02,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:01:02,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:01:02,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:01:02,231 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 17:01:02,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:01:02,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:01:02,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:01:02,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:01:02,305 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:01:02,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:01:02,306 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:01:02,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:01:02,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:01:02,307 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:01:02,308 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:01:02,308 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:01:02,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:01:02,309 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:01:02,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:01:02,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:01:02,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:01:02,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:01:02,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:01:02,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:01:02,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:01:02,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:01:02,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:01:02,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:01:02,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:01:02,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:01:02,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:01:02,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:01:02,849 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:01:02,850 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:01:02,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0220.i [2020-12-23 17:01:02,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/be94cdf1c/323293f8ea9a400798eb5e6469719d71/FLAG62770493d [2020-12-23 17:01:03,756 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:01:03,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety/test-0220.i [2020-12-23 17:01:03,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/be94cdf1c/323293f8ea9a400798eb5e6469719d71/FLAG62770493d [2020-12-23 17:01:04,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/be94cdf1c/323293f8ea9a400798eb5e6469719d71 [2020-12-23 17:01:04,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:01:04,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:01:04,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:01:04,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:01:04,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:01:04,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ff3143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04, skipping insertion in model container [2020-12-23 17:01:04,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:01:04,102 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~item~0,],base],StructAccessExpression[IdentifierExpression[~item~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~item~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~item~0,],offset]]]] left hand side expression in assignment: address: IdentifierExpression[~list,] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~item~1,],base],StructAccessExpression[IdentifierExpression[~item~1,],offset]]] left hand side expression in assignment: address: IdentifierExpression[~list,] left hand side expression in assignment: lhs: VariableLHS[~list~0,GLOBAL] [2020-12-23 17:01:04,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:01:04,578 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~item~0,],base],StructAccessExpression[IdentifierExpression[~item~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~item~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~item~0,],offset]]]] left hand side expression in assignment: address: IdentifierExpression[~list,] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~item~1,],base],StructAccessExpression[IdentifierExpression[~item~1,],offset]]] left hand side expression in assignment: address: IdentifierExpression[~list,] left hand side expression in assignment: address: IdentifierExpression[~#list~0,GLOBAL] [2020-12-23 17:01:04,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:01:04,821 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:01:04,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04 WrapperNode [2020-12-23 17:01:04,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:01:04,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:01:04,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:01:04,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:01:04,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:01:04,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:01:04,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:01:04,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:01:04,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (1/1) ... [2020-12-23 17:01:04,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:01:04,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:01:04,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:01:04,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:01:04,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (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 17:01:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 17:01:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 17:01:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:01:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 17:01:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:01:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-23 17:01:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 17:01:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:01:05,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:01:05,863 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:01:05,864 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-23 17:01:05,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:01:05 BoogieIcfgContainer [2020-12-23 17:01:05,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:01:05,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:01:05,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:01:05,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:01:05,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:01:04" (1/3) ... [2020-12-23 17:01:05,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61085d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:01:05, skipping insertion in model container [2020-12-23 17:01:05,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:01:04" (2/3) ... [2020-12-23 17:01:05,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61085d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:01:05, skipping insertion in model container [2020-12-23 17:01:05,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:01:05" (3/3) ... [2020-12-23 17:01:05,883 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0220.i [2020-12-23 17:01:05,896 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:01:05,902 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 48 error locations. [2020-12-23 17:01:05,927 INFO L253 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2020-12-23 17:01:05,968 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:01:05,969 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:01:05,969 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:01:05,969 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:01:05,969 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:01:05,970 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:01:05,970 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:01:05,970 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:01:06,002 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-12-23 17:01:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:01:06,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:01:06,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:01:06,017 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION]=== [2020-12-23 17:01:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:01:06,024 INFO L82 PathProgramCache]: Analyzing trace with hash 925636, now seen corresponding path program 1 times [2020-12-23 17:01:06,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:01:06,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463430598] [2020-12-23 17:01:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:01:06,162 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 17:01:06,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812765632] [2020-12-23 17:01:06,163 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 17:01:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:01:06,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:01:06,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:01:06,384 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:01:06,386 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:06,394 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:01:06,394 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:01:06,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-23 17:01:06,402 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 17:01:06,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463430598] [2020-12-23 17:01:06,403 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 17:01:06,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812765632] [2020-12-23 17:01:06,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:01:06,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:01:06,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779898527] [2020-12-23 17:01:06,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:01:06,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:01:06,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:01:06,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:01:06,431 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 3 states. [2020-12-23 17:01:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:01:06,646 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-12-23 17:01:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:01:06,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 17:01:06,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:01:06,665 INFO L225 Difference]: With dead ends: 129 [2020-12-23 17:01:06,665 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 17:01:06,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:01:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 17:01:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 103. [2020-12-23 17:01:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 17:01:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-12-23 17:01:06,734 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 4 [2020-12-23 17:01:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:01:06,735 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-12-23 17:01:06,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:01:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-12-23 17:01:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 17:01:06,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:01:06,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 17:01:06,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 17:01:06,950 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION]=== [2020-12-23 17:01:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:01:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash 28694756, now seen corresponding path program 1 times [2020-12-23 17:01:06,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:01:06,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081158583] [2020-12-23 17:01:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:01:06,980 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 17:01:06,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322120440] [2020-12-23 17:01:06,985 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 17:01:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:01:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 17:01:07,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:01:07,197 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 17:01:07,299 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-23 17:01:07,505 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2020-12-23 17:01:07,506 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:22,109 WARN L197 SmtUtils]: Spent 14.60 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-23 17:01:22,111 INFO L625 ElimStorePlain]: treesize reduction 11, result has 91.7 percent of original size [2020-12-23 17:01:22,125 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2020-12-23 17:01:22,126 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:28,626 WARN L197 SmtUtils]: Spent 6.50 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 17:01:28,627 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:01:28,707 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2020-12-23 17:01:28,708 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:134, output treesize:121 [2020-12-23 17:01:29,101 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 17:01:29,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081158583] [2020-12-23 17:01:29,102 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 17:01:29,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322120440] [2020-12-23 17:01:29,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:01:29,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:01:29,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129260129] [2020-12-23 17:01:29,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:01:29,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:01:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:01:29,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:01:29,108 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 3 states. [2020-12-23 17:01:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:01:31,385 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-12-23 17:01:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:01:31,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-23 17:01:31,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:01:31,388 INFO L225 Difference]: With dead ends: 103 [2020-12-23 17:01:31,389 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 17:01:31,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 17:01:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 17:01:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-23 17:01:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 17:01:31,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-12-23 17:01:31,402 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 5 [2020-12-23 17:01:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:01:31,402 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-12-23 17:01:31,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:01:31,403 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-12-23 17:01:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 17:01:31,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:01:31,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:01:31,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:01:31,621 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION]=== [2020-12-23 17:01:31,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:01:31,623 INFO L82 PathProgramCache]: Analyzing trace with hash -248193326, now seen corresponding path program 1 times [2020-12-23 17:01:31,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:01:31,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068860727] [2020-12-23 17:01:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:01:31,639 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 17:01:31,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505939660] [2020-12-23 17:01:31,640 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 17:01:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:01:31,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 17:01:31,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:01:31,767 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 17:01:31,801 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-23 17:01:33,958 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2020-12-23 17:01:33,959 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:52,891 WARN L197 SmtUtils]: Spent 18.93 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-23 17:01:52,893 INFO L625 ElimStorePlain]: treesize reduction 11, result has 91.7 percent of original size [2020-12-23 17:01:52,907 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2020-12-23 17:01:52,908 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:56,134 WARN L197 SmtUtils]: Spent 3.23 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 17:01:56,135 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:01:56,166 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2020-12-23 17:01:56,166 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:134, output treesize:121 [2020-12-23 17:01:56,373 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 17:01:56,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068860727] [2020-12-23 17:01:56,374 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 17:01:56,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505939660] [2020-12-23 17:01:56,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:01:56,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:01:56,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140960724] [2020-12-23 17:01:56,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:01:56,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:01:56,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:01:56,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:01:56,376 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 3 states. [2020-12-23 17:01:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:01:56,595 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-12-23 17:01:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:01:56,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 17:01:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:01:56,597 INFO L225 Difference]: With dead ends: 102 [2020-12-23 17:01:56,597 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 17:01:56,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 17:01:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 17:01:56,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-23 17:01:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 17:01:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2020-12-23 17:01:56,606 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 12 [2020-12-23 17:01:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:01:56,606 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2020-12-23 17:01:56,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:01:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2020-12-23 17:01:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 17:01:56,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:01:56,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:01:56,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:01:56,823 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION]=== [2020-12-23 17:01:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:01:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1069793572, now seen corresponding path program 1 times [2020-12-23 17:01:56,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:01:56,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486165987] [2020-12-23 17:01:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:01:56,843 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 17:01:56,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460631790] [2020-12-23 17:01:56,845 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 17:01:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:01:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 17:01:56,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:01:56,949 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:01:56,950 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:56,953 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:01:56,953 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:01:56,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-23 17:01:57,003 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:01:57,004 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2020-12-23 17:01:57,007 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:57,025 INFO L625 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2020-12-23 17:01:57,026 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:01:57,027 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:11 [2020-12-23 17:01:57,035 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 17:01:57,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486165987] [2020-12-23 17:01:57,036 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 17:01:57,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460631790] [2020-12-23 17:01:57,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:01:57,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 17:01:57,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124597405] [2020-12-23 17:01:57,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:01:57,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:01:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:01:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:01:57,039 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 5 states. [2020-12-23 17:01:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:01:57,284 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2020-12-23 17:01:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:01:57,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 17:01:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:01:57,286 INFO L225 Difference]: With dead ends: 129 [2020-12-23 17:01:57,286 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 17:01:57,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:01:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 17:01:57,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-12-23 17:01:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 17:01:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2020-12-23 17:01:57,296 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 18 [2020-12-23 17:01:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:01:57,297 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2020-12-23 17:01:57,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:01:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2020-12-23 17:01:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 17:01:57,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:01:57,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:01:57,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:01:57,509 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION]=== [2020-12-23 17:01:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:01:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1069793571, now seen corresponding path program 1 times [2020-12-23 17:01:57,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:01:57,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390948400] [2020-12-23 17:01:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:01:57,525 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 17:01:57,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034022006] [2020-12-23 17:01:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:01:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:01:57,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 17:01:57,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:01:57,666 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:01:57,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:57,693 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:01:57,700 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-12-23 17:01:57,701 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:57,717 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:01:57,723 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:01:57,723 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:40 [2020-12-23 17:01:58,040 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:01:58,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:01:58,052 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 17:01:58,080 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:01:58,081 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-12-23 17:01:58,083 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:01:58,085 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:58,103 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:01:58,105 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-12-23 17:01:58,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:01:58,110 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:58,161 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:01:58,172 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2020-12-23 17:01:58,181 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:58,193 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2020-12-23 17:01:58,195 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-23 17:01:58,284 INFO L625 ElimStorePlain]: treesize reduction 4, result has 92.7 percent of original size [2020-12-23 17:01:58,287 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2020-12-23 17:01:58,288 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:51 [2020-12-23 17:01:58,378 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 17:01:58,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390948400] [2020-12-23 17:01:58,379 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 17:01:58,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034022006] [2020-12-23 17:01:58,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:01:58,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 17:01:58,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775558250] [2020-12-23 17:01:58,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 17:01:58,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:01:58,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 17:01:58,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:01:58,381 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand 7 states. [2020-12-23 17:01:58,548 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-23 17:01:58,870 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-23 17:01:59,443 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-23 17:02:00,249 WARN L197 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-12-23 17:02:00,741 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-23 17:02:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:02:01,279 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2020-12-23 17:02:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 17:02:01,280 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 17:02:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:02:01,281 INFO L225 Difference]: With dead ends: 129 [2020-12-23 17:02:01,281 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 17:02:01,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:02:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 17:02:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 97. [2020-12-23 17:02:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 17:02:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2020-12-23 17:02:01,289 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 18 [2020-12-23 17:02:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:02:01,290 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2020-12-23 17:02:01,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 17:02:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2020-12-23 17:02:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 17:02:01,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:02:01,291 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 17:02:01,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:02:01,505 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION]=== [2020-12-23 17:02:01,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:02:01,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1196137661, now seen corresponding path program 1 times [2020-12-23 17:02:01,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:02:01,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816175127] [2020-12-23 17:02:01,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:02:01,520 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 17:02:01,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151527429] [2020-12-23 17:02:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:02:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:02:01,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 17:02:01,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:02:01,641 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 17:02:01,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816175127] [2020-12-23 17:02:01,642 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 17:02:01,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151527429] [2020-12-23 17:02:01,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:02:01,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:02:01,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304542889] [2020-12-23 17:02:01,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:02:01,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:02:01,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:02:01,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:02:01,644 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 3 states. [2020-12-23 17:02:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:02:01,756 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-12-23 17:02:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:02:01,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 17:02:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:02:01,759 INFO L225 Difference]: With dead ends: 98 [2020-12-23 17:02:01,759 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 17:02:01,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 17:02:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 17:02:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-12-23 17:02:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 17:02:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-12-23 17:02:01,766 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 19 [2020-12-23 17:02:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:02:01,766 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-12-23 17:02:01,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:02:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-12-23 17:02:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 17:02:01,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:02:01,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:02:01,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:02:01,981 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION]=== [2020-12-23 17:02:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:02:01,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1562943074, now seen corresponding path program 1 times [2020-12-23 17:02:01,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:02:01,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959880931] [2020-12-23 17:02:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:02:02,009 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 17:02:02,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84095562] [2020-12-23 17:02:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:02:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:02:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 17:02:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:02:02,104 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:02:02,105 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:02,108 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:02,108 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:02:02,109 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-23 17:02:02,159 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:02,160 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2020-12-23 17:02:02,164 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:02,180 INFO L625 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2020-12-23 17:02:02,181 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:02:02,182 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:11 [2020-12-23 17:02:02,218 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:02,218 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2020-12-23 17:02:02,223 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:02,240 INFO L625 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2020-12-23 17:02:02,243 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:02:02,243 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:11 [2020-12-23 17:02:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:02:02,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959880931] [2020-12-23 17:02:02,259 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 17:02:02,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84095562] [2020-12-23 17:02:02,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:02:02,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 17:02:02,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806421106] [2020-12-23 17:02:02,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:02:02,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:02:02,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:02:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:02:02,261 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 6 states. [2020-12-23 17:02:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:02:02,554 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-12-23 17:02:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 17:02:02,555 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 17:02:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:02:02,556 INFO L225 Difference]: With dead ends: 124 [2020-12-23 17:02:02,556 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 17:02:02,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:02:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 17:02:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-12-23 17:02:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 17:02:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-12-23 17:02:02,579 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 21 [2020-12-23 17:02:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:02:02,580 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-12-23 17:02:02,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:02:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-12-23 17:02:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 17:02:02,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:02:02,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:02:02,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:02:02,784 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION]=== [2020-12-23 17:02:02,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:02:02,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1562943073, now seen corresponding path program 1 times [2020-12-23 17:02:02,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:02:02,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347560423] [2020-12-23 17:02:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:02:02,807 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 17:02:02,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579540211] [2020-12-23 17:02:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:02:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:02:02,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 17:02:02,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:02:02,971 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 17:02:02,999 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-23 17:02:03,086 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2020-12-23 17:02:03,087 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:05,539 WARN L197 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-23 17:02:05,541 INFO L625 ElimStorePlain]: treesize reduction 11, result has 92.4 percent of original size [2020-12-23 17:02:05,553 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:02:05,554 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:05,566 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:02:05,575 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:07,769 WARN L197 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 17:02:07,770 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:07,783 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2020-12-23 17:02:07,784 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:07,906 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-23 17:02:07,907 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:07,938 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2020-12-23 17:02:07,939 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:145, output treesize:130 [2020-12-23 17:02:08,084 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-23 17:02:10,816 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-23 17:02:10,852 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:02:15,357 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 53 [2020-12-23 17:02:15,615 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-23 17:02:15,702 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:02:15,764 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 17:02:15,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 17:02:15,869 INFO L443 ElimStorePlain]: Different costs {1=[|v_#length_54|], 3=[|v_#valid_73|]} [2020-12-23 17:02:15,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:02:15,896 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2020-12-23 17:02:15,899 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:15,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:02:15,925 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2020-12-23 17:02:15,927 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:16,060 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 17:02:16,060 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:16,106 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:16,107 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-12-23 17:02:16,109 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:02:16,111 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:16,154 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:16,155 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-12-23 17:02:16,157 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:02:16,160 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:16,288 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-23 17:02:16,289 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:16,323 INFO L547 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2020-12-23 17:02:16,324 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:163, output treesize:179 [2020-12-23 17:02:18,937 WARN L197 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-12-23 17:02:19,582 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-23 17:02:20,399 WARN L197 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-23 17:02:20,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:02:20,525 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:02:20,562 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 17:02:20,610 INFO L443 ElimStorePlain]: Different costs {1=[|v_#length_55|], 6=[|v_#valid_74|]} [2020-12-23 17:02:20,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:02:20,638 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2020-12-23 17:02:20,640 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:02:20,667 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2020-12-23 17:02:20,669 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:20,839 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-23 17:02:20,840 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:20,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:02:20,873 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:20,874 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2020-12-23 17:02:20,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:02:20,878 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:20,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:02:20,905 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:20,906 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2020-12-23 17:02:20,907 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:02:20,910 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-23 17:02:21,042 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 17:02:21,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:02:21,065 INFO L547 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2020-12-23 17:02:21,065 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 11 variables, input treesize:165, output treesize:125 [2020-12-23 17:02:25,332 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 59 [2020-12-23 17:02:25,512 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 17:02:25,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347560423] [2020-12-23 17:02:25,512 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 17:02:25,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579540211] [2020-12-23 17:02:25,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:02:25,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 17:02:25,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864155638] [2020-12-23 17:02:25,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:02:25,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:02:25,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:02:25,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=86, Unknown=2, NotChecked=0, Total=110 [2020-12-23 17:02:25,515 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 11 states. [2020-12-23 17:02:48,828 WARN L197 SmtUtils]: Spent 22.84 s on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-12-23 17:04:01,800 WARN L197 SmtUtils]: Spent 1.21 m on a formula simplification. DAG size of input: 82 DAG size of output: 82