/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/960521-1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:57:44,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:57:44,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:57:44,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:57:44,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:57:44,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:57:44,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:57:44,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:57:44,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:57:44,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:57:44,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:57:44,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:57:44,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:57:44,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:57:44,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:57:44,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:57:44,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:57:44,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:57:44,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:57:44,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:57:44,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:57:44,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:57:44,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:57:44,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:57:44,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:57:44,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:57:44,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:57:44,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:57:44,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:57:44,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:57:44,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:57:44,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:57:44,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:57:44,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:57:44,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:57:44,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:57:44,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:57:44,209 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:57:44,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:57:44,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:57:44,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:57:44,212 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:57:44,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:57:44,225 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:57:44,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:57:44,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:57:44,226 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:57:44,226 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:57:44,227 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:57:44,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:57:44,227 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:57:44,227 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:57:44,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:57:44,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:57:44,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:57:44,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:44,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:57:44,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:57:44,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:57:44,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:57:44,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:57:44,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:57:44,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:57:44,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:57:44,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:57:44,625 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:57:44,625 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:57:44,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-1.i [2020-12-23 16:57:44,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8d5bc8269/de3d883310ca414594ccec0253ab7ed7/FLAG1563a2b79 [2020-12-23 16:57:45,325 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:57:45,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-1.i [2020-12-23 16:57:45,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8d5bc8269/de3d883310ca414594ccec0253ab7ed7/FLAG1563a2b79 [2020-12-23 16:57:45,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8d5bc8269/de3d883310ca414594ccec0253ab7ed7 [2020-12-23 16:57:45,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:57:45,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:57:45,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:45,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:57:45,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:57:45,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:45" (1/1) ... [2020-12-23 16:57:45,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4fddf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:45, skipping insertion in model container [2020-12-23 16:57:45,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:45" (1/1) ... [2020-12-23 16:57:45,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:57:45,702 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post9,] [2020-12-23 16:57:45,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:45,990 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post9,] [2020-12-23 16:57:46,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:46,110 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:57:46,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46 WrapperNode [2020-12-23 16:57:46,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:46,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:46,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:57:46,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:57:46,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (1/1) ... [2020-12-23 16:57:46,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (1/1) ... [2020-12-23 16:57:46,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:46,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:57:46,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:57:46,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:57:46,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (1/1) ... [2020-12-23 16:57:46,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (1/1) ... [2020-12-23 16:57:46,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (1/1) ... [2020-12-23 16:57:46,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (1/1) ... [2020-12-23 16:57:46,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (1/1) ... [2020-12-23 16:57:46,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (1/1) ... [2020-12-23 16:57:46,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (1/1) ... [2020-12-23 16:57:46,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:57:46,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:57:46,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:57:46,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:57:46,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:57:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:57:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 16:57:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:57:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:57:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 16:57:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:57:46,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:57:46,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:57:46,747 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 16:57:46,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:46 BoogieIcfgContainer [2020-12-23 16:57:46,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:57:46,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:57:46,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:57:46,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:57:46,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:57:45" (1/3) ... [2020-12-23 16:57:46,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267dda7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:57:46, skipping insertion in model container [2020-12-23 16:57:46,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:46" (2/3) ... [2020-12-23 16:57:46,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267dda7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:57:46, skipping insertion in model container [2020-12-23 16:57:46,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:46" (3/3) ... [2020-12-23 16:57:46,776 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-1.i [2020-12-23 16:57:46,788 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:57:46,802 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2020-12-23 16:57:46,840 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2020-12-23 16:57:46,881 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:57:46,882 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:57:46,882 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:57:46,883 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:57:46,885 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:57:46,886 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:57:46,886 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:57:46,887 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:57:46,912 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-23 16:57:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-23 16:57:46,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:46,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-23 16:57:46,923 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:46,932 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2020-12-23 16:57:46,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:46,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640166084] [2020-12-23 16:57:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:47,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640166084] [2020-12-23 16:57:47,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:47,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:57:47,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401758468] [2020-12-23 16:57:47,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:47,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:47,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:47,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:47,158 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-12-23 16:57:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:47,219 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-23 16:57:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:47,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-23 16:57:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:47,231 INFO L225 Difference]: With dead ends: 49 [2020-12-23 16:57:47,232 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 16:57:47,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 16:57:47,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 16:57:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:57:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-23 16:57:47,280 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2020-12-23 16:57:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:47,280 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-23 16:57:47,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-23 16:57:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-23 16:57:47,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:47,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-23 16:57:47,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:57:47,282 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2020-12-23 16:57:47,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:47,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483412470] [2020-12-23 16:57:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:47,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483412470] [2020-12-23 16:57:47,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:47,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:57:47,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822696761] [2020-12-23 16:57:47,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:47,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:47,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:47,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:47,376 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 3 states. [2020-12-23 16:57:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:47,421 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-23 16:57:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:47,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-23 16:57:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:47,422 INFO L225 Difference]: With dead ends: 46 [2020-12-23 16:57:47,423 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 16:57:47,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 16:57:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 16:57:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:57:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-23 16:57:47,437 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 3 [2020-12-23 16:57:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:47,438 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-23 16:57:47,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-23 16:57:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:57:47,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:47,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:57:47,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:57:47,441 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2020-12-23 16:57:47,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:47,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886570994] [2020-12-23 16:57:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:47,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886570994] [2020-12-23 16:57:47,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:47,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:57:47,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830503460] [2020-12-23 16:57:47,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:47,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:47,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:47,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:47,516 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2020-12-23 16:57:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:47,559 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-23 16:57:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:47,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:57:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:47,562 INFO L225 Difference]: With dead ends: 43 [2020-12-23 16:57:47,562 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 16:57:47,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:47,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 16:57:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 16:57:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 16:57:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-12-23 16:57:47,575 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 6 [2020-12-23 16:57:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:47,576 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-12-23 16:57:47,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-12-23 16:57:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:57:47,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:47,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:57:47,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:57:47,580 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2020-12-23 16:57:47,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:47,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994271381] [2020-12-23 16:57:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:47,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994271381] [2020-12-23 16:57:47,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:47,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:57:47,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424987905] [2020-12-23 16:57:47,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:57:47,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:47,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:57:47,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:47,713 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 5 states. [2020-12-23 16:57:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:47,848 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-23 16:57:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:57:47,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-23 16:57:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:47,852 INFO L225 Difference]: With dead ends: 49 [2020-12-23 16:57:47,852 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 16:57:47,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 16:57:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-12-23 16:57:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 16:57:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-23 16:57:47,859 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2020-12-23 16:57:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:47,859 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-23 16:57:47,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:57:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-23 16:57:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:57:47,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:47,860 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:47,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:57:47,861 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:47,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2020-12-23 16:57:47,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:47,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62152686] [2020-12-23 16:57:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:47,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62152686] [2020-12-23 16:57:47,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444437410] [2020-12-23 16:57:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:48,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 16:57:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:48,134 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 16:57:48,135 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 16:57:48,137 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:48,146 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:48,158 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:57:48,159 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-23 16:57:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:48,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:48,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-12-23 16:57:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293408161] [2020-12-23 16:57:48,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:57:48,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:48,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:57:48,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:57:48,256 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 9 states. [2020-12-23 16:57:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:48,444 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-23 16:57:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:57:48,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 16:57:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:48,446 INFO L225 Difference]: With dead ends: 57 [2020-12-23 16:57:48,446 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 16:57:48,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:57:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 16:57:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-12-23 16:57:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 16:57:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-23 16:57:48,452 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 9 [2020-12-23 16:57:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:48,453 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-23 16:57:48,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:57:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-23 16:57:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 16:57:48,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:48,454 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 16:57:48,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:48,668 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1472839145, now seen corresponding path program 2 times [2020-12-23 16:57:48,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:48,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905696975] [2020-12-23 16:57:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:48,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905696975] [2020-12-23 16:57:48,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887930876] [2020-12-23 16:57:48,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:57:48,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:57:48,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:48,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 16:57:48,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:48,947 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 16:57:48,948 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 16:57:48,950 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:48,957 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:48,961 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 16:57:48,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-12-23 16:57:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:49,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:49,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 16:57:49,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138984303] [2020-12-23 16:57:49,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 16:57:49,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:49,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 16:57:49,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:57:49,104 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2020-12-23 16:57:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:49,401 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2020-12-23 16:57:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:57:49,409 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-12-23 16:57:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:49,411 INFO L225 Difference]: With dead ends: 120 [2020-12-23 16:57:49,411 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 16:57:49,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:57:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 16:57:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 54. [2020-12-23 16:57:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 16:57:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-12-23 16:57:49,425 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 12 [2020-12-23 16:57:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:49,426 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-12-23 16:57:49,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 16:57:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-12-23 16:57:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:57:49,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:49,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:49,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:49,642 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502829, now seen corresponding path program 1 times [2020-12-23 16:57:49,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:49,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242154742] [2020-12-23 16:57:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:57:49,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242154742] [2020-12-23 16:57:49,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:49,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:57:49,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856569332] [2020-12-23 16:57:49,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:49,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:49,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:49,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:49,713 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2020-12-23 16:57:49,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:49,764 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-23 16:57:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:57:49,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-23 16:57:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:49,765 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:57:49,765 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 16:57:49,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:49,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 16:57:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 16:57:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:57:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-23 16:57:49,770 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 20 [2020-12-23 16:57:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:49,771 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-23 16:57:49,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-23 16:57:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:57:49,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:49,772 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:49,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:57:49,772 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 1 times [2020-12-23 16:57:49,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:49,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420922333] [2020-12-23 16:57:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:49,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420922333] [2020-12-23 16:57:49,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343294014] [2020-12-23 16:57:49,840 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 16:57:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 16:57:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:50,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:50,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-23 16:57:50,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332234026] [2020-12-23 16:57:50,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:57:50,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:50,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:57:50,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:57:50,004 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 13 states. [2020-12-23 16:57:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:50,095 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-12-23 16:57:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:57:50,095 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-12-23 16:57:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:50,096 INFO L225 Difference]: With dead ends: 73 [2020-12-23 16:57:50,096 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 16:57:50,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:57:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 16:57:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-12-23 16:57:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:57:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-12-23 16:57:50,102 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 20 [2020-12-23 16:57:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:50,102 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-12-23 16:57:50,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:57:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-12-23 16:57:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 16:57:50,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:50,103 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:50,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:50,318 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:50,319 INFO L82 PathProgramCache]: Analyzing trace with hash 116531578, now seen corresponding path program 2 times [2020-12-23 16:57:50,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:50,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588254737] [2020-12-23 16:57:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:50,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588254737] [2020-12-23 16:57:50,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521510297] [2020-12-23 16:57:50,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:57:50,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:57:50,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:50,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 16:57:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:50,500 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 16:57:50,500 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 16:57:50,502 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:50,511 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:50,516 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:57:50,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-23 16:57:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:57:50,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:50,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2020-12-23 16:57:50,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648055791] [2020-12-23 16:57:50,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:57:50,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:50,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:57:50,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:57:50,617 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 5 states. [2020-12-23 16:57:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:50,699 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-12-23 16:57:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:57:50,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-23 16:57:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:50,701 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:57:50,701 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 16:57:50,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:57:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 16:57:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 16:57:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:57:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-12-23 16:57:50,708 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 23 [2020-12-23 16:57:50,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:50,709 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-12-23 16:57:50,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:57:50,709 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-12-23 16:57:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:57:50,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:50,710 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:50,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:50,913 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1258641039, now seen corresponding path program 1 times [2020-12-23 16:57:50,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:50,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661463609] [2020-12-23 16:57:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:57:50,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661463609] [2020-12-23 16:57:50,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155485592] [2020-12-23 16:57:50,988 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 16:57:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:51,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 16:57:51,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:57:51,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:51,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 16:57:51,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478554733] [2020-12-23 16:57:51,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:57:51,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:51,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:57:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:57:51,162 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 15 states. [2020-12-23 16:57:51,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:51,277 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-23 16:57:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:57:51,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-23 16:57:51,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:51,278 INFO L225 Difference]: With dead ends: 67 [2020-12-23 16:57:51,278 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 16:57:51,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:57:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 16:57:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2020-12-23 16:57:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 16:57:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-12-23 16:57:51,283 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 26 [2020-12-23 16:57:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:51,283 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-12-23 16:57:51,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:57:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-12-23 16:57:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 16:57:51,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:51,284 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:51,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 16:57:51,498 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 2 times [2020-12-23 16:57:51,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:51,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136250909] [2020-12-23 16:57:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:57:51,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136250909] [2020-12-23 16:57:51,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588168726] [2020-12-23 16:57:51,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:57:51,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:57:51,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:51,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 16:57:51,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:57:51,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:51,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-23 16:57:51,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630229101] [2020-12-23 16:57:51,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:57:51,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:51,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:57:51,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:57:51,770 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 17 states. [2020-12-23 16:57:51,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:51,883 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-12-23 16:57:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:57:51,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-12-23 16:57:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:51,885 INFO L225 Difference]: With dead ends: 74 [2020-12-23 16:57:51,885 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 16:57:51,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:57:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 16:57:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-12-23 16:57:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:57:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-12-23 16:57:51,889 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 29 [2020-12-23 16:57:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:51,890 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-12-23 16:57:51,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:57:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-12-23 16:57:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 16:57:51,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:51,891 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:52,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:52,104 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:52,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:52,105 INFO L82 PathProgramCache]: Analyzing trace with hash 611161295, now seen corresponding path program 3 times [2020-12-23 16:57:52,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:52,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989968453] [2020-12-23 16:57:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:57:52,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989968453] [2020-12-23 16:57:52,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890899319] [2020-12-23 16:57:52,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:57:52,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 16:57:52,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:52,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 16:57:52,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:52,346 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 16:57:52,346 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 16:57:52,348 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,357 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:52,366 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:57:52,366 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-23 16:57:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:57:52,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:52,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2020-12-23 16:57:52,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681167555] [2020-12-23 16:57:52,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:57:52,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:57:52,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:57:52,556 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 7 states. [2020-12-23 16:57:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:52,638 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-12-23 16:57:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:57:52,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-23 16:57:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:52,640 INFO L225 Difference]: With dead ends: 63 [2020-12-23 16:57:52,640 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 16:57:52,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:57:52,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 16:57:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 16:57:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 16:57:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-23 16:57:52,652 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 32 [2020-12-23 16:57:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:52,652 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-23 16:57:52,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:57:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-23 16:57:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 16:57:52,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:52,656 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:52,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:52,858 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:52,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1172416315, now seen corresponding path program 1 times [2020-12-23 16:57:52,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:52,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580409091] [2020-12-23 16:57:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:57:52,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580409091] [2020-12-23 16:57:52,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67363708] [2020-12-23 16:57:52,946 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 16:57:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:53,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 16:57:53,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:57:53,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:53,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-23 16:57:53,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97147302] [2020-12-23 16:57:53,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:57:53,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:53,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:57:53,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:57:53,232 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 19 states. [2020-12-23 16:57:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:53,357 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-23 16:57:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:57:53,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-12-23 16:57:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:53,359 INFO L225 Difference]: With dead ends: 73 [2020-12-23 16:57:53,359 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 16:57:53,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:57:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 16:57:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-12-23 16:57:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 16:57:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-23 16:57:53,363 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 53 [2020-12-23 16:57:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:53,363 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-23 16:57:53,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:57:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-23 16:57:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 16:57:53,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:53,365 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:53,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 16:57:53,579 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:53,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1736039872, now seen corresponding path program 2 times [2020-12-23 16:57:53,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:53,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101595663] [2020-12-23 16:57:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:57:53,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101595663] [2020-12-23 16:57:53,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674553332] [2020-12-23 16:57:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:53,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:57:53,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:53,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 16:57:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-23 16:57:53,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:53,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 13 [2020-12-23 16:57:53,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36781314] [2020-12-23 16:57:53,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:53,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:53,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:53,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:57:53,841 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 3 states. [2020-12-23 16:57:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:53,852 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-23 16:57:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:53,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-23 16:57:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:53,854 INFO L225 Difference]: With dead ends: 67 [2020-12-23 16:57:53,855 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 16:57:53,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:57:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 16:57:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-23 16:57:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 16:57:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-12-23 16:57:53,858 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 59 [2020-12-23 16:57:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:53,858 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-12-23 16:57:53,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-12-23 16:57:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 16:57:53,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:53,860 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:54,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:54,074 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:54,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1887003102, now seen corresponding path program 1 times [2020-12-23 16:57:54,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:54,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69109774] [2020-12-23 16:57:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:57:54,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69109774] [2020-12-23 16:57:54,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508597928] [2020-12-23 16:57:54,190 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:54,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:57:54,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:57:54,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:54,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-23 16:57:54,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213312639] [2020-12-23 16:57:54,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 16:57:54,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:54,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 16:57:54,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:57:54,445 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 21 states. [2020-12-23 16:57:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:54,593 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-12-23 16:57:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:57:54,594 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-12-23 16:57:54,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:54,594 INFO L225 Difference]: With dead ends: 77 [2020-12-23 16:57:54,594 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 16:57:54,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:57:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 16:57:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-12-23 16:57:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 16:57:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-12-23 16:57:54,598 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 61 [2020-12-23 16:57:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:54,598 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-12-23 16:57:54,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 16:57:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-12-23 16:57:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 16:57:54,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:54,600 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:54,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 16:57:54,813 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:54,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1202087175, now seen corresponding path program 2 times [2020-12-23 16:57:54,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:54,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139175303] [2020-12-23 16:57:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 16:57:54,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139175303] [2020-12-23 16:57:54,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497474210] [2020-12-23 16:57:54,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:55,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:57:55,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:55,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:57:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 16:57:55,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:55,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2020-12-23 16:57:55,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633721139] [2020-12-23 16:57:55,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:57:55,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:55,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:57:55,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:57:55,241 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2020-12-23 16:57:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:55,400 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-12-23 16:57:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:57:55,401 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-12-23 16:57:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:55,402 INFO L225 Difference]: With dead ends: 83 [2020-12-23 16:57:55,402 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 16:57:55,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:57:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 16:57:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-12-23 16:57:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 16:57:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-12-23 16:57:55,407 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 67 [2020-12-23 16:57:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:55,407 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-12-23 16:57:55,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:57:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-12-23 16:57:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 16:57:55,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:55,413 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:55,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 16:57:55,629 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash 835466114, now seen corresponding path program 3 times [2020-12-23 16:57:55,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:55,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774137116] [2020-12-23 16:57:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 16:57:55,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774137116] [2020-12-23 16:57:55,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767012388] [2020-12-23 16:57:55,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:56,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 16:57:56,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:56,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 16:57:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 16:57:56,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:56,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2020-12-23 16:57:56,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130276262] [2020-12-23 16:57:56,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:57:56,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:56,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:57:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:57:56,239 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 25 states. [2020-12-23 16:57:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:56,406 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-12-23 16:57:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:57:56,408 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-12-23 16:57:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:56,409 INFO L225 Difference]: With dead ends: 89 [2020-12-23 16:57:56,409 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 16:57:56,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=392, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:57:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 16:57:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-12-23 16:57:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 16:57:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-12-23 16:57:56,412 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 73 [2020-12-23 16:57:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:56,413 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-12-23 16:57:56,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:57:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-12-23 16:57:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 16:57:56,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:56,414 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:56,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:57:56,629 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:56,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1843123545, now seen corresponding path program 4 times [2020-12-23 16:57:56,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:56,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835213451] [2020-12-23 16:57:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 16:57:56,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835213451] [2020-12-23 16:57:56,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137724494] [2020-12-23 16:57:56,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:57,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:57:57,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 16:57:57,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 16:57:57,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:57,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2020-12-23 16:57:57,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004008939] [2020-12-23 16:57:57,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:57:57,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:57,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:57:57,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:57:57,480 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 27 states. [2020-12-23 16:57:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:57,669 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2020-12-23 16:57:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:57:57,670 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-12-23 16:57:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:57,670 INFO L225 Difference]: With dead ends: 95 [2020-12-23 16:57:57,670 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 16:57:57,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=299, Invalid=457, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:57:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 16:57:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2020-12-23 16:57:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 16:57:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-12-23 16:57:57,674 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 79 [2020-12-23 16:57:57,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:57,674 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-12-23 16:57:57,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:57:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-12-23 16:57:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 16:57:57,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:57,675 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:57,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:57:57,888 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:57:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1384358114, now seen corresponding path program 5 times [2020-12-23 16:57:57,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:57,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966532291] [2020-12-23 16:57:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:57:58,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966532291] [2020-12-23 16:57:58,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110042284] [2020-12-23 16:57:58,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:00,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 16:58:00,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:00,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 16:58:00,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:58:00,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:00,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 16:58:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164571487] [2020-12-23 16:58:00,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:58:00,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:58:00,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:58:00,880 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 16 states. [2020-12-23 16:58:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:01,017 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-12-23 16:58:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:58:01,017 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 85 [2020-12-23 16:58:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:01,018 INFO L225 Difference]: With dead ends: 102 [2020-12-23 16:58:01,018 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 16:58:01,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:58:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 16:58:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-12-23 16:58:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 16:58:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-12-23 16:58:01,021 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2020-12-23 16:58:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:01,021 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-12-23 16:58:01,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:58:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-12-23 16:58:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 16:58:01,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:01,023 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:01,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:01,238 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1888928097, now seen corresponding path program 6 times [2020-12-23 16:58:01,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:01,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596642100] [2020-12-23 16:58:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:58:01,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596642100] [2020-12-23 16:58:01,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86112882] [2020-12-23 16:58:01,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:02,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-23 16:58:02,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:02,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 16:58:02,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:58:03,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:03,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 16:58:03,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303487035] [2020-12-23 16:58:03,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:58:03,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:03,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:58:03,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:58:03,108 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 17 states. [2020-12-23 16:58:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:03,242 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2020-12-23 16:58:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:58:03,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2020-12-23 16:58:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:03,246 INFO L225 Difference]: With dead ends: 109 [2020-12-23 16:58:03,246 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 16:58:03,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:58:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 16:58:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2020-12-23 16:58:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 16:58:03,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-12-23 16:58:03,250 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 88 [2020-12-23 16:58:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:03,250 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-12-23 16:58:03,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:58:03,250 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-12-23 16:58:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 16:58:03,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:03,251 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:03,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:03,461 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:03,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:03,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1147755650, now seen corresponding path program 7 times [2020-12-23 16:58:03,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:03,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941306807] [2020-12-23 16:58:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:58:03,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941306807] [2020-12-23 16:58:03,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610372955] [2020-12-23 16:58:03,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:03,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 16:58:03,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 16:58:04,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:04,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-12-23 16:58:04,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31445107] [2020-12-23 16:58:04,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 16:58:04,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:04,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 16:58:04,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=559, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:58:04,023 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 31 states. [2020-12-23 16:58:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:04,263 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2020-12-23 16:58:04,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:58:04,263 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-12-23 16:58:04,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:04,264 INFO L225 Difference]: With dead ends: 113 [2020-12-23 16:58:04,264 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 16:58:04,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=440, Invalid=682, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:58:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 16:58:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2020-12-23 16:58:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 16:58:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-12-23 16:58:04,269 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 91 [2020-12-23 16:58:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:04,269 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-12-23 16:58:04,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 16:58:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-12-23 16:58:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 16:58:04,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:04,271 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:04,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:04,487 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash -80761369, now seen corresponding path program 8 times [2020-12-23 16:58:04,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:04,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713056379] [2020-12-23 16:58:04,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 16:58:04,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713056379] [2020-12-23 16:58:04,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461988425] [2020-12-23 16:58:04,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:04,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:58:04,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:04,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 16:58:04,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 16:58:05,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:05,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2020-12-23 16:58:05,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080353316] [2020-12-23 16:58:05,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 16:58:05,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:05,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 16:58:05,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=732, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:58:05,176 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 35 states. [2020-12-23 16:58:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:05,410 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2020-12-23 16:58:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 16:58:05,411 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-12-23 16:58:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:05,412 INFO L225 Difference]: With dead ends: 119 [2020-12-23 16:58:05,413 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 16:58:05,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=493, Invalid=767, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:58:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 16:58:05,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2020-12-23 16:58:05,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 16:58:05,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-12-23 16:58:05,418 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 103 [2020-12-23 16:58:05,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:05,418 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-12-23 16:58:05,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 16:58:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-12-23 16:58:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-23 16:58:05,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:05,420 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:05,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 16:58:05,635 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:05,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:05,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1635779490, now seen corresponding path program 9 times [2020-12-23 16:58:05,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:05,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466857943] [2020-12-23 16:58:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 16:58:05,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466857943] [2020-12-23 16:58:05,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205456045] [2020-12-23 16:58:05,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:08,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-23 16:58:09,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 16:58:09,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 16:58:09,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:09,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2020-12-23 16:58:09,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239983034] [2020-12-23 16:58:09,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 16:58:09,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:09,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 16:58:09,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:58:09,382 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 37 states. [2020-12-23 16:58:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:09,637 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2020-12-23 16:58:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 16:58:09,637 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-12-23 16:58:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:09,639 INFO L225 Difference]: With dead ends: 125 [2020-12-23 16:58:09,639 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 16:58:09,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=549, Invalid=857, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:58:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 16:58:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2020-12-23 16:58:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 16:58:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-12-23 16:58:09,644 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 109 [2020-12-23 16:58:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:09,644 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-12-23 16:58:09,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 16:58:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-12-23 16:58:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 16:58:09,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:09,645 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:09,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 16:58:09,859 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:09,860 INFO L82 PathProgramCache]: Analyzing trace with hash 736193415, now seen corresponding path program 10 times [2020-12-23 16:58:09,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:09,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708081794] [2020-12-23 16:58:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-23 16:58:10,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708081794] [2020-12-23 16:58:10,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217010726] [2020-12-23 16:58:10,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:16,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:58:16,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:16,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:58:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-23 16:58:16,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:16,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2020-12-23 16:58:16,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19921158] [2020-12-23 16:58:16,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:58:16,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:16,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:58:16,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=913, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:58:16,816 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 39 states. [2020-12-23 16:58:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:17,058 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2020-12-23 16:58:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:58:17,058 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-12-23 16:58:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:17,059 INFO L225 Difference]: With dead ends: 131 [2020-12-23 16:58:17,059 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 16:58:17,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=608, Invalid=952, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:58:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 16:58:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-12-23 16:58:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 16:58:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-12-23 16:58:17,064 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 115 [2020-12-23 16:58:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:17,065 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-12-23 16:58:17,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:58:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-12-23 16:58:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 16:58:17,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:17,066 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:17,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 16:58:17,280 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:58:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:17,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1834944254, now seen corresponding path program 11 times [2020-12-23 16:58:17,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:17,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297027617] [2020-12-23 16:58:17,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 16:58:17,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297027617] [2020-12-23 16:58:17,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799078785] [2020-12-23 16:58:17,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:00,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 16:59:00,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:00,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:59:00,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 16:59:00,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:00,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 16:59:00,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201904478] [2020-12-23 16:59:00,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:59:00,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:00,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:59:00,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:59:00,224 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 22 states. [2020-12-23 16:59:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:00,391 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-12-23 16:59:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:59:00,391 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-12-23 16:59:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:00,395 INFO L225 Difference]: With dead ends: 138 [2020-12-23 16:59:00,395 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 16:59:00,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:59:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 16:59:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-12-23 16:59:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 16:59:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-12-23 16:59:00,399 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 121 [2020-12-23 16:59:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:00,399 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-12-23 16:59:00,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:59:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-12-23 16:59:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 16:59:00,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:00,401 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:00,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 16:59:00,602 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:59:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:00,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2023164607, now seen corresponding path program 12 times [2020-12-23 16:59:00,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:00,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026655185] [2020-12-23 16:59:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 16:59:00,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026655185] [2020-12-23 16:59:00,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675845343] [2020-12-23 16:59:00,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:07,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-23 16:59:07,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:07,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 16:59:07,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 16:59:08,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:08,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 16:59:08,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210092424] [2020-12-23 16:59:08,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:59:08,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:08,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:59:08,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:59:08,055 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 23 states. [2020-12-23 16:59:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:08,260 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2020-12-23 16:59:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:59:08,261 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 124 [2020-12-23 16:59:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:08,262 INFO L225 Difference]: With dead ends: 145 [2020-12-23 16:59:08,262 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 16:59:08,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:59:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 16:59:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2020-12-23 16:59:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 16:59:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-12-23 16:59:08,266 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2020-12-23 16:59:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:08,266 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-12-23 16:59:08,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:59:08,267 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-12-23 16:59:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 16:59:08,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:08,268 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:08,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:59:08,469 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:59:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:08,470 INFO L82 PathProgramCache]: Analyzing trace with hash -68412254, now seen corresponding path program 13 times [2020-12-23 16:59:08,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:08,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6994502] [2020-12-23 16:59:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 16:59:08,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6994502] [2020-12-23 16:59:08,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001397909] [2020-12-23 16:59:08,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:08,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 16:59:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 16:59:09,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:09,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2020-12-23 16:59:09,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943948562] [2020-12-23 16:59:09,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 16:59:09,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:09,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 16:59:09,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=1096, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:59:09,285 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 43 states. [2020-12-23 16:59:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:09,664 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2020-12-23 16:59:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:59:09,664 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-12-23 16:59:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:09,665 INFO L225 Difference]: With dead ends: 149 [2020-12-23 16:59:09,665 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 16:59:09,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=803, Invalid=1267, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:59:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 16:59:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-12-23 16:59:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 16:59:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-12-23 16:59:09,670 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 127 [2020-12-23 16:59:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:09,670 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-12-23 16:59:09,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 16:59:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-12-23 16:59:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 16:59:09,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:09,672 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:09,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:09,887 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:59:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:09,888 INFO L82 PathProgramCache]: Analyzing trace with hash 230088391, now seen corresponding path program 14 times [2020-12-23 16:59:09,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:09,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640558612] [2020-12-23 16:59:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 16:59:10,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640558612] [2020-12-23 16:59:10,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345607756] [2020-12-23 16:59:10,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:10,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:59:10,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:10,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:59:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 16:59:10,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:10,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2020-12-23 16:59:10,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403803916] [2020-12-23 16:59:10,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 16:59:10,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:10,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 16:59:10,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=1335, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 16:59:10,813 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 47 states. [2020-12-23 16:59:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:11,108 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2020-12-23 16:59:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:59:11,108 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-12-23 16:59:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:11,109 INFO L225 Difference]: With dead ends: 155 [2020-12-23 16:59:11,109 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 16:59:11,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=874, Invalid=1382, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:59:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 16:59:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2020-12-23 16:59:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 16:59:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-12-23 16:59:11,114 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 139 [2020-12-23 16:59:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:11,115 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-12-23 16:59:11,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 16:59:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-12-23 16:59:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-23 16:59:11,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:11,117 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:11,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 16:59:11,330 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:59:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:11,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1821273026, now seen corresponding path program 15 times [2020-12-23 16:59:11,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:11,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428551519] [2020-12-23 16:59:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-23 16:59:11,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428551519] [2020-12-23 16:59:11,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074626988] [2020-12-23 16:59:11,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:28,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-12-23 16:59:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:28,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 16:59:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-23 16:59:29,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:29,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2020-12-23 16:59:29,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395189077] [2020-12-23 16:59:29,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 16:59:29,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:29,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 16:59:29,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=1453, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 16:59:29,086 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 49 states. [2020-12-23 16:59:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:29,444 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2020-12-23 16:59:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:59:29,445 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-12-23 16:59:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:29,446 INFO L225 Difference]: With dead ends: 161 [2020-12-23 16:59:29,446 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 16:59:29,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=948, Invalid=1502, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:59:29,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 16:59:29,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-12-23 16:59:29,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 16:59:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-12-23 16:59:29,451 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 145 [2020-12-23 16:59:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:29,451 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-12-23 16:59:29,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 16:59:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-12-23 16:59:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 16:59:29,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:29,452 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:29,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 16:59:29,668 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 16:59:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1610705817, now seen corresponding path program 16 times [2020-12-23 16:59:29,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:29,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26692101] [2020-12-23 16:59:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-23 16:59:30,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26692101] [2020-12-23 16:59:30,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969526846] [2020-12-23 16:59:30,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:00:18,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:00:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:00:18,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 17:00:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:00:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-23 17:00:19,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:00:19,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2020-12-23 17:00:19,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260091067] [2020-12-23 17:00:19,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 17:00:19,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:00:19,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 17:00:19,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=1576, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 17:00:19,149 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 51 states. [2020-12-23 17:00:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:00:19,527 INFO L93 Difference]: Finished difference Result 167 states and 168 transitions. [2020-12-23 17:00:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 17:00:19,527 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-12-23 17:00:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:00:19,528 INFO L225 Difference]: With dead ends: 167 [2020-12-23 17:00:19,529 INFO L226 Difference]: Without dead ends: 167 [2020-12-23 17:00:19,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1025, Invalid=1627, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 17:00:19,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-23 17:00:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2020-12-23 17:00:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 17:00:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2020-12-23 17:00:19,533 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 151 [2020-12-23 17:00:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:00:19,534 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2020-12-23 17:00:19,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 17:00:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2020-12-23 17:00:19,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-23 17:00:19,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:00:19,535 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:00:19,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:00:19,736 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:00:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:00:19,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1765206306, now seen corresponding path program 17 times [2020-12-23 17:00:19,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:00:19,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477164625] [2020-12-23 17:00:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:00:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:00:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-23 17:00:20,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477164625] [2020-12-23 17:00:20,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589557989] [2020-12-23 17:00:20,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true