/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-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:02:28,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:02:28,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:02:28,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:02:28,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:02:28,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:02:28,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:02:28,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:02:28,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:02:28,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:02:28,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:02:28,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:02:28,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:02:28,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:02:28,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:02:28,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:02:28,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:02:28,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:02:28,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:02:28,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:02:28,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:02:28,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:02:28,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:02:28,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:02:28,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:02:28,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:02:28,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:02:28,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:02:28,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:02:28,762 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:02:28,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:02:28,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:02:28,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:02:28,764 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:02:28,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:02:28,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:02:28,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:02:28,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:02:28,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:02:28,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:02:28,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:02:28,767 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:02:28,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:02:28,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:02:28,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:02:28,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:02:28,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:02:28,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:02:28,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:02:28,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:02:28,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:02:28,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:02:28,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:02:28,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:02:28,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:02:29,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:02:29,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:02:29,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:02:29,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:02:29,260 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:02:29,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init5_ground-1.i [2020-12-23 00:02:29,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1f94e6561/fe08a2ca9d4f497199a4bcd935be61a7/FLAG05d66d683 [2020-12-23 00:02:30,092 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:02:30,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init5_ground-1.i [2020-12-23 00:02:30,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1f94e6561/fe08a2ca9d4f497199a4bcd935be61a7/FLAG05d66d683 [2020-12-23 00:02:30,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1f94e6561/fe08a2ca9d4f497199a4bcd935be61a7 [2020-12-23 00:02:30,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:02:30,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:02:30,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:02:30,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:02:30,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:02:30,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d2928a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30, skipping insertion in model container [2020-12-23 00:02:30,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:02:30,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:02:30,698 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init5_ground-1.i[816,829] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:02:30,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:02:30,733 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:02:30,749 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init5_ground-1.i[816,829] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:02:30,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:02:30,776 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:02:30,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30 WrapperNode [2020-12-23 00:02:30,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:02:30,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:02:30,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:02:30,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:02:30,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:02:30,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:02:30,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:02:30,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:02:30,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (1/1) ... [2020-12-23 00:02:30,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:02:30,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:02:30,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:02:30,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:02:30,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (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 00:02:30,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:02:30,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:02:31,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:02:31,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:02:31,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:02:31,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:02:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:02:31,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:02:31,384 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 00:02:31,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:02:31 BoogieIcfgContainer [2020-12-23 00:02:31,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:02:31,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:02:31,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:02:31,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:02:31,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:02:30" (1/3) ... [2020-12-23 00:02:31,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2560d631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:02:31, skipping insertion in model container [2020-12-23 00:02:31,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:30" (2/3) ... [2020-12-23 00:02:31,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2560d631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:02:31, skipping insertion in model container [2020-12-23 00:02:31,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:02:31" (3/3) ... [2020-12-23 00:02:31,398 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2020-12-23 00:02:31,406 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:02:31,433 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:02:31,456 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:02:31,506 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:02:31,506 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:02:31,506 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:02:31,506 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:02:31,506 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:02:31,507 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:02:31,507 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:02:31,510 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:02:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-23 00:02:31,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:02:31,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:31,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:31,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:31,575 INFO L82 PathProgramCache]: Analyzing trace with hash 846254768, now seen corresponding path program 1 times [2020-12-23 00:02:31,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:31,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294114294] [2020-12-23 00:02:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:31,790 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 00:02:31,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294114294] [2020-12-23 00:02:31,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:02:31,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:02:31,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739129002] [2020-12-23 00:02:31,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:02:31,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:31,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:02:31,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:02:31,821 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-12-23 00:02:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:31,921 INFO L93 Difference]: Finished difference Result 46 states and 78 transitions. [2020-12-23 00:02:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:02:31,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-12-23 00:02:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:31,935 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:02:31,935 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 00:02:31,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:02:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 00:02:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 00:02:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:02:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-23 00:02:31,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2020-12-23 00:02:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:31,982 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-23 00:02:31,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:02:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-23 00:02:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:02:31,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:31,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:31,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:02:31,984 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:31,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1299919835, now seen corresponding path program 1 times [2020-12-23 00:02:31,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:31,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610695857] [2020-12-23 00:02:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:02:32,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610695857] [2020-12-23 00:02:32,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707656687] [2020-12-23 00:02:32,051 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 00:02:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:32,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:02:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:02:32,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:32,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:02:32,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636238377] [2020-12-23 00:02:32,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:02:32,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:32,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:02:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:02:32,270 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-12-23 00:02:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:32,389 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-12-23 00:02:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:02:32,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-23 00:02:32,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:32,391 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:02:32,391 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:02:32,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:02:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:02:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 00:02:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:02:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-23 00:02:32,403 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2020-12-23 00:02:32,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:32,403 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-23 00:02:32,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:02:32,403 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-23 00:02:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:02:32,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:32,407 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:32,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:02:32,608 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:32,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:32,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1276432308, now seen corresponding path program 2 times [2020-12-23 00:02:32,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:32,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255774613] [2020-12-23 00:02:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:02:32,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255774613] [2020-12-23 00:02:32,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327287536] [2020-12-23 00:02:32,733 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 00:02:32,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:02:32,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:32,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:02:32,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:02:32,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:32,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:02:32,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737018277] [2020-12-23 00:02:32,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:02:32,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:02:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:02:32,848 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2020-12-23 00:02:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:32,927 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-12-23 00:02:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:02:32,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-23 00:02:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:32,928 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:02:32,928 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:02:32,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:02:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:02:32,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 00:02:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:02:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-12-23 00:02:32,938 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2020-12-23 00:02:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:32,938 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-12-23 00:02:32,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:02:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-12-23 00:02:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:02:32,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:32,940 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:33,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:33,155 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1067918085, now seen corresponding path program 3 times [2020-12-23 00:02:33,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:33,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65912905] [2020-12-23 00:02:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:02:33,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65912905] [2020-12-23 00:02:33,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859915577] [2020-12-23 00:02:33,252 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 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 00:02:33,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:02:33,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:02:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:02:33,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:33,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:02:33,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321361345] [2020-12-23 00:02:33,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:02:33,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:33,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:02:33,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:02:33,424 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2020-12-23 00:02:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:33,501 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-12-23 00:02:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:02:33,502 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-12-23 00:02:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:33,503 INFO L225 Difference]: With dead ends: 65 [2020-12-23 00:02:33,503 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 00:02:33,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:02:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 00:02:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 00:02:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:02:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-23 00:02:33,511 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 30 [2020-12-23 00:02:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:33,511 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-23 00:02:33,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:02:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-23 00:02:33,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:02:33,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:33,513 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:33,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:33,728 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1604238356, now seen corresponding path program 4 times [2020-12-23 00:02:33,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:33,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577224373] [2020-12-23 00:02:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 00:02:33,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577224373] [2020-12-23 00:02:33,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9357026] [2020-12-23 00:02:33,886 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 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 00:02:33,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:02:33,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:33,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:02:33,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 00:02:34,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:34,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:02:34,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293756271] [2020-12-23 00:02:34,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:02:34,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:02:34,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:02:34,004 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2020-12-23 00:02:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:34,092 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-12-23 00:02:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:02:34,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-12-23 00:02:34,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:34,094 INFO L225 Difference]: With dead ends: 74 [2020-12-23 00:02:34,094 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 00:02:34,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:02:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 00:02:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 00:02:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:02:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-12-23 00:02:34,102 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 35 [2020-12-23 00:02:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:34,102 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-12-23 00:02:34,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:02:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-12-23 00:02:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 00:02:34,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:34,104 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:34,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:34,319 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash 313549285, now seen corresponding path program 5 times [2020-12-23 00:02:34,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:34,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671360580] [2020-12-23 00:02:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-23 00:02:34,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671360580] [2020-12-23 00:02:34,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686269750] [2020-12-23 00:02:34,475 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 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 00:02:35,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 00:02:35,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:35,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:02:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-23 00:02:36,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:36,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:02:36,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24643269] [2020-12-23 00:02:36,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:02:36,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:36,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:02:36,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:02:36,058 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2020-12-23 00:02:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:36,164 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-12-23 00:02:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:02:36,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-12-23 00:02:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:36,166 INFO L225 Difference]: With dead ends: 83 [2020-12-23 00:02:36,166 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 00:02:36,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:02:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 00:02:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 00:02:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:02:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-23 00:02:36,198 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 40 [2020-12-23 00:02:36,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:36,199 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-23 00:02:36,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:02:36,199 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-23 00:02:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:02:36,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:36,206 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:36,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:02:36,407 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:36,408 INFO L82 PathProgramCache]: Analyzing trace with hash 355512204, now seen corresponding path program 6 times [2020-12-23 00:02:36,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:36,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038257072] [2020-12-23 00:02:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-23 00:02:36,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038257072] [2020-12-23 00:02:36,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251905328] [2020-12-23 00:02:36,546 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 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 00:02:37,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 00:02:37,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:37,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:02:37,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-23 00:02:37,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:37,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:02:37,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418652727] [2020-12-23 00:02:37,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:02:37,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:02:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:02:37,609 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 10 states. [2020-12-23 00:02:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:37,726 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-12-23 00:02:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:02:37,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-12-23 00:02:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:37,734 INFO L225 Difference]: With dead ends: 92 [2020-12-23 00:02:37,734 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 00:02:37,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:02:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 00:02:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 00:02:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 00:02:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-12-23 00:02:37,749 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 45 [2020-12-23 00:02:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:37,750 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-12-23 00:02:37,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:02:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-12-23 00:02:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 00:02:37,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:37,751 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:37,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:37,964 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash -215316283, now seen corresponding path program 7 times [2020-12-23 00:02:37,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:37,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806104324] [2020-12-23 00:02:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 00:02:38,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806104324] [2020-12-23 00:02:38,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964036082] [2020-12-23 00:02:38,096 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 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 00:02:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:38,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:02:38,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 00:02:38,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:38,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:02:38,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854368558] [2020-12-23 00:02:38,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:02:38,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:38,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:02:38,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:02:38,298 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 11 states. [2020-12-23 00:02:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:38,427 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2020-12-23 00:02:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:02:38,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-12-23 00:02:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:38,428 INFO L225 Difference]: With dead ends: 101 [2020-12-23 00:02:38,429 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 00:02:38,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:02:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 00:02:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 00:02:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 00:02:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-12-23 00:02:38,437 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 50 [2020-12-23 00:02:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:38,437 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-12-23 00:02:38,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:02:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-12-23 00:02:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:02:38,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:38,439 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:38,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:38,654 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:38,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1821412564, now seen corresponding path program 8 times [2020-12-23 00:02:38,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:38,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522006571] [2020-12-23 00:02:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:02:38,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522006571] [2020-12-23 00:02:38,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902972274] [2020-12-23 00:02:38,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:38,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:02:38,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:38,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:02:38,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:02:39,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:39,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:02:39,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661835216] [2020-12-23 00:02:39,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:02:39,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:39,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:02:39,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:02:39,026 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 12 states. [2020-12-23 00:02:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:39,153 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-12-23 00:02:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:02:39,154 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-12-23 00:02:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:39,154 INFO L225 Difference]: With dead ends: 110 [2020-12-23 00:02:39,154 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 00:02:39,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:02:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 00:02:39,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 00:02:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:02:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-12-23 00:02:39,163 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 55 [2020-12-23 00:02:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:39,163 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-12-23 00:02:39,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:02:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-12-23 00:02:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 00:02:39,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:39,165 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:39,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:02:39,380 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash 622827429, now seen corresponding path program 9 times [2020-12-23 00:02:39,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:39,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983452176] [2020-12-23 00:02:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-23 00:02:39,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983452176] [2020-12-23 00:02:39,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704925181] [2020-12-23 00:02:39,605 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 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 00:02:43,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:02:43,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:43,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:02:43,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-23 00:02:43,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:43,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:02:43,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001662220] [2020-12-23 00:02:43,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:02:43,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:43,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:02:43,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:02:43,633 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 13 states. [2020-12-23 00:02:43,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:43,755 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2020-12-23 00:02:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:02:43,756 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-12-23 00:02:43,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:43,756 INFO L225 Difference]: With dead ends: 119 [2020-12-23 00:02:43,757 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:02:43,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:02:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:02:43,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-23 00:02:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:02:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-12-23 00:02:43,765 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 60 [2020-12-23 00:02:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:43,765 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-12-23 00:02:43,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:02:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-12-23 00:02:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:02:43,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:43,767 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:43,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:43,983 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:43,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1605603020, now seen corresponding path program 10 times [2020-12-23 00:02:43,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:43,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074142808] [2020-12-23 00:02:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-12-23 00:02:44,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074142808] [2020-12-23 00:02:44,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284771637] [2020-12-23 00:02:44,135 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 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 00:02:44,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:02:44,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:44,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:02:44,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-12-23 00:02:44,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:44,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:02:44,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549368422] [2020-12-23 00:02:44,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:02:44,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:44,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:02:44,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:02:44,349 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 14 states. [2020-12-23 00:02:44,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:44,489 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2020-12-23 00:02:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:02:44,489 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-12-23 00:02:44,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:44,490 INFO L225 Difference]: With dead ends: 128 [2020-12-23 00:02:44,490 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:02:44,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:02:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:02:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-23 00:02:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 00:02:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-12-23 00:02:44,499 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 65 [2020-12-23 00:02:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:44,499 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-12-23 00:02:44,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:02:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-12-23 00:02:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 00:02:44,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:44,501 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:44,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:44,717 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:44,719 INFO L82 PathProgramCache]: Analyzing trace with hash 152669829, now seen corresponding path program 11 times [2020-12-23 00:02:44,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:44,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266887318] [2020-12-23 00:02:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-12-23 00:02:44,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266887318] [2020-12-23 00:02:44,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373836261] [2020-12-23 00:02:44,919 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 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