/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_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:02:34,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:02:34,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:02:34,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:02:34,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:02:34,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:02:34,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:02:34,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:02:34,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:02:34,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:02:34,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:02:34,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:02:34,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:02:34,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:02:34,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:02:34,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:02:34,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:02:34,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:02:34,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:02:34,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:02:34,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:02:34,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:02:34,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:02:34,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:02:34,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:02:34,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:02:34,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:02:34,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:02:34,557 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 00:02:34,606 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:02:34,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:02:34,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:02:34,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:02:34,610 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:02:34,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:02:34,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:02:34,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:02:34,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:02:34,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:02:34,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:02:34,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:02:34,612 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:02:34,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:02:34,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:02:34,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:02:34,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:02:34,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:02:34,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:02:34,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:02:34,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:02:34,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:02:34,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:02:34,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:02:34,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:02:34,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:02:35,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:02:35,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:02:35,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:02:35,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:02:35,106 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:02:35,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2020-12-23 00:02:35,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4a44cd096/fbd61f16b64c463a9eb8dc5ff5330c97/FLAG310ebf68e [2020-12-23 00:02:35,950 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:02:35,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2020-12-23 00:02:35,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4a44cd096/fbd61f16b64c463a9eb8dc5ff5330c97/FLAG310ebf68e [2020-12-23 00:02:36,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4a44cd096/fbd61f16b64c463a9eb8dc5ff5330c97 [2020-12-23 00:02:36,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:02:36,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:02:36,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:02:36,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:02:36,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:02:36,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56949794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36, skipping insertion in model container [2020-12-23 00:02:36,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:02:36,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:02:36,480 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_init6_ground-2.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[~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 00:02:36,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:02:36,513 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:02:36,528 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_init6_ground-2.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[~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 00:02:36,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:02:36,558 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:02:36,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36 WrapperNode [2020-12-23 00:02:36,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:02:36,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:02:36,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:02:36,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:02:36,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:02:36,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:02:36,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:02:36,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:02:36,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (1/1) ... [2020-12-23 00:02:36,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:02:36,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:02:36,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:02:36,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:02:36,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (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 00:02:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:02:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:02:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:02:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:02:36,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:02:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:02:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:02:37,023 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:02:37,023 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 00:02:37,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:02:37 BoogieIcfgContainer [2020-12-23 00:02:37,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:02:37,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:02:37,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:02:37,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:02:37,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:02:36" (1/3) ... [2020-12-23 00:02:37,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5579e633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:02:37, skipping insertion in model container [2020-12-23 00:02:37,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:36" (2/3) ... [2020-12-23 00:02:37,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5579e633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:02:37, skipping insertion in model container [2020-12-23 00:02:37,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:02:37" (3/3) ... [2020-12-23 00:02:37,036 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2020-12-23 00:02:37,044 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:02:37,049 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:02:37,071 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:02:37,104 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:02:37,104 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:02:37,104 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:02:37,105 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:02:37,105 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:02:37,105 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:02:37,105 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:02:37,105 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:02:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 00:02:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:02:37,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:37,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:37,141 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1501159767, now seen corresponding path program 1 times [2020-12-23 00:02:37,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:37,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498750129] [2020-12-23 00:02:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:37,476 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 00:02:37,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498750129] [2020-12-23 00:02:37,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:02:37,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:02:37,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332558320] [2020-12-23 00:02:37,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:02:37,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:37,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:02:37,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:02:37,503 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-12-23 00:02:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:37,579 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2020-12-23 00:02:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:02:37,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:02:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:37,592 INFO L225 Difference]: With dead ends: 51 [2020-12-23 00:02:37,593 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:02:37,596 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 00:02:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:02:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 00:02:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:02:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-23 00:02:37,642 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2020-12-23 00:02:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:37,642 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-23 00:02:37,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:02:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-23 00:02:37,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:02:37,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:37,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:37,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:02:37,645 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1833326096, now seen corresponding path program 1 times [2020-12-23 00:02:37,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:37,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819541865] [2020-12-23 00:02:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:02:37,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819541865] [2020-12-23 00:02:37,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353317766] [2020-12-23 00:02:37,756 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 00:02:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:02:37,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:02:38,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:38,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:02:38,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081341992] [2020-12-23 00:02:38,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:02:38,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:38,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:02:38,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:02:38,009 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2020-12-23 00:02:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:38,149 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-12-23 00:02:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:02:38,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-23 00:02:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:38,150 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:02:38,151 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:02:38,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 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 00:02:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:02:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 00:02:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 00:02:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-12-23 00:02:38,159 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2020-12-23 00:02:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:38,160 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-12-23 00:02:38,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:02:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-12-23 00:02:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:02:38,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:38,162 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:38,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:02:38,377 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:38,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:38,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1605379405, now seen corresponding path program 2 times [2020-12-23 00:02:38,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:38,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161974659] [2020-12-23 00:02:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 00:02:38,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161974659] [2020-12-23 00:02:38,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567534606] [2020-12-23 00:02:38,522 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 00:02:38,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:02:38,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:38,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:02:38,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 00:02:38,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:38,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:02:38,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827944636] [2020-12-23 00:02:38,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:02:38,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:38,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:02:38,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:02:38,666 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2020-12-23 00:02:38,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:38,745 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-12-23 00:02:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:02:38,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-23 00:02:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:38,747 INFO L225 Difference]: With dead ends: 65 [2020-12-23 00:02:38,747 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 00:02:38,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 00:02:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 00:02:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 00:02:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:02:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-12-23 00:02:38,759 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2020-12-23 00:02:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:38,760 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-12-23 00:02:38,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:02:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-12-23 00:02:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:02:38,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:38,762 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:38,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:38,978 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:38,979 INFO L82 PathProgramCache]: Analyzing trace with hash 777570992, now seen corresponding path program 3 times [2020-12-23 00:02:38,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:38,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417238166] [2020-12-23 00:02:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 00:02:39,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417238166] [2020-12-23 00:02:39,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327793327] [2020-12-23 00:02:39,108 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 00:02:39,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:02:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:39,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:02:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 00:02:39,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:39,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:02:39,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304507834] [2020-12-23 00:02:39,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:02:39,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:02:39,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:02:39,318 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-12-23 00:02:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:39,415 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2020-12-23 00:02:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:02:39,416 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-23 00:02:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:39,417 INFO L225 Difference]: With dead ends: 76 [2020-12-23 00:02:39,417 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 00:02:39,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 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 00:02:39,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 00:02:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 00:02:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 00:02:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-12-23 00:02:39,427 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2020-12-23 00:02:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:39,427 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-12-23 00:02:39,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:02:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-12-23 00:02:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:02:39,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:39,429 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:39,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:39,643 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:39,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:39,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1875666669, now seen corresponding path program 4 times [2020-12-23 00:02:39,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:39,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76182617] [2020-12-23 00:02:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 00:02:39,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76182617] [2020-12-23 00:02:39,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042801458] [2020-12-23 00:02:39,741 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 00:02:39,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:02:39,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:02:39,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 00:02:39,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:39,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:02:39,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642716038] [2020-12-23 00:02:39,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:02:39,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:39,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:02:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:02:39,918 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2020-12-23 00:02:40,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:40,025 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2020-12-23 00:02:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:02:40,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-23 00:02:40,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:40,027 INFO L225 Difference]: With dead ends: 87 [2020-12-23 00:02:40,027 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:02:40,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 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 00:02:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:02:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 00:02:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 00:02:40,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-12-23 00:02:40,036 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 41 [2020-12-23 00:02:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:40,037 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-12-23 00:02:40,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:02:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-12-23 00:02:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:02:40,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:40,038 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:40,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:40,252 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:40,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:40,253 INFO L82 PathProgramCache]: Analyzing trace with hash 742123344, now seen corresponding path program 5 times [2020-12-23 00:02:40,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:40,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706882362] [2020-12-23 00:02:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-23 00:02:40,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706882362] [2020-12-23 00:02:40,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531936569] [2020-12-23 00:02:40,335 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 00:02:41,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 00:02:41,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:41,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:02:41,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-23 00:02:41,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:41,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:02:41,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134860170] [2020-12-23 00:02:41,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:02:41,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:41,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:02:41,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:02:41,207 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 9 states. [2020-12-23 00:02:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:41,320 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2020-12-23 00:02:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:02:41,321 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-12-23 00:02:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:41,325 INFO L225 Difference]: With dead ends: 98 [2020-12-23 00:02:41,325 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 00:02:41,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 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 00:02:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 00:02:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 00:02:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:02:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-12-23 00:02:41,347 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2020-12-23 00:02:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:41,347 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-12-23 00:02:41,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:02:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-12-23 00:02:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 00:02:41,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:41,354 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:41,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:02:41,555 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:41,556 INFO L82 PathProgramCache]: Analyzing trace with hash 786050931, now seen corresponding path program 6 times [2020-12-23 00:02:41,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:41,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794862933] [2020-12-23 00:02:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-23 00:02:41,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794862933] [2020-12-23 00:02:41,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166401238] [2020-12-23 00:02:41,654 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 00:02:42,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 00:02:42,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:02:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-23 00:02:42,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:42,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:02:42,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628028015] [2020-12-23 00:02:42,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:02:42,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:42,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:02:42,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:02:42,370 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2020-12-23 00:02:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:42,487 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2020-12-23 00:02:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:02:42,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-12-23 00:02:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:42,488 INFO L225 Difference]: With dead ends: 109 [2020-12-23 00:02:42,489 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:02:42,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 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 00:02:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:02:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-23 00:02:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:02:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-23 00:02:42,496 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 53 [2020-12-23 00:02:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:42,497 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-23 00:02:42,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:02:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-23 00:02:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:02:42,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:42,498 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:42,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:42,713 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:42,714 INFO L82 PathProgramCache]: Analyzing trace with hash 518106096, now seen corresponding path program 7 times [2020-12-23 00:02:42,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:42,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742273622] [2020-12-23 00:02:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:02:42,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742273622] [2020-12-23 00:02:42,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281781387] [2020-12-23 00:02:42,827 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 00:02:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:42,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:02:42,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:02:42,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:42,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:02:42,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349883790] [2020-12-23 00:02:42,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:02:42,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:42,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:02:42,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:02:42,985 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-12-23 00:02:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:43,125 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2020-12-23 00:02:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:02:43,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-12-23 00:02:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:43,127 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:02:43,127 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:02:43,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 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 00:02:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:02:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-23 00:02:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:02:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-12-23 00:02:43,135 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 59 [2020-12-23 00:02:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:43,135 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-12-23 00:02:43,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:02:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-12-23 00:02:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:02:43,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:43,136 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:43,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:43,348 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:43,349 INFO L82 PathProgramCache]: Analyzing trace with hash -820929069, now seen corresponding path program 8 times [2020-12-23 00:02:43,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:43,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327129575] [2020-12-23 00:02:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-23 00:02:43,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327129575] [2020-12-23 00:02:43,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574466019] [2020-12-23 00:02:43,530 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 00:02:43,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:02:43,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:43,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:02:43,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-23 00:02:43,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:43,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:02:43,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413704092] [2020-12-23 00:02:43,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:02:43,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:43,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:02:43,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:02:43,710 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 12 states. [2020-12-23 00:02:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:43,839 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2020-12-23 00:02:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:02:43,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-12-23 00:02:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:43,840 INFO L225 Difference]: With dead ends: 131 [2020-12-23 00:02:43,840 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 00:02:43,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 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 00:02:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 00:02:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-23 00:02:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 00:02:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-12-23 00:02:43,849 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 65 [2020-12-23 00:02:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:43,849 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-12-23 00:02:43,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:02:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-12-23 00:02:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:02:43,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:43,850 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:44,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:02:44,064 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:44,065 INFO L82 PathProgramCache]: Analyzing trace with hash 884742288, now seen corresponding path program 9 times [2020-12-23 00:02:44,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:44,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025760440] [2020-12-23 00:02:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 00:02:44,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025760440] [2020-12-23 00:02:44,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354333889] [2020-12-23 00:02:44,205 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 00:02:50,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:02:50,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:02:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 00:02:51,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:51,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:02:51,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855418006] [2020-12-23 00:02:51,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:02:51,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:02:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:02:51,055 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 13 states. [2020-12-23 00:02:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:51,192 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2020-12-23 00:02:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:02:51,192 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-12-23 00:02:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:51,193 INFO L225 Difference]: With dead ends: 142 [2020-12-23 00:02:51,193 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 00:02:51,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 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 00:02:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 00:02:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-23 00:02:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:02:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-12-23 00:02:51,202 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 71 [2020-12-23 00:02:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:51,203 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-12-23 00:02:51,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:02:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-12-23 00:02:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:02:51,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:51,204 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:51,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:51,405 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash 489153587, now seen corresponding path program 10 times [2020-12-23 00:02:51,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:51,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088560585] [2020-12-23 00:02:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-23 00:02:51,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088560585] [2020-12-23 00:02:51,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325731042] [2020-12-23 00:02:51,616 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 00:02:51,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:02:51,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:02:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-23 00:02:51,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:51,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:02:51,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799427190] [2020-12-23 00:02:51,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:02:51,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:51,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:02:51,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:02:51,807 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 14 states. [2020-12-23 00:02:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:51,981 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2020-12-23 00:02:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:02:51,982 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-12-23 00:02:51,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:51,982 INFO L225 Difference]: With dead ends: 153 [2020-12-23 00:02:51,983 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:02:51,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 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 00:02:51,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:02:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-23 00:02:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 00:02:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2020-12-23 00:02:51,996 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 77 [2020-12-23 00:02:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:51,996 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2020-12-23 00:02:51,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:02:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2020-12-23 00:02:51,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 00:02:51,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:51,998 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:52,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:52,215 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:52,216 INFO L82 PathProgramCache]: Analyzing trace with hash 851258672, now seen corresponding path program 11 times [2020-12-23 00:02:52,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:52,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755311586] [2020-12-23 00:02:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:02:52,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755311586] [2020-12-23 00:02:52,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506996848] [2020-12-23 00:02:52,423 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