/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-178dd20 [2021-01-06 09:51:54,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:51:54,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:51:54,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:51:54,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:51:54,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:51:54,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:51:55,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:51:55,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:51:55,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:51:55,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:51:55,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:51:55,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:51:55,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:51:55,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:51:55,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:51:55,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:51:55,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:51:55,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:51:55,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:51:55,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:51:55,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:51:55,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:51:55,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:51:55,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:51:55,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:51:55,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:51:55,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:51:55,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:51:55,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:51:55,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:51:55,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:51:55,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:51:55,141 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:51:55,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:51:55,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:51:55,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:51:55,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:51:55,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:51:55,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:51:55,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:51:55,144 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:51:55,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:51:55,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:51:55,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:51:55,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:51:55,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:51:55,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:51:55,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:51:55,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:51:55,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:51:55,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:51:55,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:51:55,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:51:55,146 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:51:55,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:51:55,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:51:55,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:51:55,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:51:55,618 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:51:55,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init5_ground-1.i [2021-01-06 09:51:55,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/25c99a891/4a1b64c163534e48a73ead9e4f73d52c/FLAG60d78a516 [2021-01-06 09:51:56,280 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:51:56,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init5_ground-1.i [2021-01-06 09:51:56,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/25c99a891/4a1b64c163534e48a73ead9e4f73d52c/FLAG60d78a516 [2021-01-06 09:51:56,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/25c99a891/4a1b64c163534e48a73ead9e4f73d52c [2021-01-06 09:51:56,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:51:56,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:51:56,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:51:56,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:51:56,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:51:56,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:56,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2566b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56, skipping insertion in model container [2021-01-06 09:51:56,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:56,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:51:56,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:51:56,860 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,] [2021-01-06 09:51:56,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:51:56,887 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:51:56,902 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,] [2021-01-06 09:51:56,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:51:56,931 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:51:56,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56 WrapperNode [2021-01-06 09:51:56,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:51:56,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:51:56,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:51:56,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:51:56,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:56,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:56,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:51:56,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:51:56,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:51:56,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:51:56,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:56,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:56,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:56,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:56,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:56,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:57,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (1/1) ... [2021-01-06 09:51:57,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:51:57,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:51:57,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:51:57,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:51:57,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (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 [2021-01-06 09:51:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:51:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:51:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:51:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:51:57,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:51:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:51:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:51:57,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:51:57,463 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 09:51:57,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:51:57 BoogieIcfgContainer [2021-01-06 09:51:57,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:51:57,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:51:57,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:51:57,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:51:57,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:51:56" (1/3) ... [2021-01-06 09:51:57,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7018cb14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:51:57, skipping insertion in model container [2021-01-06 09:51:57,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:56" (2/3) ... [2021-01-06 09:51:57,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7018cb14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:51:57, skipping insertion in model container [2021-01-06 09:51:57,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:51:57" (3/3) ... [2021-01-06 09:51:57,503 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2021-01-06 09:51:57,524 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:51:57,535 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:51:57,586 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:51:57,647 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:51:57,648 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:51:57,648 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:51:57,651 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:51:57,651 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:51:57,652 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:51:57,652 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:51:57,652 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:51:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-01-06 09:51:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 09:51:57,699 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:57,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:57,702 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:57,720 INFO L82 PathProgramCache]: Analyzing trace with hash 846254768, now seen corresponding path program 1 times [2021-01-06 09:51:57,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:57,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126254964] [2021-01-06 09:51:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:51:58,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126254964] [2021-01-06 09:51:58,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:51:58,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:51:58,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749985377] [2021-01-06 09:51:58,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:51:58,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:51:58,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:51:58,075 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2021-01-06 09:51:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:58,216 INFO L93 Difference]: Finished difference Result 46 states and 78 transitions. [2021-01-06 09:51:58,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:51:58,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 09:51:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:58,238 INFO L225 Difference]: With dead ends: 46 [2021-01-06 09:51:58,238 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 09:51:58,242 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 [2021-01-06 09:51:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 09:51:58,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 09:51:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 09:51:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 09:51:58,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2021-01-06 09:51:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:58,284 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 09:51:58,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:51:58,284 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 09:51:58,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 09:51:58,285 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:58,285 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] [2021-01-06 09:51:58,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:51:58,286 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:58,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:58,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1299919835, now seen corresponding path program 1 times [2021-01-06 09:51:58,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:58,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279390813] [2021-01-06 09:51:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:51:58,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279390813] [2021-01-06 09:51:58,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432806504] [2021-01-06 09:51:58,338 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 [2021-01-06 09:51:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:51:58,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:51:58,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:58,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:51:58,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821999301] [2021-01-06 09:51:58,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:51:58,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:58,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:51:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:51:58,495 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2021-01-06 09:51:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:58,559 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2021-01-06 09:51:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:51:58,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2021-01-06 09:51:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:58,561 INFO L225 Difference]: With dead ends: 47 [2021-01-06 09:51:58,561 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 09:51:58,562 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 [2021-01-06 09:51:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 09:51:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 09:51:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 09:51:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-01-06 09:51:58,570 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2021-01-06 09:51:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:58,570 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-01-06 09:51:58,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:51:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-01-06 09:51:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 09:51:58,571 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:58,571 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] [2021-01-06 09:51:58,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:51:58,786 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:58,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1276432308, now seen corresponding path program 2 times [2021-01-06 09:51:58,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:58,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862734314] [2021-01-06 09:51:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:51:58,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862734314] [2021-01-06 09:51:58,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753956122] [2021-01-06 09:51:58,921 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 [2021-01-06 09:51:58,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:51:58,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:58,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:51:58,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:51:59,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:59,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:51:59,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443143089] [2021-01-06 09:51:59,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:51:59,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:59,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:51:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:51:59,033 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2021-01-06 09:51:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:59,099 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-01-06 09:51:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:51:59,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-01-06 09:51:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:59,101 INFO L225 Difference]: With dead ends: 56 [2021-01-06 09:51:59,101 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 09:51:59,102 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 [2021-01-06 09:51:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 09:51:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 09:51:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 09:51:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-01-06 09:51:59,109 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2021-01-06 09:51:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:59,109 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-01-06 09:51:59,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:51:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-01-06 09:51:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 09:51:59,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:59,111 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] [2021-01-06 09:51:59,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:59,327 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:59,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:59,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1067918085, now seen corresponding path program 3 times [2021-01-06 09:51:59,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:59,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086193602] [2021-01-06 09:51:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 09:51:59,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086193602] [2021-01-06 09:51:59,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801095168] [2021-01-06 09:51:59,413 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 [2021-01-06 09:51:59,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:51:59,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:59,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:51:59,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 09:51:59,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:59,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:51:59,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186923380] [2021-01-06 09:51:59,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:51:59,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:59,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:51:59,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:51:59,605 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2021-01-06 09:51:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:59,671 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2021-01-06 09:51:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:51:59,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2021-01-06 09:51:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:59,673 INFO L225 Difference]: With dead ends: 65 [2021-01-06 09:51:59,673 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 09:51:59,674 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 [2021-01-06 09:51:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 09:51:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 09:51:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 09:51:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-01-06 09:51:59,681 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 30 [2021-01-06 09:51:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:59,681 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-01-06 09:51:59,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:51:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-01-06 09:51:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 09:51:59,683 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:59,683 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] [2021-01-06 09:51:59,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:59,899 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:59,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1604238356, now seen corresponding path program 4 times [2021-01-06 09:51:59,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:59,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764660925] [2021-01-06 09:51:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 09:51:59,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764660925] [2021-01-06 09:51:59,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399435743] [2021-01-06 09:51:59,993 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 [2021-01-06 09:52:00,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:00,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:00,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:52:00,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 09:52:00,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:00,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:52:00,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480731649] [2021-01-06 09:52:00,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:52:00,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:00,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:52:00,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:52:00,108 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2021-01-06 09:52:00,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:00,173 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-01-06 09:52:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:52:00,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-01-06 09:52:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:00,174 INFO L225 Difference]: With dead ends: 74 [2021-01-06 09:52:00,175 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 09:52:00,175 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 [2021-01-06 09:52:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 09:52:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 09:52:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 09:52:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-01-06 09:52:00,181 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 35 [2021-01-06 09:52:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:00,182 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-01-06 09:52:00,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:52:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-01-06 09:52:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 09:52:00,183 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:00,183 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] [2021-01-06 09:52:00,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:00,399 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:00,400 INFO L82 PathProgramCache]: Analyzing trace with hash 313549285, now seen corresponding path program 5 times [2021-01-06 09:52:00,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:00,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340450747] [2021-01-06 09:52:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-01-06 09:52:00,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340450747] [2021-01-06 09:52:00,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847148676] [2021-01-06 09:52:00,555 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 [2021-01-06 09:52:01,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 09:52:01,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:01,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:52:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-01-06 09:52:01,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:01,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:52:01,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387553184] [2021-01-06 09:52:01,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:52:01,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:52:01,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:52:01,986 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2021-01-06 09:52:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:02,060 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2021-01-06 09:52:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:52:02,061 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2021-01-06 09:52:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:02,062 INFO L225 Difference]: With dead ends: 83 [2021-01-06 09:52:02,062 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 09:52:02,063 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 [2021-01-06 09:52:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 09:52:02,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 09:52:02,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 09:52:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-01-06 09:52:02,070 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 40 [2021-01-06 09:52:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:02,070 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-01-06 09:52:02,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:52:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-01-06 09:52:02,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 09:52:02,071 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:02,071 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] [2021-01-06 09:52:02,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:52:02,286 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:02,287 INFO L82 PathProgramCache]: Analyzing trace with hash 355512204, now seen corresponding path program 6 times [2021-01-06 09:52:02,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:02,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015259189] [2021-01-06 09:52:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 09:52:02,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015259189] [2021-01-06 09:52:02,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154473247] [2021-01-06 09:52:02,444 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 [2021-01-06 09:52:03,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 09:52:03,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:03,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:52:03,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 09:52:03,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:03,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:52:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033513312] [2021-01-06 09:52:03,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:52:03,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:52:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:52:03,480 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 10 states. [2021-01-06 09:52:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:03,602 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2021-01-06 09:52:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:52:03,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2021-01-06 09:52:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:03,604 INFO L225 Difference]: With dead ends: 92 [2021-01-06 09:52:03,604 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 09:52:03,605 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 [2021-01-06 09:52:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 09:52:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-01-06 09:52:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 09:52:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-01-06 09:52:03,611 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 45 [2021-01-06 09:52:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:03,612 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-01-06 09:52:03,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:52:03,612 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-01-06 09:52:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 09:52:03,613 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:03,613 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] [2021-01-06 09:52:03,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:03,829 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:03,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:03,830 INFO L82 PathProgramCache]: Analyzing trace with hash -215316283, now seen corresponding path program 7 times [2021-01-06 09:52:03,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:03,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780599058] [2021-01-06 09:52:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 09:52:03,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780599058] [2021-01-06 09:52:03,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435845344] [2021-01-06 09:52:03,943 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 [2021-01-06 09:52:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:04,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:52:04,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 09:52:04,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:04,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:52:04,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399682565] [2021-01-06 09:52:04,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:52:04,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:04,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:52:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:52:04,084 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 11 states. [2021-01-06 09:52:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:04,206 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2021-01-06 09:52:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:52:04,207 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2021-01-06 09:52:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:04,211 INFO L225 Difference]: With dead ends: 101 [2021-01-06 09:52:04,212 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 09:52:04,213 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 [2021-01-06 09:52:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 09:52:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-01-06 09:52:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 09:52:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-01-06 09:52:04,225 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 50 [2021-01-06 09:52:04,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:04,226 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-01-06 09:52:04,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:52:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-01-06 09:52:04,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 09:52:04,227 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:04,227 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] [2021-01-06 09:52:04,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:04,434 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:04,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1821412564, now seen corresponding path program 8 times [2021-01-06 09:52:04,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:04,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038833420] [2021-01-06 09:52:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 09:52:04,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038833420] [2021-01-06 09:52:04,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523442776] [2021-01-06 09:52:04,569 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 [2021-01-06 09:52:04,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:04,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:04,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:52:04,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 09:52:04,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:04,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:52:04,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943907351] [2021-01-06 09:52:04,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:52:04,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:04,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:52:04,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:52:04,710 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 12 states. [2021-01-06 09:52:04,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:04,821 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2021-01-06 09:52:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:52:04,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2021-01-06 09:52:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:04,822 INFO L225 Difference]: With dead ends: 110 [2021-01-06 09:52:04,822 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 09:52:04,823 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 [2021-01-06 09:52:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 09:52:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-06 09:52:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 09:52:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-01-06 09:52:04,833 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 55 [2021-01-06 09:52:04,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:04,834 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-01-06 09:52:04,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:52:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-01-06 09:52:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 09:52:04,835 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:04,835 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] [2021-01-06 09:52:05,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:52:05,046 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:05,047 INFO L82 PathProgramCache]: Analyzing trace with hash 622827429, now seen corresponding path program 9 times [2021-01-06 09:52:05,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:05,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693544854] [2021-01-06 09:52:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-01-06 09:52:05,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693544854] [2021-01-06 09:52:05,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427099841] [2021-01-06 09:52:05,201 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 [2021-01-06 09:52:09,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:52:09,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:09,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:52:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-01-06 09:52:09,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:09,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:52:09,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306962696] [2021-01-06 09:52:09,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:52:09,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:09,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:52:09,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:52:09,271 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 13 states. [2021-01-06 09:52:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:09,408 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2021-01-06 09:52:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:52:09,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2021-01-06 09:52:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:09,409 INFO L225 Difference]: With dead ends: 119 [2021-01-06 09:52:09,410 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 09:52:09,410 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 [2021-01-06 09:52:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 09:52:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-01-06 09:52:09,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 09:52:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-01-06 09:52:09,418 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 60 [2021-01-06 09:52:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:09,418 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-01-06 09:52:09,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:52:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-01-06 09:52:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 09:52:09,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:09,420 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] [2021-01-06 09:52:09,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:09,635 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:09,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1605603020, now seen corresponding path program 10 times [2021-01-06 09:52:09,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:09,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336155277] [2021-01-06 09:52:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-01-06 09:52:09,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336155277] [2021-01-06 09:52:09,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54250278] [2021-01-06 09:52:09,780 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 [2021-01-06 09:52:09,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:09,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:52:09,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-01-06 09:52:09,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:09,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:52:09,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501307142] [2021-01-06 09:52:09,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:52:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:52:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:52:09,939 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 14 states. [2021-01-06 09:52:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:10,074 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2021-01-06 09:52:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:52:10,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2021-01-06 09:52:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:10,076 INFO L225 Difference]: With dead ends: 128 [2021-01-06 09:52:10,076 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 09:52:10,077 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 [2021-01-06 09:52:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 09:52:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-01-06 09:52:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 09:52:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-01-06 09:52:10,084 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 65 [2021-01-06 09:52:10,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:10,084 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-01-06 09:52:10,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:52:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-01-06 09:52:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 09:52:10,085 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:10,086 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] [2021-01-06 09:52:10,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:10,299 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:10,300 INFO L82 PathProgramCache]: Analyzing trace with hash 152669829, now seen corresponding path program 11 times [2021-01-06 09:52:10,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:10,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340691500] [2021-01-06 09:52:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-01-06 09:52:10,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340691500] [2021-01-06 09:52:10,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398338157] [2021-01-06 09:52:10,482 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