/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-industry-pattern/array_of_struct_ptr_mul_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:17:01,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:17:01,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:17:02,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:17:02,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:17:02,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:17:02,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:17:02,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:17:02,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:17:02,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:17:02,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:17:02,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-23 00:17:02,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:17:02,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:17:02,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:17:02,091 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 00:17:02,126 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:17:02,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:17:02,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:17:02,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:17:02,132 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:17:02,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:17:02,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:17:02,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:17:02,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:17:02,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:17:02,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:17:02,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:17:02,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:17:02,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:17:02,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:17:02,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:17:02,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:17:02,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:17:02,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:17:02,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:17:02,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:17:02,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:17:02,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:17:02,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:17:02,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:17:02,138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:17:02,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:17:02,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:17:02,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:17:02,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:17:02,664 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:17:02,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i [2020-12-23 00:17:02,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/16a43d24c/7569a4e4b0404ab0aadaa3ef3c846d4c/FLAG712d90351 [2020-12-23 00:17:03,504 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:17:03,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i [2020-12-23 00:17:03,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/16a43d24c/7569a4e4b0404ab0aadaa3ef3c846d4c/FLAG712d90351 [2020-12-23 00:17:03,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/16a43d24c/7569a4e4b0404ab0aadaa3ef3c846d4c [2020-12-23 00:17:03,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:17:03,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:17:03,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:17:03,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:17:03,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:17:03,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:17:03" (1/1) ... [2020-12-23 00:17:03,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304d3aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:03, skipping insertion in model container [2020-12-23 00:17:03,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:17:03" (1/1) ... [2020-12-23 00:17:03,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:17:03,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:17:04,059 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-industry-pattern/array_of_struct_ptr_mul_init.i[821,834] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]],p] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]],q] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]],p] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]],q] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:17:04,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:17:06,054 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:17:06,072 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-industry-pattern/array_of_struct_ptr_mul_init.i[821,834] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[2],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[2],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:17:06,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:17:06,106 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:17:06,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06 WrapperNode [2020-12-23 00:17:06,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:17:06,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:17:06,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:17:06,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:17:06,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:17:06,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:17:06,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:17:06,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:17:06,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:17:06,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:17:06,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:17:06,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:17:06,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (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 00:17:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:17:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:17:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:17:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:17:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:17:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:17:06,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:17:06,769 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 00:17:06,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:17:06 BoogieIcfgContainer [2020-12-23 00:17:06,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:17:06,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:17:06,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:17:06,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:17:06,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:17:03" (1/3) ... [2020-12-23 00:17:06,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423ad4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:17:06, skipping insertion in model container [2020-12-23 00:17:06,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06" (2/3) ... [2020-12-23 00:17:06,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423ad4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:17:06, skipping insertion in model container [2020-12-23 00:17:06,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:17:06" (3/3) ... [2020-12-23 00:17:06,781 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_mul_init.i [2020-12-23 00:17:06,788 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:17:06,794 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:17:06,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:17:06,845 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:17:06,845 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:17:06,846 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:17:06,846 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:17:06,846 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:17:06,846 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:17:06,846 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:17:06,847 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:17:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 00:17:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:17:06,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:06,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:06,869 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:06,875 INFO L82 PathProgramCache]: Analyzing trace with hash 542545282, now seen corresponding path program 1 times [2020-12-23 00:17:06,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:06,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871539776] [2020-12-23 00:17:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:07,045 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 00:17:07,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871539776] [2020-12-23 00:17:07,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:17:07,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:17:07,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518196626] [2020-12-23 00:17:07,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:17:07,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:07,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:17:07,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:17:07,074 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 00:17:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:07,092 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-12-23 00:17:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:17:07,094 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 00:17:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:07,104 INFO L225 Difference]: With dead ends: 38 [2020-12-23 00:17:07,104 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 00:17:07,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:17:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 00:17:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 00:17:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:17:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-23 00:17:07,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-12-23 00:17:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:07,145 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-23 00:17:07,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:17:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-23 00:17:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:17:07,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:07,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:07,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:17:07,147 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:07,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:07,148 INFO L82 PathProgramCache]: Analyzing trace with hash -630060617, now seen corresponding path program 1 times [2020-12-23 00:17:07,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:07,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779842149] [2020-12-23 00:17:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:07,203 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 00:17:07,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779842149] [2020-12-23 00:17:07,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:17:07,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:17:07,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753064767] [2020-12-23 00:17:07,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:17:07,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:07,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:17:07,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:17:07,207 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2020-12-23 00:17:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:07,281 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-12-23 00:17:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:17:07,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-23 00:17:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:07,283 INFO L225 Difference]: With dead ends: 43 [2020-12-23 00:17:07,284 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:17:07,285 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 00:17:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:17:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2020-12-23 00:17:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:17:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-23 00:17:07,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-23 00:17:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:07,291 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-23 00:17:07,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:17:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-23 00:17:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:17:07,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:07,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:07,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:17:07,293 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:07,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2036151027, now seen corresponding path program 1 times [2020-12-23 00:17:07,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:07,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180943255] [2020-12-23 00:17:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:17:07,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180943255] [2020-12-23 00:17:07,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590580515] [2020-12-23 00:17:07,345 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 00:17:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:07,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:17:07,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:17:07,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:07,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:17:07,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866327158] [2020-12-23 00:17:07,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:17:07,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:07,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:17:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:07,591 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-23 00:17:07,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:07,694 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-12-23 00:17:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:17:07,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 00:17:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:07,697 INFO L225 Difference]: With dead ends: 57 [2020-12-23 00:17:07,697 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 00:17:07,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 00:17:07,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 00:17:07,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2020-12-23 00:17:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:17:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-23 00:17:07,705 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-12-23 00:17:07,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:07,706 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-23 00:17:07,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:17:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-23 00:17:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:17:07,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:07,707 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:07,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:17:07,922 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:07,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:07,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1468366451, now seen corresponding path program 2 times [2020-12-23 00:17:07,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:07,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433980299] [2020-12-23 00:17:07,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:07,943 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:17:07,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140835841] [2020-12-23 00:17:07,944 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 00:17:08,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:08,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:08,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:17:08,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:17:08,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433980299] [2020-12-23 00:17:08,124 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:17:08,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140835841] [2020-12-23 00:17:08,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:17:08,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:17:08,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514153677] [2020-12-23 00:17:08,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:17:08,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:17:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:08,128 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2020-12-23 00:17:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:08,282 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2020-12-23 00:17:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:17:08,283 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-23 00:17:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:08,286 INFO L225 Difference]: With dead ends: 73 [2020-12-23 00:17:08,287 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 00:17:08,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 00:17:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 00:17:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 29. [2020-12-23 00:17:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:17:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-23 00:17:08,304 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-12-23 00:17:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:08,304 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-23 00:17:08,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:17:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-23 00:17:08,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:17:08,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:08,306 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:08,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:08,520 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:08,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:08,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1638808119, now seen corresponding path program 3 times [2020-12-23 00:17:08,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:08,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521342883] [2020-12-23 00:17:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:08,560 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:17:08,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318439613] [2020-12-23 00:17:08,561 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 00:17:08,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:17:08,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:17:08,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:17:08,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521342883] [2020-12-23 00:17:08,790 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:17:08,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318439613] [2020-12-23 00:17:08,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:17:08,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:17:08,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151572298] [2020-12-23 00:17:08,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:17:08,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:08,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:17:08,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:08,793 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-12-23 00:17:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:08,947 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-12-23 00:17:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:17:08,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-23 00:17:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:08,949 INFO L225 Difference]: With dead ends: 89 [2020-12-23 00:17:08,949 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 00:17:08,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 00:17:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2020-12-23 00:17:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:17:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-12-23 00:17:08,957 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2020-12-23 00:17:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:08,958 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-12-23 00:17:08,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:17:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-12-23 00:17:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 00:17:08,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:08,959 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:09,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:09,173 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:09,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1366955217, now seen corresponding path program 4 times [2020-12-23 00:17:09,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:09,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923214130] [2020-12-23 00:17:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:09,200 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:17:09,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200726706] [2020-12-23 00:17:09,201 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 00:17:09,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:09,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:09,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:17:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:17:09,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923214130] [2020-12-23 00:17:09,422 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:17:09,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200726706] [2020-12-23 00:17:09,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:17:09,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:17:09,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535847231] [2020-12-23 00:17:09,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:17:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:17:09,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:17:09,425 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2020-12-23 00:17:09,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:09,671 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2020-12-23 00:17:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:17:09,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-23 00:17:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:09,673 INFO L225 Difference]: With dead ends: 105 [2020-12-23 00:17:09,673 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 00:17:09,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:17:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 00:17:09,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 39. [2020-12-23 00:17:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 00:17:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-23 00:17:09,681 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 31 [2020-12-23 00:17:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:09,682 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-23 00:17:09,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:17:09,682 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-23 00:17:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 00:17:09,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:09,683 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:09,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:09,899 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:09,900 INFO L82 PathProgramCache]: Analyzing trace with hash 684091771, now seen corresponding path program 5 times [2020-12-23 00:17:09,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:09,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665742369] [2020-12-23 00:17:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:09,929 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:17:09,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941702056] [2020-12-23 00:17:09,930 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 00:17:11,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:17:11,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:11,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:17:11,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:17:11,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665742369] [2020-12-23 00:17:11,923 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:17:11,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941702056] [2020-12-23 00:17:11,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:17:11,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:17:11,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667945798] [2020-12-23 00:17:11,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:17:11,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:11,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:17:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:11,926 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2020-12-23 00:17:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:12,083 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2020-12-23 00:17:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:17:12,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-23 00:17:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:12,086 INFO L225 Difference]: With dead ends: 121 [2020-12-23 00:17:12,086 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 00:17:12,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 00:17:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 44. [2020-12-23 00:17:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 00:17:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-23 00:17:12,094 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 36 [2020-12-23 00:17:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:12,094 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-23 00:17:12,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:17:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-23 00:17:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:17:12,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:12,096 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:12,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:17:12,311 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:12,312 INFO L82 PathProgramCache]: Analyzing trace with hash -41218069, now seen corresponding path program 6 times [2020-12-23 00:17:12,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:12,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783492158] [2020-12-23 00:17:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:12,331 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:17:12,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414664905] [2020-12-23 00:17:12,332 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 00:17:12,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:17:12,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:13,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:17:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:17:13,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783492158] [2020-12-23 00:17:13,115 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:17:13,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414664905] [2020-12-23 00:17:13,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:17:13,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:17:13,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379545487] [2020-12-23 00:17:13,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:17:13,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:13,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:17:13,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:13,118 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 9 states. [2020-12-23 00:17:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:13,292 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2020-12-23 00:17:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:17:13,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-12-23 00:17:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:13,294 INFO L225 Difference]: With dead ends: 137 [2020-12-23 00:17:13,295 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:17:13,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:13,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:17:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 49. [2020-12-23 00:17:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:17:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-23 00:17:13,302 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 41 [2020-12-23 00:17:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:13,303 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-23 00:17:13,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:17:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-23 00:17:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:17:13,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:13,305 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:13,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:13,520 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:13,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1441922881, now seen corresponding path program 7 times [2020-12-23 00:17:13,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:13,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427576069] [2020-12-23 00:17:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:13,561 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:17:13,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585655200] [2020-12-23 00:17:13,562 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 00:17:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:13,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:17:13,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:17:13,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427576069] [2020-12-23 00:17:13,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:17:13,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585655200] [2020-12-23 00:17:13,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:17:13,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:17:13,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773888405] [2020-12-23 00:17:13,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:17:13,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:13,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:17:13,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:13,806 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 10 states. [2020-12-23 00:17:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:13,981 INFO L93 Difference]: Finished difference Result 153 states and 184 transitions. [2020-12-23 00:17:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:17:13,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-12-23 00:17:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:13,984 INFO L225 Difference]: With dead ends: 153 [2020-12-23 00:17:13,984 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 00:17:13,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 00:17:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 54. [2020-12-23 00:17:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:17:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-12-23 00:17:14,015 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 46 [2020-12-23 00:17:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:14,015 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-12-23 00:17:14,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:17:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-12-23 00:17:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:17:14,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:14,018 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:14,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:14,238 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:14,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1095979865, now seen corresponding path program 8 times [2020-12-23 00:17:14,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:14,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108588612] [2020-12-23 00:17:14,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:14,259 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:17:14,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014711486] [2020-12-23 00:17:14,259 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 00:17:14,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:14,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:17:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:17:14,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108588612] [2020-12-23 00:17:14,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:17:14,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014711486] [2020-12-23 00:17:14,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:17:14,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:17:14,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750313605] [2020-12-23 00:17:14,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:17:14,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:14,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:17:14,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:14,524 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 11 states. [2020-12-23 00:17:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:14,701 INFO L93 Difference]: Finished difference Result 169 states and 203 transitions. [2020-12-23 00:17:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:17:14,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-12-23 00:17:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:14,704 INFO L225 Difference]: With dead ends: 169 [2020-12-23 00:17:14,704 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 00:17:14,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 00:17:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 59. [2020-12-23 00:17:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:17:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-12-23 00:17:14,711 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 51 [2020-12-23 00:17:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:14,712 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-12-23 00:17:14,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:17:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-12-23 00:17:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:17:14,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:14,713 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:14,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:17:14,927 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash -957530109, now seen corresponding path program 9 times [2020-12-23 00:17:14,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:14,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812026290] [2020-12-23 00:17:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:14,947 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:17:14,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330983208] [2020-12-23 00:17:14,948 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