/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_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:06:31,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:06:31,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:06:31,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 10:06:31,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:06:32,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:06:32,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:06:32,003 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 10:06:32,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:06:32,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:06:32,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:06:32,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:06:32,044 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:06:32,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:06:32,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:06:32,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:06:32,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:06:32,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:06:32,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:06:32,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:06:32,049 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:06:32,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:06:32,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:06:32,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:06:32,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:06:32,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:06:32,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:06:32,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:06:32,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:06:32,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:06:32,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:06:32,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:06:32,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:06:32,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:06:32,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:06:32,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:06:32,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:06:32,552 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:06:32,553 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:06:32,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i [2021-01-06 10:06:32,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4f90111c9/eefc0e74abc045989692c8dc06a69c31/FLAGbf83cdea8 [2021-01-06 10:06:33,262 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:06:33,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i [2021-01-06 10:06:33,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4f90111c9/eefc0e74abc045989692c8dc06a69c31/FLAGbf83cdea8 [2021-01-06 10:06:33,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4f90111c9/eefc0e74abc045989692c8dc06a69c31 [2021-01-06 10:06:33,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:06:33,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:06:33,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:06:33,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:06:33,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:06:33,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:06:33" (1/1) ... [2021-01-06 10:06:33,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a40ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:33, skipping insertion in model container [2021-01-06 10:06:33,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:06:33" (1/1) ... [2021-01-06 10:06:33,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:06:33,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:06:33,943 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_single_elem_init.i[865,878] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~s~0,],n] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~s~0,],p] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~s~0,],p] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IntegerLiteral[3]]],p] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IntegerLiteral[3]]],n] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:06:33,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:06:36,381 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:06:36,400 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_single_elem_init.i[865,878] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#s~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#s~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#s~0,],base],StructAccessExpression[IdentifierExpression[~#s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#s~0,],base],StructAccessExpression[IdentifierExpression[~#s~0,],offset]]] 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[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[24],StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[28],StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:06:36,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:06:36,455 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:06:36,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36 WrapperNode [2021-01-06 10:06:36,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:06:36,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:06:36,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:06:36,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:06:36,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:06:36,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:06:36,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:06:36,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:06:36,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:06:36,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:06:36,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:06:36,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:06:36,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:06:36,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:06:36,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:06:36,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:06:36,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:06:36,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:06:36,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:06:36,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:06:37,165 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:06:37,166 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:06:37,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:06:37 BoogieIcfgContainer [2021-01-06 10:06:37,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:06:37,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:06:37,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:06:37,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:06:37,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:06:33" (1/3) ... [2021-01-06 10:06:37,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf7a68c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:06:37, skipping insertion in model container [2021-01-06 10:06:37,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36" (2/3) ... [2021-01-06 10:06:37,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf7a68c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:06:37, skipping insertion in model container [2021-01-06 10:06:37,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:06:37" (3/3) ... [2021-01-06 10:06:37,178 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_single_elem_init.i [2021-01-06 10:06:37,185 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:06:37,190 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:06:37,211 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:06:37,239 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:06:37,239 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:06:37,239 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:06:37,239 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:06:37,239 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:06:37,239 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:06:37,240 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:06:37,240 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:06:37,255 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-01-06 10:06:37,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:06:37,261 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:37,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:37,262 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:37,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1140000322, now seen corresponding path program 1 times [2021-01-06 10:06:37,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:37,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936257659] [2021-01-06 10:06:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:37,447 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 10:06:37,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936257659] [2021-01-06 10:06:37,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:06:37,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:06:37,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825475102] [2021-01-06 10:06:37,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:06:37,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:06:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:06:37,482 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2021-01-06 10:06:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:37,500 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-01-06 10:06:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:06:37,502 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 10:06:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:37,512 INFO L225 Difference]: With dead ends: 32 [2021-01-06 10:06:37,512 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 10:06:37,516 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 [2021-01-06 10:06:37,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 10:06:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 10:06:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 10:06:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-01-06 10:06:37,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2021-01-06 10:06:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:37,555 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-01-06 10:06:37,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:06:37,555 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-01-06 10:06:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:06:37,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:37,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:37,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:06:37,559 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:37,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1807612939, now seen corresponding path program 1 times [2021-01-06 10:06:37,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:37,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640808169] [2021-01-06 10:06:37,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:37,692 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 10:06:37,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640808169] [2021-01-06 10:06:37,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:06:37,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:06:37,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762954970] [2021-01-06 10:06:37,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:06:37,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:37,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:06:37,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:06:37,698 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 3 states. [2021-01-06 10:06:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:37,768 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-01-06 10:06:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:06:37,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 10:06:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:37,770 INFO L225 Difference]: With dead ends: 36 [2021-01-06 10:06:37,770 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:06:37,771 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 10:06:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:06:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2021-01-06 10:06:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 10:06:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 10:06:37,776 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2021-01-06 10:06:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:37,776 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 10:06:37,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:06:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 10:06:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:06:37,777 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:37,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:37,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:06:37,778 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2006795472, now seen corresponding path program 1 times [2021-01-06 10:06:37,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:37,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500884289] [2021-01-06 10:06:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:37,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500884289] [2021-01-06 10:06:37,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005975681] [2021-01-06 10:06:37,853 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 10:06:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:37,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:06:37,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:38,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:38,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:06:38,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323743844] [2021-01-06 10:06:38,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:06:38,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:38,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:06:38,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:06:38,035 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 5 states. [2021-01-06 10:06:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:38,104 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-01-06 10:06:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:06:38,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 10:06:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:38,108 INFO L225 Difference]: With dead ends: 48 [2021-01-06 10:06:38,108 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 10:06:38,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 10:06:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 10:06:38,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2021-01-06 10:06:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:06:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-01-06 10:06:38,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 13 [2021-01-06 10:06:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:38,122 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-01-06 10:06:38,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:06:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-01-06 10:06:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:06:38,123 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:38,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:38,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:06:38,339 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:38,340 INFO L82 PathProgramCache]: Analyzing trace with hash -2104533781, now seen corresponding path program 2 times [2021-01-06 10:06:38,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:38,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301029628] [2021-01-06 10:06:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:38,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301029628] [2021-01-06 10:06:38,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807955694] [2021-01-06 10:06:38,435 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 10:06:38,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:38,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:38,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:06:38,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:38,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:38,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:06:38,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705789703] [2021-01-06 10:06:38,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:06:38,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:38,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:06:38,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:06:38,628 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 6 states. [2021-01-06 10:06:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:38,709 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2021-01-06 10:06:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:06:38,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 10:06:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:38,712 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:06:38,712 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:06:38,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 10:06:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:06:38,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 24. [2021-01-06 10:06:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:06:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-01-06 10:06:38,717 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2021-01-06 10:06:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:38,718 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-01-06 10:06:38,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:06:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-01-06 10:06:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:06:38,719 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:38,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:38,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:38,933 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:38,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1842260262, now seen corresponding path program 3 times [2021-01-06 10:06:38,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:38,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582910722] [2021-01-06 10:06:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:39,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582910722] [2021-01-06 10:06:39,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665123962] [2021-01-06 10:06:39,144 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 10:06:39,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:06:39,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:39,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:06:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:39,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:39,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:06:39,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358768957] [2021-01-06 10:06:39,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:06:39,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:06:39,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:06:39,405 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 7 states. [2021-01-06 10:06:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:39,510 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2021-01-06 10:06:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:06:39,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-01-06 10:06:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:39,513 INFO L225 Difference]: With dead ends: 72 [2021-01-06 10:06:39,513 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 10:06:39,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 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 10:06:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 10:06:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 28. [2021-01-06 10:06:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:06:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-01-06 10:06:39,520 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 21 [2021-01-06 10:06:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:39,521 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-01-06 10:06:39,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:06:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-01-06 10:06:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:06:39,522 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:39,522 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:39,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:39,736 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash -741908511, now seen corresponding path program 4 times [2021-01-06 10:06:39,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:39,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025618791] [2021-01-06 10:06:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:39,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025618791] [2021-01-06 10:06:39,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322690313] [2021-01-06 10:06:39,898 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 10:06:40,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:06:40,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:06:40,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:40,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:40,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 10:06:40,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180039011] [2021-01-06 10:06:40,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:06:40,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:40,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:06:40,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:06:40,190 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2021-01-06 10:06:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:40,308 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2021-01-06 10:06:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:06:40,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-01-06 10:06:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:40,310 INFO L225 Difference]: With dead ends: 84 [2021-01-06 10:06:40,310 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:06:40,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 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 10:06:40,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:06:40,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 32. [2021-01-06 10:06:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:06:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-01-06 10:06:40,317 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 25 [2021-01-06 10:06:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:40,318 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-01-06 10:06:40,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:06:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-01-06 10:06:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:06:40,319 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:40,319 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:40,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:40,533 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:40,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:40,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1933557476, now seen corresponding path program 5 times [2021-01-06 10:06:40,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:40,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138717096] [2021-01-06 10:06:40,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:40,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138717096] [2021-01-06 10:06:40,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943816433] [2021-01-06 10:06:40,714 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 10:06:41,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:06:41,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:41,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:06:41,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:41,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:41,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:06:41,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752721552] [2021-01-06 10:06:41,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:06:41,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:41,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:06:41,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:06:41,724 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 9 states. [2021-01-06 10:06:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:41,830 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2021-01-06 10:06:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:06:41,831 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 10:06:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:41,834 INFO L225 Difference]: With dead ends: 96 [2021-01-06 10:06:41,834 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 10:06:41,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 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 10:06:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 10:06:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 36. [2021-01-06 10:06:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:06:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-01-06 10:06:41,850 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 29 [2021-01-06 10:06:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:41,851 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-01-06 10:06:41,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:06:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-01-06 10:06:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:06:41,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:41,852 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:42,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:06:42,068 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1872760023, now seen corresponding path program 6 times [2021-01-06 10:06:42,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:42,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981976076] [2021-01-06 10:06:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:42,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981976076] [2021-01-06 10:06:42,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401114257] [2021-01-06 10:06:42,257 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 10:06:43,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:06:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:43,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:06:43,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:43,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:43,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:06:43,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188618749] [2021-01-06 10:06:43,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:06:43,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:06:43,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:06:43,103 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 10 states. [2021-01-06 10:06:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:43,203 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2021-01-06 10:06:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:06:43,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2021-01-06 10:06:43,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:43,205 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:06:43,205 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 10:06:43,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 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 10:06:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 10:06:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 40. [2021-01-06 10:06:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 10:06:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-01-06 10:06:43,212 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 33 [2021-01-06 10:06:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:43,213 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-01-06 10:06:43,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:06:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-01-06 10:06:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:06:43,214 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:43,214 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:43,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:43,428 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash 32342802, now seen corresponding path program 7 times [2021-01-06 10:06:43,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:43,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206217688] [2021-01-06 10:06:43,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:43,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206217688] [2021-01-06 10:06:43,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669819490] [2021-01-06 10:06:43,622 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 10:06:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:43,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:06:43,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:43,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:43,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:06:43,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846333489] [2021-01-06 10:06:43,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:06:43,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:06:43,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:06:43,857 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 11 states. [2021-01-06 10:06:43,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:43,973 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2021-01-06 10:06:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:06:43,974 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2021-01-06 10:06:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:43,975 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:06:43,975 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 10:06:43,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 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 10:06:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 10:06:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 44. [2021-01-06 10:06:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:06:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-01-06 10:06:43,982 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 37 [2021-01-06 10:06:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:43,983 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-01-06 10:06:43,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:06:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-01-06 10:06:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:06:43,984 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:43,984 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:44,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:44,198 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash 667902925, now seen corresponding path program 8 times [2021-01-06 10:06:44,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:44,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647385041] [2021-01-06 10:06:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:44,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647385041] [2021-01-06 10:06:44,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456343633] [2021-01-06 10:06:44,353 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 10:06:44,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:44,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:06:44,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:44,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:44,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:06:44,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370820349] [2021-01-06 10:06:44,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:06:44,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:44,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:06:44,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:06:44,539 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 12 states. [2021-01-06 10:06:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:44,686 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2021-01-06 10:06:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:06:44,687 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2021-01-06 10:06:44,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:44,689 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:06:44,690 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 10:06:44,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 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 10:06:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 10:06:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 48. [2021-01-06 10:06:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:06:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-01-06 10:06:44,713 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 41 [2021-01-06 10:06:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:44,713 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-01-06 10:06:44,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:06:44,713 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-01-06 10:06:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:06:44,714 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:44,715 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:44,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:06:44,935 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash -737382648, now seen corresponding path program 9 times [2021-01-06 10:06:44,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:44,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998792610] [2021-01-06 10:06:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:45,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998792610] [2021-01-06 10:06:45,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810451423] [2021-01-06 10:06:45,081 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 10:06:52,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:06:52,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:06:52,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:52,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:52,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:06:52,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530311511] [2021-01-06 10:06:52,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:06:52,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:52,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:06:52,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:06:52,527 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 13 states. [2021-01-06 10:06:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:52,652 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2021-01-06 10:06:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:06:52,653 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2021-01-06 10:06:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:52,654 INFO L225 Difference]: With dead ends: 144 [2021-01-06 10:06:52,654 INFO L226 Difference]: Without dead ends: 135 [2021-01-06 10:06:52,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 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 10:06:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-01-06 10:06:52,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 52. [2021-01-06 10:06:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:06:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2021-01-06 10:06:52,660 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 45 [2021-01-06 10:06:52,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:52,661 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2021-01-06 10:06:52,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:06:52,661 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2021-01-06 10:06:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:06:52,662 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:52,662 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:52,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:52,863 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:52,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1207212861, now seen corresponding path program 10 times [2021-01-06 10:06:52,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:52,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356288757] [2021-01-06 10:06:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:53,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356288757] [2021-01-06 10:06:53,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165565677] [2021-01-06 10:06:53,025 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 10:06:55,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:06:55,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:55,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:06:55,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:55,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:55,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:06:55,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960844626] [2021-01-06 10:06:55,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:06:55,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:55,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:06:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:06:55,531 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 14 states. [2021-01-06 10:06:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:55,689 INFO L93 Difference]: Finished difference Result 156 states and 196 transitions. [2021-01-06 10:06:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:06:55,690 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-01-06 10:06:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:55,693 INFO L225 Difference]: With dead ends: 156 [2021-01-06 10:06:55,693 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 10:06:55,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 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 10:06:55,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 10:06:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 56. [2021-01-06 10:06:55,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:06:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-01-06 10:06:55,700 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 49 [2021-01-06 10:06:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:55,706 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-01-06 10:06:55,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:06:55,706 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-01-06 10:06:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 10:06:55,707 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:55,708 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:55,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:55,909 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash -204274434, now seen corresponding path program 11 times [2021-01-06 10:06:55,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:55,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169134360] [2021-01-06 10:06:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:56,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169134360] [2021-01-06 10:06:56,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264233412] [2021-01-06 10:06:56,143 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