/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_ptr_partial_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:06:34,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:06:34,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:06:34,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:06:34,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:06:34,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:06:34,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:06:34,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:06:34,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:06:34,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:06:34,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:06:34,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:06:34,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:06:34,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:06:34,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:06:34,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:06:34,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:06:34,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:06:34,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:06:34,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:06:34,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:06:34,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:06:34,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:06:34,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:06:34,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:06:34,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:06:34,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:06:34,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:06:34,504 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 10:06:34,553 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:06:34,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:06:34,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:06:34,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:06:34,559 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:06:34,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:06:34,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:06:34,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:06:34,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:06:34,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:06:34,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:06:34,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:06:34,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:06:34,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:06:34,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:06:34,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:06:34,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:06:34,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:06:34,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:06:34,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:06:34,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:06:34,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:06:34,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:06:34,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:06:34,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:06:34,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:06:34,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:06:35,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:06:35,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:06:35,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:06:35,040 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:06:35,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_ptr_partial_init.i [2021-01-06 10:06:35,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e799aad1/3f8aa43592094248a7c1ae29266d6523/FLAG58952cc68 [2021-01-06 10:06:35,843 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:06:35,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_ptr_partial_init.i [2021-01-06 10:06:35,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e799aad1/3f8aa43592094248a7c1ae29266d6523/FLAG58952cc68 [2021-01-06 10:06:36,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e799aad1/3f8aa43592094248a7c1ae29266d6523 [2021-01-06 10:06:36,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:06:36,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:06:36,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:06:36,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:06:36,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:06:36,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b467b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36, skipping insertion in model container [2021-01-06 10:06:36,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:06:36" (1/1) ... [2021-01-06 10:06:36,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:06:36,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:06:36,478 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_ptr_partial_init.i[952,965] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,GLOBAL]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,GLOBAL]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] [2021-01-06 10:06:36,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:06:36,522 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:06:36,539 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_ptr_partial_init.i[952,965] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] 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,GLOBAL]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] 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,GLOBAL]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] [2021-01-06 10:06:36,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:06:36,576 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:06:36,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:36 WrapperNode [2021-01-06 10:06:36,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:06:36,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:06:36,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:06:36,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:06:36,590 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 10:06:36,603 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 10:06:36,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:06:36,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:06:36,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:06:36,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:06:36,643 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 10:06:36,643 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 10:06:36,657 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 10:06:36,657 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 10:06:36,669 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 10:06:36,680 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 10:06:36,682 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 10:06:36,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:06:36,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:06:36,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:06:36,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:06:36,696 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 10:06:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-01-06 10:06:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:06:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-01-06 10:06:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:06:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 10:06:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:06:36,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:06:37,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:06:37,286 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 10:06:37,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:06:37 BoogieIcfgContainer [2021-01-06 10:06:37,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:06:37,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:06:37,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:06:37,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:06:37,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:06:36" (1/3) ... [2021-01-06 10:06:37,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edd151c 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 10:06:37,296 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 10:06:37,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edd151c 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 10:06:37,296 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 10:06:37,298 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_partial_init.i [2021-01-06 10:06:37,305 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:06:37,309 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:06:37,329 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:06:37,358 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:06:37,358 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:06:37,358 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:06:37,358 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:06:37,359 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:06:37,359 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:06:37,359 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:06:37,359 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:06:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 10:06:37,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:06:37,381 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:37,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:37,382 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:37,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-01-06 10:06:37,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:37,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148668883] [2021-01-06 10:06:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:37,580 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 10:06:37,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148668883] [2021-01-06 10:06:37,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:06:37,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:06:37,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039300207] [2021-01-06 10:06:37,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:06:37,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:37,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:06:37,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:06:37,609 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-01-06 10:06:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:37,676 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2021-01-06 10:06:37,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:06:37,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 10:06:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:37,688 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:06:37,689 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 10:06:37,692 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 10:06:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 10:06:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2021-01-06 10:06:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 10:06:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 10:06:37,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-01-06 10:06:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:37,734 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 10:06:37,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:06:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 10:06:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:06:37,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:37,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:37,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:06:37,735 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:37,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-01-06 10:06:37,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:37,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989062091] [2021-01-06 10:06:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:06:37,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989062091] [2021-01-06 10:06:37,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504728034] [2021-01-06 10:06:37,820 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 10:06:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:37,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:06:37,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:06:37,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:37,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:06:37,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674660953] [2021-01-06 10:06:37,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:06:37,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:37,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:06:37,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:06:37,996 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2021-01-06 10:06:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:38,056 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-01-06 10:06:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:06:38,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 10:06:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:38,058 INFO L225 Difference]: With dead ends: 45 [2021-01-06 10:06:38,059 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 10:06:38,060 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 10:06:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 10:06:38,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2021-01-06 10:06:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:06:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 10:06:38,066 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2021-01-06 10:06:38,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:38,066 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 10:06:38,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:06:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 10:06:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:06:38,067 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:38,068 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:38,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:06:38,285 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:38,287 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 2 times [2021-01-06 10:06:38,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:38,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456840663] [2021-01-06 10:06:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:06:38,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456840663] [2021-01-06 10:06:38,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410501272] [2021-01-06 10:06:38,442 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 10:06:38,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:38,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:06:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:06:38,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:38,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:06:38,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168470427] [2021-01-06 10:06:38,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:06:38,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:06:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:06:38,619 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2021-01-06 10:06:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:38,743 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-01-06 10:06:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:06:38,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 10:06:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:38,748 INFO L225 Difference]: With dead ends: 57 [2021-01-06 10:06:38,748 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 10:06:38,751 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 10:06:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 10:06:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 24. [2021-01-06 10:06:38,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:06:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 10:06:38,764 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2021-01-06 10:06:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:38,767 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 10:06:38,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:06:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 10:06:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:06:38,772 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:38,772 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:38,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:38,974 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:38,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1303246583, now seen corresponding path program 3 times [2021-01-06 10:06:38,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:38,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552352107] [2021-01-06 10:06:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:06:39,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552352107] [2021-01-06 10:06:39,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544799505] [2021-01-06 10:06:39,053 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 10:06:39,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:06:39,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:39,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:06:39,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:06:39,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:39,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:06:39,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884591681] [2021-01-06 10:06:39,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:06:39,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:06:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:06:39,219 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2021-01-06 10:06:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:39,323 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-01-06 10:06:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:06:39,323 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-01-06 10:06:39,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:39,328 INFO L225 Difference]: With dead ends: 69 [2021-01-06 10:06:39,328 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 10:06:39,330 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 10:06:39,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 10:06:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2021-01-06 10:06:39,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:06:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 10:06:39,346 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2021-01-06 10:06:39,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:39,347 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 10:06:39,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:06:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 10:06:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:06:39,348 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:39,350 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:39,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:39,565 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:39,567 INFO L82 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 4 times [2021-01-06 10:06:39,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:39,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057412648] [2021-01-06 10:06:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:06:39,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057412648] [2021-01-06 10:06:39,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577265508] [2021-01-06 10:06:39,730 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 10:06:39,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:06:39,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:06:39,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:06:39,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:39,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 10:06:39,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649725178] [2021-01-06 10:06:39,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:06:39,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:39,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:06:39,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:06:39,851 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2021-01-06 10:06:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:39,951 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-01-06 10:06:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:06:39,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-01-06 10:06:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:39,952 INFO L225 Difference]: With dead ends: 81 [2021-01-06 10:06:39,952 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 10:06:39,953 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 10:06:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 10:06:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2021-01-06 10:06:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:06:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-01-06 10:06:39,959 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2021-01-06 10:06:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:39,959 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-01-06 10:06:39,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:06:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-01-06 10:06:39,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:06:39,960 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:39,960 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:40,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:40,175 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2015456385, now seen corresponding path program 5 times [2021-01-06 10:06:40,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:40,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265713550] [2021-01-06 10:06:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 10:06:40,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265713550] [2021-01-06 10:06:40,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787377328] [2021-01-06 10:06:40,265 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 10:06:41,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:06:41,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:41,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:06:41,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 10:06:41,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:41,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:06:41,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922581059] [2021-01-06 10:06:41,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:06:41,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:41,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:06:41,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:06:41,145 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2021-01-06 10:06:41,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:41,257 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-01-06 10:06:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:06:41,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 10:06:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:41,259 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:06:41,259 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:06:41,260 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 10:06:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:06:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 36. [2021-01-06 10:06:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:06:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 10:06:41,266 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2021-01-06 10:06:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:41,266 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 10:06:41,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:06:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 10:06:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:06:41,267 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:41,268 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:41,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:06:41,482 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash -189699779, now seen corresponding path program 6 times [2021-01-06 10:06:41,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:41,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454645757] [2021-01-06 10:06:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:06:41,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454645757] [2021-01-06 10:06:41,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239283390] [2021-01-06 10:06:41,657 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 10:06:42,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:06:42,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:06:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:06:42,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:42,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:06:42,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610442773] [2021-01-06 10:06:42,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:06:42,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:42,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:06:42,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:06:42,404 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2021-01-06 10:06:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:42,525 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-01-06 10:06:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:06:42,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2021-01-06 10:06:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:42,527 INFO L225 Difference]: With dead ends: 105 [2021-01-06 10:06:42,527 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 10:06:42,528 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 10:06:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 10:06:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 40. [2021-01-06 10:06:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 10:06:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-01-06 10:06:42,534 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2021-01-06 10:06:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:42,534 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-01-06 10:06:42,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:06:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-01-06 10:06:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:06:42,535 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:42,536 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:42,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:42,749 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:42,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:42,750 INFO L82 PathProgramCache]: Analyzing trace with hash 760584185, now seen corresponding path program 7 times [2021-01-06 10:06:42,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:42,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489028889] [2021-01-06 10:06:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 10:06:42,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489028889] [2021-01-06 10:06:42,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092966383] [2021-01-06 10:06:42,880 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 10:06:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:42,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:06:42,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 10:06:43,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:43,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:06:43,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658075918] [2021-01-06 10:06:43,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:06:43,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:43,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:06:43,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:06:43,086 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2021-01-06 10:06:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:43,251 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2021-01-06 10:06:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:06:43,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2021-01-06 10:06:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:43,259 INFO L225 Difference]: With dead ends: 117 [2021-01-06 10:06:43,260 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 10:06:43,261 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 10:06:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 10:06:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 44. [2021-01-06 10:06:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:06:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-01-06 10:06:43,277 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-01-06 10:06:43,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:43,277 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-01-06 10:06:43,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:06:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-01-06 10:06:43,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:06:43,278 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:43,278 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:43,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:43,488 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1775699787, now seen corresponding path program 8 times [2021-01-06 10:06:43,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:43,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307953046] [2021-01-06 10:06:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:06:43,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307953046] [2021-01-06 10:06:43,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261362181] [2021-01-06 10:06:43,650 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 10:06:43,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:43,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:43,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:06:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:06:43,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:43,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:06:43,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421764548] [2021-01-06 10:06:43,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:06:43,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:43,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:06:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:06:43,808 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2021-01-06 10:06:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:43,960 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-01-06 10:06:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:06:43,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2021-01-06 10:06:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:43,961 INFO L225 Difference]: With dead ends: 129 [2021-01-06 10:06:43,961 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:06:43,962 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 10:06:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:06:43,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 48. [2021-01-06 10:06:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:06:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-01-06 10:06:43,968 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2021-01-06 10:06:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:43,969 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-01-06 10:06:43,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:06:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-01-06 10:06:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:06:43,970 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:43,970 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:44,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:06:44,185 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:44,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:44,186 INFO L82 PathProgramCache]: Analyzing trace with hash -859403407, now seen corresponding path program 9 times [2021-01-06 10:06:44,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:44,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196137286] [2021-01-06 10:06:44,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 10:06:44,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196137286] [2021-01-06 10:06:44,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407777484] [2021-01-06 10:06:44,373 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 10:07:41,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:07:41,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:07:41,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:07:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:07:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 10:07:41,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:07:41,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:07:41,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281408869] [2021-01-06 10:07:41,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:07:41,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:07:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:07:41,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:07:41,209 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2021-01-06 10:07:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:07:41,374 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2021-01-06 10:07:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:07:41,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2021-01-06 10:07:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:07:41,376 INFO L225 Difference]: With dead ends: 141 [2021-01-06 10:07:41,376 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 10:07:41,377 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 10:07:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 10:07:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2021-01-06 10:07:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:07:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-01-06 10:07:41,383 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2021-01-06 10:07:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:07:41,383 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-01-06 10:07:41,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:07:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-01-06 10:07:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:07:41,384 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:07:41,385 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:07:41,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:07:41,600 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:07:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:07:41,601 INFO L82 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 10 times [2021-01-06 10:07:41,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:07:41,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622490960] [2021-01-06 10:07:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:07:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:07:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:07:41,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622490960] [2021-01-06 10:07:41,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455967160] [2021-01-06 10:07:41,752 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 10:07:41,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:07:41,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:07:41,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:07:41,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:07:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:07:41,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:07:41,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:07:41,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039756049] [2021-01-06 10:07:41,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:07:41,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:07:41,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:07:41,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:07:41,945 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 14 states. [2021-01-06 10:07:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:07:42,129 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-01-06 10:07:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:07:42,132 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-01-06 10:07:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:07:42,133 INFO L225 Difference]: With dead ends: 153 [2021-01-06 10:07:42,133 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 10:07:42,134 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 10:07:42,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 10:07:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 56. [2021-01-06 10:07:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:07:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-01-06 10:07:42,140 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2021-01-06 10:07:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:07:42,141 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-01-06 10:07:42,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:07:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-01-06 10:07:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 10:07:42,142 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:07:42,142 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:07:42,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:07:42,355 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:07:42,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:07:42,356 INFO L82 PathProgramCache]: Analyzing trace with hash -380877079, now seen corresponding path program 11 times [2021-01-06 10:07:42,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:07:42,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891587265] [2021-01-06 10:07:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:07:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:07:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 10:07:42,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891587265] [2021-01-06 10:07:42,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172297354] [2021-01-06 10:07:42,557 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