/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:07:26,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:07:26,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:07:26,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 00:07:26,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:07:26,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:07:26,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:07:26,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:07:26,806 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:07:26,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:07:26,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:07:26,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:07:26,811 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:07:26,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:07:26,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:07:26,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:07:26,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:07:26,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:07:26,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:07:26,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:07:26,814 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:07:26,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:07:26,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:07:26,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:07:26,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:07:26,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:07:26,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:07:26,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:07:26,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:07:26,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:07:26,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:07:26,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:07:26,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:07:26,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:07:27,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:07:27,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:07:27,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:07:27,353 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:07:27,354 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:07:27,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2020-12-23 00:07:27,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7cda931f2/2e809a3af5bd435c9002ebe14f7002b2/FLAGd483acf37 [2020-12-23 00:07:28,022 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:07:28,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2020-12-23 00:07:28,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7cda931f2/2e809a3af5bd435c9002ebe14f7002b2/FLAGd483acf37 [2020-12-23 00:07:28,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7cda931f2/2e809a3af5bd435c9002ebe14f7002b2 [2020-12-23 00:07:28,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:07:28,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:07:28,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:07:28,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:07:28,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:07:28,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383b57a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28, skipping insertion in model container [2020-12-23 00:07:28,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:07:28,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:07:28,591 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~aa~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~bb~0,],[IdentifierExpression[~b~0,]]] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~cc~0,],[IdentifierExpression[~c~0,]]] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:07:28,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:07:28,631 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:07:28,648 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#aa~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#aa~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#bb~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#bb~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~b~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~cc~0,],[IdentifierExpression[~c~0,]]] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:07:28,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:07:28,679 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:07:28,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28 WrapperNode [2020-12-23 00:07:28,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:07:28,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:07:28,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:07:28,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:07:28,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:07:28,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:07:28,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:07:28,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:07:28,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (1/1) ... [2020-12-23 00:07:28,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:07:28,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:07:28,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:07:28,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:07:28,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:07:28,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:07:28,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:07:28,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:07:28,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:07:28,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:07:28,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:07:28,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:07:29,254 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:07:29,254 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 00:07:29,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:07:29 BoogieIcfgContainer [2020-12-23 00:07:29,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:07:29,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:07:29,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:07:29,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:07:29,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:07:28" (1/3) ... [2020-12-23 00:07:29,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4605c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:07:29, skipping insertion in model container [2020-12-23 00:07:29,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:28" (2/3) ... [2020-12-23 00:07:29,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4605c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:07:29, skipping insertion in model container [2020-12-23 00:07:29,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:07:29" (3/3) ... [2020-12-23 00:07:29,270 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2020-12-23 00:07:29,278 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:07:29,284 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:07:29,308 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:07:29,426 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:07:29,426 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:07:29,427 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:07:29,427 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:07:29,427 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:07:29,427 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:07:29,427 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:07:29,428 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:07:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-23 00:07:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:07:29,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:29,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:29,452 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash -700880873, now seen corresponding path program 1 times [2020-12-23 00:07:29,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:29,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494033817] [2020-12-23 00:07:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:07:29,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494033817] [2020-12-23 00:07:29,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:29,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:07:29,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031545954] [2020-12-23 00:07:29,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:07:29,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:29,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:07:29,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:07:29,687 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-23 00:07:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:29,708 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2020-12-23 00:07:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:07:29,709 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 00:07:29,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:29,720 INFO L225 Difference]: With dead ends: 40 [2020-12-23 00:07:29,720 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 00:07:29,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:07:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 00:07:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 00:07:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:07:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2020-12-23 00:07:29,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2020-12-23 00:07:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:29,767 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2020-12-23 00:07:29,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:07:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2020-12-23 00:07:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:07:29,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:29,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:29,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:07:29,769 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1883645503, now seen corresponding path program 1 times [2020-12-23 00:07:29,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:29,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686760168] [2020-12-23 00:07:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:07:29,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686760168] [2020-12-23 00:07:29,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:29,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:07:29,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793663554] [2020-12-23 00:07:29,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:07:29,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:29,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:07:29,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:29,840 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 3 states. [2020-12-23 00:07:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:29,865 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-12-23 00:07:29,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:07:29,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:07:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:29,868 INFO L225 Difference]: With dead ends: 34 [2020-12-23 00:07:29,868 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 00:07:29,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 00:07:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-23 00:07:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:07:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-23 00:07:29,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-12-23 00:07:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:29,877 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-23 00:07:29,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:07:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-23 00:07:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 00:07:29,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:29,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:29,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:07:29,879 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:29,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1756124227, now seen corresponding path program 1 times [2020-12-23 00:07:29,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:29,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524326209] [2020-12-23 00:07:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:07:29,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524326209] [2020-12-23 00:07:29,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:29,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:07:29,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724670582] [2020-12-23 00:07:29,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:07:29,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:07:29,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:29,934 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2020-12-23 00:07:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:29,992 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2020-12-23 00:07:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:07:29,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 00:07:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:29,995 INFO L225 Difference]: With dead ends: 36 [2020-12-23 00:07:29,995 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 00:07:29,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:29,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 00:07:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-12-23 00:07:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:07:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-23 00:07:30,002 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2020-12-23 00:07:30,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:30,002 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-23 00:07:30,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:07:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-23 00:07:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 00:07:30,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:30,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:30,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:07:30,004 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:30,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1655857333, now seen corresponding path program 1 times [2020-12-23 00:07:30,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:30,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314207660] [2020-12-23 00:07:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:07:30,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314207660] [2020-12-23 00:07:30,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486672265] [2020-12-23 00:07:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:07:30,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:07:30,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:30,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:07:30,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824352058] [2020-12-23 00:07:30,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:07:30,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:30,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:07:30,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:30,256 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2020-12-23 00:07:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:30,281 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-12-23 00:07:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:07:30,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 00:07:30,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:30,283 INFO L225 Difference]: With dead ends: 40 [2020-12-23 00:07:30,283 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 00:07:30,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:30,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 00:07:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-23 00:07:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:07:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-23 00:07:30,289 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 18 [2020-12-23 00:07:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:30,290 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-23 00:07:30,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:07:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-23 00:07:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:07:30,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:30,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:30,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:30,506 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:30,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1273395149, now seen corresponding path program 2 times [2020-12-23 00:07:30,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:30,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194524885] [2020-12-23 00:07:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:07:30,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194524885] [2020-12-23 00:07:30,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028533392] [2020-12-23 00:07:30,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:30,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:30,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:07:30,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:07:30,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:30,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:07:30,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265849865] [2020-12-23 00:07:30,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:07:30,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:30,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:07:30,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:07:30,694 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2020-12-23 00:07:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:30,807 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-12-23 00:07:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:07:30,808 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-23 00:07:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:30,809 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:07:30,809 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 00:07:30,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:07:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 00:07:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-12-23 00:07:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:07:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-23 00:07:30,818 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2020-12-23 00:07:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:30,818 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-23 00:07:30,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:07:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-23 00:07:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:07:30,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:30,820 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:31,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:31,024 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:31,027 INFO L82 PathProgramCache]: Analyzing trace with hash 461496583, now seen corresponding path program 3 times [2020-12-23 00:07:31,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:31,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713226235] [2020-12-23 00:07:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 00:07:31,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713226235] [2020-12-23 00:07:31,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681184670] [2020-12-23 00:07:31,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:31,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:07:31,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:07:31,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:07:31,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:31,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-23 00:07:31,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296236244] [2020-12-23 00:07:31,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:07:31,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:31,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:07:31,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:07:31,323 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 9 states. [2020-12-23 00:07:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:31,474 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-12-23 00:07:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:07:31,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-23 00:07:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:31,481 INFO L225 Difference]: With dead ends: 66 [2020-12-23 00:07:31,481 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 00:07:31,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:07:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 00:07:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-12-23 00:07:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 00:07:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-12-23 00:07:31,500 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 28 [2020-12-23 00:07:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:31,501 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-12-23 00:07:31,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:07:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-12-23 00:07:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 00:07:31,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:31,503 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:31,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:31,719 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:31,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:31,720 INFO L82 PathProgramCache]: Analyzing trace with hash 997298065, now seen corresponding path program 4 times [2020-12-23 00:07:31,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:31,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521834864] [2020-12-23 00:07:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:07:31,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521834864] [2020-12-23 00:07:31,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298539577] [2020-12-23 00:07:31,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:31,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:31,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:31,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:07:31,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:07:31,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:31,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:07:31,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623972368] [2020-12-23 00:07:31,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:07:31,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:31,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:07:31,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:07:31,922 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2020-12-23 00:07:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:31,950 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-12-23 00:07:31,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:07:31,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-23 00:07:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:31,951 INFO L225 Difference]: With dead ends: 70 [2020-12-23 00:07:31,952 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 00:07:31,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:07:31,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 00:07:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-23 00:07:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 00:07:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-12-23 00:07:31,959 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 36 [2020-12-23 00:07:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:31,959 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-12-23 00:07:31,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:07:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-12-23 00:07:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:07:31,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:31,961 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:32,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:32,175 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:32,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1492513901, now seen corresponding path program 5 times [2020-12-23 00:07:32,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:32,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398895405] [2020-12-23 00:07:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:07:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398895405] [2020-12-23 00:07:32,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115826849] [2020-12-23 00:07:32,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:32,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:07:32,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:07:32,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 00:07:32,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:32,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-23 00:07:32,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222523962] [2020-12-23 00:07:32,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:07:32,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:32,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:07:32,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:07:32,532 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 12 states. [2020-12-23 00:07:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:32,696 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2020-12-23 00:07:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:07:32,697 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-12-23 00:07:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:32,698 INFO L225 Difference]: With dead ends: 82 [2020-12-23 00:07:32,698 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 00:07:32,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 00:07:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-12-23 00:07:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:07:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-12-23 00:07:32,706 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 38 [2020-12-23 00:07:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:32,707 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-12-23 00:07:32,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:07:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-12-23 00:07:32,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:07:32,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:32,708 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:32,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:32,922 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:32,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:32,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2093123123, now seen corresponding path program 6 times [2020-12-23 00:07:32,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:32,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554276115] [2020-12-23 00:07:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-23 00:07:33,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554276115] [2020-12-23 00:07:33,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870759138] [2020-12-23 00:07:33,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:33,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:07:33,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:07:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-23 00:07:33,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:33,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-23 00:07:33,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824233848] [2020-12-23 00:07:33,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:07:33,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:33,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:07:33,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:07:33,300 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 14 states. [2020-12-23 00:07:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:33,534 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2020-12-23 00:07:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:07:33,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-23 00:07:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:33,536 INFO L225 Difference]: With dead ends: 96 [2020-12-23 00:07:33,536 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:07:33,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:07:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:07:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-12-23 00:07:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 00:07:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-12-23 00:07:33,544 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 46 [2020-12-23 00:07:33,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:33,544 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-12-23 00:07:33,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:07:33,544 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-12-23 00:07:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:07:33,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:33,546 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:33,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:33,762 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:33,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:33,763 INFO L82 PathProgramCache]: Analyzing trace with hash 411996503, now seen corresponding path program 7 times [2020-12-23 00:07:33,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:33,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211499792] [2020-12-23 00:07:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:33,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211499792] [2020-12-23 00:07:33,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221452563] [2020-12-23 00:07:33,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:07:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:34,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:34,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:07:34,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065186227] [2020-12-23 00:07:34,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:07:34,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:34,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:07:34,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:07:34,093 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 11 states. [2020-12-23 00:07:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:34,138 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2020-12-23 00:07:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:07:34,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-12-23 00:07:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:34,141 INFO L225 Difference]: With dead ends: 100 [2020-12-23 00:07:34,141 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:07:34,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:07:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:07:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-23 00:07:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:07:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-12-23 00:07:34,165 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 54 [2020-12-23 00:07:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:34,165 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-12-23 00:07:34,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:07:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-12-23 00:07:34,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:07:34,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:34,170 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:34,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:07:34,375 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:34,376 INFO L82 PathProgramCache]: Analyzing trace with hash -254488359, now seen corresponding path program 8 times [2020-12-23 00:07:34,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:34,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756312511] [2020-12-23 00:07:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:34,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756312511] [2020-12-23 00:07:34,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618885373] [2020-12-23 00:07:34,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:34,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:34,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:34,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:07:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:34,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:34,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:07:34,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770037914] [2020-12-23 00:07:34,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:07:34,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:34,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:07:34,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:07:34,662 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 12 states. [2020-12-23 00:07:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:34,705 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2020-12-23 00:07:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:07:34,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-12-23 00:07:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:34,707 INFO L225 Difference]: With dead ends: 102 [2020-12-23 00:07:34,707 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:07:34,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:07:34,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:07:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-23 00:07:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 00:07:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-12-23 00:07:34,714 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 56 [2020-12-23 00:07:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:34,714 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-12-23 00:07:34,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:07:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-12-23 00:07:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:07:34,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:34,716 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:34,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:07:34,930 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash -796313637, now seen corresponding path program 9 times [2020-12-23 00:07:34,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:34,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579522] [2020-12-23 00:07:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:35,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579522] [2020-12-23 00:07:35,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144196694] [2020-12-23 00:07:35,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:35,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:07:35,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:35,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:07:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-23 00:07:35,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:35,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-23 00:07:35,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072372092] [2020-12-23 00:07:35,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:07:35,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:35,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:07:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:35,426 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 18 states. [2020-12-23 00:07:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:35,730 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2020-12-23 00:07:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:07:35,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-12-23 00:07:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:35,732 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:07:35,732 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 00:07:35,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:07:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 00:07:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-12-23 00:07:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 00:07:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-12-23 00:07:35,748 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 58 [2020-12-23 00:07:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:35,749 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-12-23 00:07:35,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:07:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-12-23 00:07:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 00:07:35,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:35,750 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:35,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:35,953 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash 576129301, now seen corresponding path program 10 times [2020-12-23 00:07:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:35,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017673183] [2020-12-23 00:07:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-23 00:07:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017673183] [2020-12-23 00:07:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426073062] [2020-12-23 00:07:36,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:36,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:36,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:36,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:07:36,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-23 00:07:36,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:36,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:07:36,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680340287] [2020-12-23 00:07:36,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:07:36,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:36,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:07:36,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:07:36,352 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 14 states. [2020-12-23 00:07:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:36,398 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2020-12-23 00:07:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:07:36,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-12-23 00:07:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:36,400 INFO L225 Difference]: With dead ends: 118 [2020-12-23 00:07:36,400 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:07:36,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:07:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:07:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-23 00:07:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 00:07:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-12-23 00:07:36,407 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2020-12-23 00:07:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:36,407 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-12-23 00:07:36,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:07:36,408 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-12-23 00:07:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 00:07:36,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:36,409 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:36,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:36,625 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:36,626 INFO L82 PathProgramCache]: Analyzing trace with hash 515904919, now seen corresponding path program 11 times [2020-12-23 00:07:36,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:36,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483781358] [2020-12-23 00:07:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-23 00:07:36,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483781358] [2020-12-23 00:07:36,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553010822] [2020-12-23 00:07:36,786 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 [2020-12-23 00:07:37,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 00:07:37,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:37,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:07:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-23 00:07:37,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:37,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:07:37,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624193668] [2020-12-23 00:07:37,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:07:37,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:37,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:07:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:07:37,674 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 15 states. [2020-12-23 00:07:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:37,731 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2020-12-23 00:07:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:07:37,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-12-23 00:07:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:37,733 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:07:37,733 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 00:07:37,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:07:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 00:07:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-23 00:07:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 00:07:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-12-23 00:07:37,741 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 68 [2020-12-23 00:07:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:37,742 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-12-23 00:07:37,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:07:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-12-23 00:07:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 00:07:37,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:37,745 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:37,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:07:37,960 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1525151335, now seen corresponding path program 12 times [2020-12-23 00:07:37,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:37,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612213780] [2020-12-23 00:07:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-23 00:07:38,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612213780] [2020-12-23 00:07:38,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961461245] [2020-12-23 00:07:38,149 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:38,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:07:38,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:38,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:07:38,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-23 00:07:38,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:38,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2020-12-23 00:07:38,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648955515] [2020-12-23 00:07:38,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:07:38,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:38,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:07:38,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:07:38,814 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 22 states. [2020-12-23 00:07:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:39,200 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2020-12-23 00:07:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:07:39,200 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-12-23 00:07:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:39,201 INFO L225 Difference]: With dead ends: 132 [2020-12-23 00:07:39,201 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:07:39,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=426, Invalid=764, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:07:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:07:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2020-12-23 00:07:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 00:07:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-12-23 00:07:39,208 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 70 [2020-12-23 00:07:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:39,209 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-12-23 00:07:39,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:07:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-12-23 00:07:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 00:07:39,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:39,210 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:39,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:07:39,424 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:39,425 INFO L82 PathProgramCache]: Analyzing trace with hash -724753373, now seen corresponding path program 13 times [2020-12-23 00:07:39,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:39,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496710091] [2020-12-23 00:07:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:07:39,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496710091] [2020-12-23 00:07:39,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685521087] [2020-12-23 00:07:39,680 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:07:39,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:07:39,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:39,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:07:39,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498748793] [2020-12-23 00:07:39,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:07:39,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:39,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:07:39,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:07:39,857 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 17 states. [2020-12-23 00:07:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:39,912 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2020-12-23 00:07:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:07:39,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-12-23 00:07:39,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:39,913 INFO L225 Difference]: With dead ends: 136 [2020-12-23 00:07:39,914 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 00:07:39,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:07:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 00:07:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-23 00:07:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:07:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-12-23 00:07:39,920 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 78 [2020-12-23 00:07:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:39,920 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-12-23 00:07:39,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:07:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-12-23 00:07:39,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 00:07:39,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:39,922 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:40,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:07:40,136 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:40,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1098023515, now seen corresponding path program 14 times [2020-12-23 00:07:40,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:40,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799641296] [2020-12-23 00:07:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:07:40,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799641296] [2020-12-23 00:07:40,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864149334] [2020-12-23 00:07:40,390 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:40,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:40,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:40,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:07:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:07:40,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:40,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:07:40,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282652831] [2020-12-23 00:07:40,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:07:40,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:40,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:07:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:40,617 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 18 states. [2020-12-23 00:07:40,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:40,686 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2020-12-23 00:07:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:07:40,687 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-23 00:07:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:40,687 INFO L225 Difference]: With dead ends: 138 [2020-12-23 00:07:40,688 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:07:40,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:07:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 00:07:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:07:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2020-12-23 00:07:40,693 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 80 [2020-12-23 00:07:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:40,694 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2020-12-23 00:07:40,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:07:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2020-12-23 00:07:40,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:07:40,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:40,695 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:40,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:40,909 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:40,910 INFO L82 PathProgramCache]: Analyzing trace with hash 966622887, now seen corresponding path program 15 times [2020-12-23 00:07:40,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:40,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975849779] [2020-12-23 00:07:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:07:41,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975849779] [2020-12-23 00:07:41,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590873824] [2020-12-23 00:07:41,133 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:41,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:07:41,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:07:41,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2020-12-23 00:07:41,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:41,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2020-12-23 00:07:41,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281959813] [2020-12-23 00:07:41,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:07:41,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:41,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:07:41,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:07:41,802 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 26 states. [2020-12-23 00:07:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:42,274 INFO L93 Difference]: Finished difference Result 150 states and 190 transitions. [2020-12-23 00:07:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:07:42,274 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-12-23 00:07:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:42,275 INFO L225 Difference]: With dead ends: 150 [2020-12-23 00:07:42,275 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:07:42,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=613, Invalid=1109, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:07:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:07:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-12-23 00:07:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 00:07:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-12-23 00:07:42,281 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 82 [2020-12-23 00:07:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:42,282 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-12-23 00:07:42,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:07:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-12-23 00:07:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 00:07:42,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:42,283 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:42,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:07:42,498 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash -686887199, now seen corresponding path program 16 times [2020-12-23 00:07:42,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:42,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574886082] [2020-12-23 00:07:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-23 00:07:42,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574886082] [2020-12-23 00:07:42,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819666788] [2020-12-23 00:07:42,779 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:42,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:42,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:42,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:07:42,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-23 00:07:43,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:43,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:07:43,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461394589] [2020-12-23 00:07:43,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:07:43,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:43,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:07:43,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:07:43,053 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 20 states. [2020-12-23 00:07:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:43,122 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2020-12-23 00:07:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:07:43,123 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2020-12-23 00:07:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:43,124 INFO L225 Difference]: With dead ends: 154 [2020-12-23 00:07:43,124 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 00:07:43,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:07:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 00:07:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-23 00:07:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 00:07:43,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-12-23 00:07:43,130 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 90 [2020-12-23 00:07:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:43,130 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-12-23 00:07:43,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:07:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-12-23 00:07:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 00:07:43,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:43,132 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:43,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:43,348 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:43,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:43,349 INFO L82 PathProgramCache]: Analyzing trace with hash -862251677, now seen corresponding path program 17 times [2020-12-23 00:07:43,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:43,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659021674] [2020-12-23 00:07:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-23 00:07:43,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659021674] [2020-12-23 00:07:43,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469330645] [2020-12-23 00:07:43,610 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:52,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 00:07:52,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:07:52,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-23 00:07:52,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:52,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 00:07:52,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574848137] [2020-12-23 00:07:52,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:07:52,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:52,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:07:52,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:07:52,792 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 21 states. [2020-12-23 00:07:52,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:52,857 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-12-23 00:07:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:07:52,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 92 [2020-12-23 00:07:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:52,859 INFO L225 Difference]: With dead ends: 156 [2020-12-23 00:07:52,859 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:07:52,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:07:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:07:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-23 00:07:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 00:07:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2020-12-23 00:07:52,865 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 92 [2020-12-23 00:07:52,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:52,866 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2020-12-23 00:07:52,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:07:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2020-12-23 00:07:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 00:07:52,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:52,867 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:53,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:53,068 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1883790491, now seen corresponding path program 18 times [2020-12-23 00:07:53,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:53,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183176146] [2020-12-23 00:07:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-23 00:07:53,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183176146] [2020-12-23 00:07:53,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131322157] [2020-12-23 00:07:53,356 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:56,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:07:56,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:56,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:07:56,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2020-12-23 00:07:56,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:56,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2020-12-23 00:07:56,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557117179] [2020-12-23 00:07:56,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:07:56,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:56,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:07:56,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:07:56,314 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand 30 states. [2020-12-23 00:07:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:56,861 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2020-12-23 00:07:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:07:56,862 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 94 [2020-12-23 00:07:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:56,863 INFO L225 Difference]: With dead ends: 168 [2020-12-23 00:07:56,863 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:07:56,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:07:56,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:07:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2020-12-23 00:07:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 00:07:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2020-12-23 00:07:56,869 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 94 [2020-12-23 00:07:56,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:56,869 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2020-12-23 00:07:56,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:07:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2020-12-23 00:07:56,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 00:07:56,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:56,871 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:57,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:07:57,085 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:57,086 INFO L82 PathProgramCache]: Analyzing trace with hash 483770607, now seen corresponding path program 19 times [2020-12-23 00:07:57,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:57,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007319167] [2020-12-23 00:07:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 00:07:57,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007319167] [2020-12-23 00:07:57,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248163310] [2020-12-23 00:07:57,418 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:57,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:07:57,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 00:07:57,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:57,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:07:57,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376353255] [2020-12-23 00:07:57,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:07:57,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:57,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:07:57,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:07:57,615 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand 23 states. [2020-12-23 00:07:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:57,689 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2020-12-23 00:07:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:07:57,690 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 102 [2020-12-23 00:07:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:57,691 INFO L225 Difference]: With dead ends: 172 [2020-12-23 00:07:57,691 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:07:57,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:07:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:07:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-23 00:07:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 00:07:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2020-12-23 00:07:57,697 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 102 [2020-12-23 00:07:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:57,698 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2020-12-23 00:07:57,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:07:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2020-12-23 00:07:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 00:07:57,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:57,699 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:57,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:57,914 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:57,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1310575503, now seen corresponding path program 20 times [2020-12-23 00:07:57,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:57,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486139644] [2020-12-23 00:07:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 00:07:58,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486139644] [2020-12-23 00:07:58,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167003544] [2020-12-23 00:07:58,260 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:58,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:58,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:07:58,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 00:07:58,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:58,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 00:07:58,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957254647] [2020-12-23 00:07:58,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:07:58,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:58,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:07:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:07:58,474 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand 24 states. [2020-12-23 00:07:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:58,552 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2020-12-23 00:07:58,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 00:07:58,552 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 104 [2020-12-23 00:07:58,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:58,553 INFO L225 Difference]: With dead ends: 174 [2020-12-23 00:07:58,553 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:07:58,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:07:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:07:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-23 00:07:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 00:07:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2020-12-23 00:07:58,559 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 104 [2020-12-23 00:07:58,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:58,559 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2020-12-23 00:07:58,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:07:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2020-12-23 00:07:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:07:58,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:58,560 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:58,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:07:58,774 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash 899665779, now seen corresponding path program 21 times [2020-12-23 00:07:58,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:58,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132413159] [2020-12-23 00:07:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 00:07:59,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132413159] [2020-12-23 00:07:59,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360036401] [2020-12-23 00:07:59,139 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:59,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:07:59,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:07:59,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2020-12-23 00:07:59,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:59,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2020-12-23 00:07:59,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476574144] [2020-12-23 00:07:59,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:07:59,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:59,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:07:59,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:07:59,973 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 34 states. [2020-12-23 00:08:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:00,627 INFO L93 Difference]: Finished difference Result 186 states and 234 transitions. [2020-12-23 00:08:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:08:00,628 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 106 [2020-12-23 00:08:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:00,629 INFO L225 Difference]: With dead ends: 186 [2020-12-23 00:08:00,629 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 00:08:00,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1089, Invalid=1991, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 00:08:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 00:08:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2020-12-23 00:08:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 00:08:00,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-12-23 00:08:00,635 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 106 [2020-12-23 00:08:00,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:00,635 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-12-23 00:08:00,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:08:00,636 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-12-23 00:08:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 00:08:00,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:00,637 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:00,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:08:00,851 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:00,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1453645485, now seen corresponding path program 22 times [2020-12-23 00:08:00,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:00,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491902117] [2020-12-23 00:08:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-12-23 00:08:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491902117] [2020-12-23 00:08:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415325720] [2020-12-23 00:08:01,232 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:01,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:08:01,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:08:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-12-23 00:08:01,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:01,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 00:08:01,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485283903] [2020-12-23 00:08:01,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:08:01,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:08:01,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:08:01,587 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 26 states. [2020-12-23 00:08:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:01,688 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2020-12-23 00:08:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 00:08:01,689 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 114 [2020-12-23 00:08:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:01,690 INFO L225 Difference]: With dead ends: 190 [2020-12-23 00:08:01,690 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 00:08:01,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:08:01,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 00:08:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-12-23 00:08:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 00:08:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2020-12-23 00:08:01,696 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 114 [2020-12-23 00:08:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:01,696 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2020-12-23 00:08:01,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:08:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2020-12-23 00:08:01,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 00:08:01,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:01,698 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:01,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:01,911 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:01,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:01,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1272570065, now seen corresponding path program 23 times [2020-12-23 00:08:01,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:01,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660504896] [2020-12-23 00:08:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-12-23 00:08:02,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660504896] [2020-12-23 00:08:02,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631622929] [2020-12-23 00:08:02,347 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:33,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 00:08:33,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:33,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:08:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2020-12-23 00:08:33,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:33,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13] total 37 [2020-12-23 00:08:33,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45724876] [2020-12-23 00:08:33,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:08:33,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:33,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:08:33,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=930, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:08:33,623 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 37 states. [2020-12-23 00:08:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:34,464 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-12-23 00:08:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:08:34,465 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 116 [2020-12-23 00:08:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:34,466 INFO L225 Difference]: With dead ends: 202 [2020-12-23 00:08:34,466 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 00:08:34,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1290, Invalid=2370, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 00:08:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 00:08:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-12-23 00:08:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 00:08:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2020-12-23 00:08:34,477 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 116 [2020-12-23 00:08:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:34,477 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2020-12-23 00:08:34,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:08:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2020-12-23 00:08:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 00:08:34,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:34,478 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:34,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:08:34,694 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:34,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:34,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1865507257, now seen corresponding path program 24 times [2020-12-23 00:08:34,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:34,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981018186] [2020-12-23 00:08:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-12-23 00:08:35,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981018186] [2020-12-23 00:08:35,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973629253] [2020-12-23 00:08:35,162 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:49,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 00:08:49,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:08:49,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-12-23 00:08:50,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:50,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2020-12-23 00:08:50,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691015205] [2020-12-23 00:08:50,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 00:08:50,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:50,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 00:08:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:08:50,291 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 39 states. [2020-12-23 00:08:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:51,152 INFO L93 Difference]: Finished difference Result 216 states and 272 transitions. [2020-12-23 00:08:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:08:51,153 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 124 [2020-12-23 00:08:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:51,154 INFO L225 Difference]: With dead ends: 216 [2020-12-23 00:08:51,154 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 00:08:51,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1416, Invalid=2616, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 00:08:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 00:08:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2020-12-23 00:08:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 00:08:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 162 transitions. [2020-12-23 00:08:51,161 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 162 transitions. Word has length 124 [2020-12-23 00:08:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:51,162 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 162 transitions. [2020-12-23 00:08:51,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 00:08:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 162 transitions. [2020-12-23 00:08:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 00:08:51,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:51,163 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:51,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:51,377 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:51,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1269828109, now seen corresponding path program 25 times [2020-12-23 00:08:51,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:51,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642968462] [2020-12-23 00:08:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-23 00:08:51,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642968462] [2020-12-23 00:08:51,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090186445] [2020-12-23 00:08:51,915 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:08:52,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-23 00:08:52,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:52,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:08:52,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701243306] [2020-12-23 00:08:52,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:08:52,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:52,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:08:52,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:08:52,184 INFO L87 Difference]: Start difference. First operand 135 states and 162 transitions. Second operand 29 states. [2020-12-23 00:08:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:52,289 INFO L93 Difference]: Finished difference Result 220 states and 274 transitions. [2020-12-23 00:08:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:08:52,290 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 132 [2020-12-23 00:08:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:52,291 INFO L225 Difference]: With dead ends: 220 [2020-12-23 00:08:52,291 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 00:08:52,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:08:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 00:08:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-12-23 00:08:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 00:08:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2020-12-23 00:08:52,297 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 132 [2020-12-23 00:08:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:52,297 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2020-12-23 00:08:52,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:08:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2020-12-23 00:08:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 00:08:52,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:52,298 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:52,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:08:52,512 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:52,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash 478599669, now seen corresponding path program 26 times [2020-12-23 00:08:52,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:52,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750478183] [2020-12-23 00:08:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-23 00:08:53,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750478183] [2020-12-23 00:08:53,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075833626] [2020-12-23 00:08:53,045 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:53,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:08:53,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:08:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-23 00:08:53,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:53,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 00:08:53,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537016109] [2020-12-23 00:08:53,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:08:53,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:53,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:08:53,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:08:53,312 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand 30 states. [2020-12-23 00:08:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:53,421 INFO L93 Difference]: Finished difference Result 222 states and 276 transitions. [2020-12-23 00:08:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:08:53,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 134 [2020-12-23 00:08:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:53,424 INFO L225 Difference]: With dead ends: 222 [2020-12-23 00:08:53,424 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 00:08:53,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:08:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 00:08:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-12-23 00:08:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 00:08:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2020-12-23 00:08:53,430 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 134 [2020-12-23 00:08:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:53,430 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2020-12-23 00:08:53,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:08:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2020-12-23 00:08:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 00:08:53,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:53,431 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:53,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:08:53,647 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:53,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:53,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1385481591, now seen corresponding path program 27 times [2020-12-23 00:08:53,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:53,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478406064] [2020-12-23 00:08:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-23 00:08:54,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478406064] [2020-12-23 00:08:54,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396666560] [2020-12-23 00:08:54,261 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:55,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-23 00:08:55,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:55,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:08:55,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2020-12-23 00:08:55,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:55,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15] total 43 [2020-12-23 00:08:55,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713793555] [2020-12-23 00:08:55,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:08:55,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:08:55,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:08:55,984 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 43 states. [2020-12-23 00:08:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:57,112 INFO L93 Difference]: Finished difference Result 234 states and 294 transitions. [2020-12-23 00:08:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 00:08:57,112 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 136 [2020-12-23 00:08:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:57,114 INFO L225 Difference]: With dead ends: 234 [2020-12-23 00:08:57,114 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 00:08:57,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1743, Invalid=3227, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 00:08:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 00:08:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-12-23 00:08:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 00:08:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 176 transitions. [2020-12-23 00:08:57,121 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 176 transitions. Word has length 136 [2020-12-23 00:08:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:57,121 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 176 transitions. [2020-12-23 00:08:57,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:08:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 176 transitions. [2020-12-23 00:08:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 00:08:57,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:57,122 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:57,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:57,336 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:57,337 INFO L82 PathProgramCache]: Analyzing trace with hash -975122687, now seen corresponding path program 28 times [2020-12-23 00:08:57,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:57,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307342311] [2020-12-23 00:08:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2020-12-23 00:08:57,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307342311] [2020-12-23 00:08:57,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207932348] [2020-12-23 00:08:57,918 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:58,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:08:58,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:58,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:08:58,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2020-12-23 00:08:58,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:58,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 16] total 45 [2020-12-23 00:08:58,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798182893] [2020-12-23 00:08:58,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:08:58,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:58,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:08:58,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=1396, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:08:58,790 INFO L87 Difference]: Start difference. First operand 147 states and 176 transitions. Second operand 45 states. [2020-12-23 00:09:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:09:00,028 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2020-12-23 00:09:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:09:00,029 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 144 [2020-12-23 00:09:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:09:00,030 INFO L225 Difference]: With dead ends: 248 [2020-12-23 00:09:00,030 INFO L226 Difference]: Without dead ends: 160 [2020-12-23 00:09:00,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1889, Invalid=3513, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 00:09:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-23 00:09:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2020-12-23 00:09:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 00:09:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 186 transitions. [2020-12-23 00:09:00,038 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 186 transitions. Word has length 144 [2020-12-23 00:09:00,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:09:00,038 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 186 transitions. [2020-12-23 00:09:00,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:09:00,039 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 186 transitions. [2020-12-23 00:09:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 00:09:00,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:09:00,040 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:09:00,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:09:00,254 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:09:00,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:09:00,254 INFO L82 PathProgramCache]: Analyzing trace with hash 24167995, now seen corresponding path program 29 times [2020-12-23 00:09:00,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:09:00,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754510070] [2020-12-23 00:09:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:09:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:09:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-12-23 00:09:00,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754510070] [2020-12-23 00:09:00,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664594482] [2020-12-23 00:09:00,942 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true