/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_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:57:44,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:57:44,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:57:44,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:57:44,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:57:44,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:57:44,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:57:44,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:57:44,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:57:44,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:57:44,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:57:44,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-22 23:57:44,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:57:44,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:57:44,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:57:44,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:57:44,708 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:57:44,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:57:44,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:57:44,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:57:44,711 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:57:44,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:57:44,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:57:44,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:57:44,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:57:44,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:57:44,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:57:44,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:57:44,713 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:57:44,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:57:44,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:57:44,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:57:44,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:57:44,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:57:44,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:57:44,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:57:44,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:57:44,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:57:44,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:57:44,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:57:44,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:57:44,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:57:45,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:57:45,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:57:45,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:57:45,103 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:57:45,110 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:57:45,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i [2020-12-22 23:57:45,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7ebc0d898/2124b070301a4ec0a0df57e80b10f7c1/FLAG939e3d6ad [2020-12-22 23:57:45,818 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:57:45,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i [2020-12-22 23:57:45,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7ebc0d898/2124b070301a4ec0a0df57e80b10f7c1/FLAG939e3d6ad [2020-12-22 23:57:46,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7ebc0d898/2124b070301a4ec0a0df57e80b10f7c1 [2020-12-22 23:57:46,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:57:46,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:57:46,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:57:46,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:57:46,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:57:46,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c8cfa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46, skipping insertion in model container [2020-12-22 23:57:46,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:57:46,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:57:46,412 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_copyInitSum3_ground.i[821,834] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:57:46,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:57:46,441 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:57:46,457 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_copyInitSum3_ground.i[821,834] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:57:46,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:57:46,483 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:57:46,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46 WrapperNode [2020-12-22 23:57:46,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:57:46,485 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:57:46,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:57:46,485 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:57:46,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:57:46,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:57:46,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:57:46,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:57:46,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (1/1) ... [2020-12-22 23:57:46,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:57:46,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:57:46,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:57:46,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:57:46,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (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 [2020-12-22 23:57:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:57:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:57:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:57:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:57:46,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:57:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:57:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:57:47,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:57:47,046 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 23:57:47,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:57:47 BoogieIcfgContainer [2020-12-22 23:57:47,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:57:47,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:57:47,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:57:47,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:57:47,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:57:46" (1/3) ... [2020-12-22 23:57:47,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac50bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:57:47, skipping insertion in model container [2020-12-22 23:57:47,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:46" (2/3) ... [2020-12-22 23:57:47,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac50bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:57:47, skipping insertion in model container [2020-12-22 23:57:47,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:57:47" (3/3) ... [2020-12-22 23:57:47,095 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2020-12-22 23:57:47,109 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:57:47,120 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:57:47,153 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:57:47,201 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:57:47,204 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:57:47,204 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:57:47,204 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:57:47,205 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:57:47,205 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:57:47,205 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:57:47,205 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:57:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 23:57:47,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 23:57:47,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:47,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:47,233 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:47,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:47,241 INFO L82 PathProgramCache]: Analyzing trace with hash -211808190, now seen corresponding path program 1 times [2020-12-22 23:57:47,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:47,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265296700] [2020-12-22 23:57:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:57:47,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265296700] [2020-12-22 23:57:47,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:57:47,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:57:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072025137] [2020-12-22 23:57:47,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:57:47,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:47,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:57:47,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:57:47,472 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-12-22 23:57:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:47,568 INFO L93 Difference]: Finished difference Result 50 states and 76 transitions. [2020-12-22 23:57:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:57:47,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-22 23:57:47,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:47,581 INFO L225 Difference]: With dead ends: 50 [2020-12-22 23:57:47,581 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 23:57:47,584 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 [2020-12-22 23:57:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 23:57:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-22 23:57:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 23:57:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-22 23:57:47,621 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2020-12-22 23:57:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:47,622 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-22 23:57:47,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:57:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-22 23:57:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 23:57:47,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:47,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:47,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:57:47,627 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash 343774103, now seen corresponding path program 1 times [2020-12-22 23:57:47,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:47,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586163834] [2020-12-22 23:57:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:57:47,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586163834] [2020-12-22 23:57:47,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196405276] [2020-12-22 23:57:47,710 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 [2020-12-22 23:57:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:47,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:57:47,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:57:47,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:47,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:57:47,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728323945] [2020-12-22 23:57:47,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:57:47,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:47,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:57:47,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:47,877 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-12-22 23:57:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:47,987 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-12-22 23:57:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:57:47,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-22 23:57:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:47,989 INFO L225 Difference]: With dead ends: 52 [2020-12-22 23:57:47,989 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 23:57:47,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 23:57:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-12-22 23:57:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 23:57:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-22 23:57:47,997 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-12-22 23:57:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:47,997 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-22 23:57:47,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:57:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-22 23:57:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 23:57:47,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:47,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:48,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:57:48,214 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:48,215 INFO L82 PathProgramCache]: Analyzing trace with hash -314392746, now seen corresponding path program 2 times [2020-12-22 23:57:48,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:48,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692136383] [2020-12-22 23:57:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 23:57:48,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692136383] [2020-12-22 23:57:48,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554813] [2020-12-22 23:57:48,316 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 [2020-12-22 23:57:48,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:57:48,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:48,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:57:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 23:57:48,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:48,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 23:57:48,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726814236] [2020-12-22 23:57:48,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 23:57:48,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 23:57:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:57:48,472 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-12-22 23:57:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:48,593 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-12-22 23:57:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 23:57:48,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-22 23:57:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:48,595 INFO L225 Difference]: With dead ends: 65 [2020-12-22 23:57:48,595 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 23:57:48,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:57:48,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 23:57:48,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-12-22 23:57:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 23:57:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-22 23:57:48,604 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2020-12-22 23:57:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:48,604 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-22 23:57:48,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 23:57:48,604 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-22 23:57:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 23:57:48,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:48,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:48,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:48,816 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash -881131413, now seen corresponding path program 3 times [2020-12-22 23:57:48,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:48,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167118455] [2020-12-22 23:57:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 23:57:48,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167118455] [2020-12-22 23:57:48,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550837387] [2020-12-22 23:57:48,979 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 [2020-12-22 23:57:49,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:57:49,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:49,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:57:49,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 23:57:49,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:49,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 23:57:49,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524195850] [2020-12-22 23:57:49,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:57:49,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:49,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:57:49,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:57:49,176 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2020-12-22 23:57:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:49,325 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-12-22 23:57:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:57:49,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-22 23:57:49,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:49,328 INFO L225 Difference]: With dead ends: 78 [2020-12-22 23:57:49,328 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 23:57:49,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:57:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 23:57:49,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-22 23:57:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 23:57:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-22 23:57:49,351 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 34 [2020-12-22 23:57:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:49,351 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-22 23:57:49,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:57:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-22 23:57:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 23:57:49,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:49,355 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:49,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:49,570 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:49,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1712584598, now seen corresponding path program 4 times [2020-12-22 23:57:49,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:49,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493288382] [2020-12-22 23:57:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 23:57:49,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493288382] [2020-12-22 23:57:49,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398843788] [2020-12-22 23:57:49,685 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 [2020-12-22 23:57:49,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:57:49,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:49,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:57:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 23:57:49,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:49,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:57:49,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164993021] [2020-12-22 23:57:49,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:57:49,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:57:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:57:49,884 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 8 states. [2020-12-22 23:57:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:50,025 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-12-22 23:57:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:57:50,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-22 23:57:50,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:50,027 INFO L225 Difference]: With dead ends: 91 [2020-12-22 23:57:50,027 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 23:57:50,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:57:50,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 23:57:50,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-12-22 23:57:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 23:57:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-22 23:57:50,034 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 41 [2020-12-22 23:57:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:50,034 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-22 23:57:50,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:57:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-22 23:57:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 23:57:50,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:50,036 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:50,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:50,248 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:50,250 INFO L82 PathProgramCache]: Analyzing trace with hash 702691135, now seen corresponding path program 5 times [2020-12-22 23:57:50,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:50,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395718091] [2020-12-22 23:57:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-22 23:57:50,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395718091] [2020-12-22 23:57:50,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467140012] [2020-12-22 23:57:50,367 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 [2020-12-22 23:57:51,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 23:57:51,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:51,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:57:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-12-22 23:57:52,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:52,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 23:57:52,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241409441] [2020-12-22 23:57:52,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:57:52,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:52,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:57:52,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:57:52,031 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 9 states. [2020-12-22 23:57:52,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:52,209 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-12-22 23:57:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:57:52,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-12-22 23:57:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:52,214 INFO L225 Difference]: With dead ends: 104 [2020-12-22 23:57:52,214 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 23:57:52,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:57:52,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 23:57:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-22 23:57:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 23:57:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-12-22 23:57:52,234 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 48 [2020-12-22 23:57:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:52,234 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-12-22 23:57:52,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:57:52,235 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-12-22 23:57:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 23:57:52,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:52,236 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:52,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:57:52,439 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:52,440 INFO L82 PathProgramCache]: Analyzing trace with hash 240839550, now seen corresponding path program 6 times [2020-12-22 23:57:52,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:52,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362748570] [2020-12-22 23:57:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-22 23:57:52,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362748570] [2020-12-22 23:57:52,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14938868] [2020-12-22 23:57:52,617 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 [2020-12-22 23:57:53,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 23:57:53,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:53,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:57:53,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-22 23:57:53,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:53,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 23:57:53,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462472589] [2020-12-22 23:57:53,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:57:53,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:53,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:57:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:57:53,251 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 10 states. [2020-12-22 23:57:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:53,371 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-12-22 23:57:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:57:53,371 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-12-22 23:57:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:53,372 INFO L225 Difference]: With dead ends: 117 [2020-12-22 23:57:53,372 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 23:57:53,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:57:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 23:57:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-12-22 23:57:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 23:57:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-12-22 23:57:53,379 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 55 [2020-12-22 23:57:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:53,380 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-12-22 23:57:53,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:57:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-12-22 23:57:53,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 23:57:53,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:53,381 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:53,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:53,596 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:53,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2046937069, now seen corresponding path program 7 times [2020-12-22 23:57:53,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:53,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148075370] [2020-12-22 23:57:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 23:57:53,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148075370] [2020-12-22 23:57:53,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979656568] [2020-12-22 23:57:53,774 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 [2020-12-22 23:57:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:53,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:57:53,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 23:57:53,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:53,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:57:53,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606602538] [2020-12-22 23:57:53,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:57:53,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:53,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:57:53,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:57:53,986 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 11 states. [2020-12-22 23:57:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:54,120 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2020-12-22 23:57:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:57:54,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-12-22 23:57:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:54,122 INFO L225 Difference]: With dead ends: 130 [2020-12-22 23:57:54,122 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 23:57:54,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:57:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 23:57:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-12-22 23:57:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 23:57:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-22 23:57:54,130 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2020-12-22 23:57:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:54,130 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-22 23:57:54,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:57:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-22 23:57:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 23:57:54,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:54,131 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:54,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:54,346 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:54,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1433507694, now seen corresponding path program 8 times [2020-12-22 23:57:54,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:54,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038705008] [2020-12-22 23:57:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-12-22 23:57:54,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038705008] [2020-12-22 23:57:54,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105255969] [2020-12-22 23:57:54,465 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 [2020-12-22 23:57:54,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:57:54,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:54,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:57:54,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-12-22 23:57:54,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:54,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:57:54,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484753202] [2020-12-22 23:57:54,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:57:54,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:54,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:57:54,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:57:54,642 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 12 states. [2020-12-22 23:57:54,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:54,781 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2020-12-22 23:57:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:57:54,782 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-12-22 23:57:54,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:54,783 INFO L225 Difference]: With dead ends: 143 [2020-12-22 23:57:54,783 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 23:57:54,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:57:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 23:57:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-12-22 23:57:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 23:57:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-12-22 23:57:54,791 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 69 [2020-12-22 23:57:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:54,791 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-12-22 23:57:54,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:57:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-12-22 23:57:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 23:57:54,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:54,792 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:55,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 23:57:55,006 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:55,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:55,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1545208551, now seen corresponding path program 9 times [2020-12-22 23:57:55,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:55,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487408649] [2020-12-22 23:57:55,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-22 23:57:55,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487408649] [2020-12-22 23:57:55,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060096090] [2020-12-22 23:57:55,133 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 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 [2020-12-22 23:57:55,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 23:57:55,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:55,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:57:55,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-22 23:57:55,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:55,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 23:57:55,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074146323] [2020-12-22 23:57:55,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:57:55,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:57:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:57:55,762 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 13 states. [2020-12-22 23:57:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:55,937 INFO L93 Difference]: Finished difference Result 156 states and 167 transitions. [2020-12-22 23:57:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:57:55,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-12-22 23:57:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:55,938 INFO L225 Difference]: With dead ends: 156 [2020-12-22 23:57:55,939 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 23:57:55,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:57:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 23:57:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-12-22 23:57:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 23:57:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-12-22 23:57:55,963 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 76 [2020-12-22 23:57:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:55,964 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-12-22 23:57:55,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:57:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-12-22 23:57:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 23:57:55,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:55,966 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:56,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:56,171 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:56,171 INFO L82 PathProgramCache]: Analyzing trace with hash -108691546, now seen corresponding path program 10 times [2020-12-22 23:57:56,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:56,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107288318] [2020-12-22 23:57:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-22 23:57:56,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107288318] [2020-12-22 23:57:56,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378029931] [2020-12-22 23:57:56,311 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 [2020-12-22 23:57:56,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:57:56,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:56,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:57:56,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-12-22 23:57:56,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:56,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:57:56,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210079415] [2020-12-22 23:57:56,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:57:56,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:56,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:57:56,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:57:56,499 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 14 states. [2020-12-22 23:57:56,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:56,650 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2020-12-22 23:57:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:57:56,650 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-12-22 23:57:56,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:56,651 INFO L225 Difference]: With dead ends: 169 [2020-12-22 23:57:56,651 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 23:57:56,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:57:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 23:57:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-12-22 23:57:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 23:57:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-12-22 23:57:56,657 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 83 [2020-12-22 23:57:56,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:56,657 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-12-22 23:57:56,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:57:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-12-22 23:57:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 23:57:56,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:56,659 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:56,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:56,873 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash -293562437, now seen corresponding path program 11 times [2020-12-22 23:57:56,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:56,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506533150] [2020-12-22 23:57:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 23:57:57,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506533150] [2020-12-22 23:57:57,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998303952] [2020-12-22 23:57:57,049 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