/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_init3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:51:42,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:51:42,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:51:42,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:51:42,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:51:42,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:51:42,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:51:42,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:51:42,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:51:42,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:51:42,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:51:42,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:51:42,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:51:42,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:51:42,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:51:42,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:51:42,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:51:42,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:51:42,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:51:42,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:51:42,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:51:42,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:51:42,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:51:42,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:51:42,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:51:42,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:51:42,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:51:42,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:51:42,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:51:42,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:51:42,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:51:42,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:51:42,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:51:42,821 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:51:42,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:51:42,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:51:42,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:51:42,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:51:42,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:51:42,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:51:42,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:51:42,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:51:42,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:51:42,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:51:42,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:51:42,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:51:42,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:51:42,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:51:42,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:51:42,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:51:42,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:51:42,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:51:42,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:51:42,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:51:42,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:51:43,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:51:43,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:51:43,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:51:43,337 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:51:43,338 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:51:43,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init3_ground-2.i [2021-01-06 09:51:43,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2d1388bad/1a3b1abf5dee481ba82abdf98ecd2293/FLAG4833ef54a [2021-01-06 09:51:44,018 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:51:44,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init3_ground-2.i [2021-01-06 09:51:44,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2d1388bad/1a3b1abf5dee481ba82abdf98ecd2293/FLAG4833ef54a [2021-01-06 09:51:44,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2d1388bad/1a3b1abf5dee481ba82abdf98ecd2293 [2021-01-06 09:51:44,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:51:44,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:51:44,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:51:44,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:51:44,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:51:44,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653ec62c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44, skipping insertion in model container [2021-01-06 09:51:44,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:51:44,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:51:44,687 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_init3_ground-2.i[816,829] 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[~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[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:51:44,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:51:44,730 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:51:44,751 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_init3_ground-2.i[816,829] 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[~#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[~#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[~x~0,] [2021-01-06 09:51:44,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:51:44,793 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:51:44,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44 WrapperNode [2021-01-06 09:51:44,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:51:44,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:51:44,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:51:44,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:51:44,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:51:44,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:51:44,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:51:44,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:51:44,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (1/1) ... [2021-01-06 09:51:44,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:51:44,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:51:44,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:51:44,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:51:44,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:51:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:51:45,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:51:45,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:51:45,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:51:45,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:51:45,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:51:45,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:51:45,412 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:51:45,413 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 09:51:45,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:51:45 BoogieIcfgContainer [2021-01-06 09:51:45,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:51:45,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:51:45,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:51:45,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:51:45,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:51:44" (1/3) ... [2021-01-06 09:51:45,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e899ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:51:45, skipping insertion in model container [2021-01-06 09:51:45,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:44" (2/3) ... [2021-01-06 09:51:45,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e899ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:51:45, skipping insertion in model container [2021-01-06 09:51:45,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:51:45" (3/3) ... [2021-01-06 09:51:45,444 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-2.i [2021-01-06 09:51:45,462 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:51:45,481 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:51:45,559 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:51:45,595 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:51:45,595 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:51:45,595 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:51:45,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:51:45,596 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:51:45,596 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:51:45,596 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:51:45,596 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:51:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 09:51:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 09:51:45,621 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:45,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:45,623 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:45,631 INFO L82 PathProgramCache]: Analyzing trace with hash -93359874, now seen corresponding path program 1 times [2021-01-06 09:51:45,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:45,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007139338] [2021-01-06 09:51:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:51:45,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007139338] [2021-01-06 09:51:45,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:51:45,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:51:45,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662699479] [2021-01-06 09:51:45,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:51:45,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:45,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:51:45,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:51:45,972 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-01-06 09:51:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:46,074 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2021-01-06 09:51:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:51:46,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 09:51:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:46,090 INFO L225 Difference]: With dead ends: 36 [2021-01-06 09:51:46,091 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 09:51:46,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:51:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 09:51:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 09:51:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 09:51:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-01-06 09:51:46,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2021-01-06 09:51:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:46,140 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-01-06 09:51:46,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:51:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-01-06 09:51:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 09:51:46,143 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:46,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:46,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:51:46,145 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:46,151 INFO L82 PathProgramCache]: Analyzing trace with hash -168681064, now seen corresponding path program 1 times [2021-01-06 09:51:46,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:46,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178009058] [2021-01-06 09:51:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:51:46,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178009058] [2021-01-06 09:51:46,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325112108] [2021-01-06 09:51:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:46,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:51:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:51:46,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:46,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:51:46,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209053540] [2021-01-06 09:51:46,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:51:46,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:46,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:51:46,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:51:46,393 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2021-01-06 09:51:46,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:46,439 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-01-06 09:51:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:51:46,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 09:51:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:46,440 INFO L225 Difference]: With dead ends: 33 [2021-01-06 09:51:46,440 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:51:46,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:51:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:51:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 09:51:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 09:51:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 09:51:46,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-01-06 09:51:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:46,448 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 09:51:46,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:51:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 09:51:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:51:46,449 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:46,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:46,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:51:46,664 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:46,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:46,666 INFO L82 PathProgramCache]: Analyzing trace with hash -873526594, now seen corresponding path program 2 times [2021-01-06 09:51:46,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:46,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757839892] [2021-01-06 09:51:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:51:46,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757839892] [2021-01-06 09:51:46,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999122397] [2021-01-06 09:51:46,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:46,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:51:46,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:51:46,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:51:46,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:46,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:51:46,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405908849] [2021-01-06 09:51:46,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:51:46,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:46,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:51:46,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:51:46,847 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2021-01-06 09:51:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:46,895 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-01-06 09:51:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:51:46,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 09:51:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:46,897 INFO L225 Difference]: With dead ends: 38 [2021-01-06 09:51:46,897 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 09:51:46,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:51:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 09:51:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 09:51:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 09:51:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 09:51:46,904 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2021-01-06 09:51:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:46,904 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 09:51:46,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:51:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 09:51:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 09:51:46,905 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:46,906 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:47,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:47,112 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:47,114 INFO L82 PathProgramCache]: Analyzing trace with hash -778322088, now seen corresponding path program 3 times [2021-01-06 09:51:47,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:47,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612134805] [2021-01-06 09:51:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:51:47,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612134805] [2021-01-06 09:51:47,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13847818] [2021-01-06 09:51:47,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:47,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:51:47,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:51:47,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:51:47,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:47,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:51:47,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046002496] [2021-01-06 09:51:47,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:51:47,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:47,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:51:47,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:51:47,311 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2021-01-06 09:51:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:47,364 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-01-06 09:51:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:51:47,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2021-01-06 09:51:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:47,366 INFO L225 Difference]: With dead ends: 43 [2021-01-06 09:51:47,366 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 09:51:47,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:51:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 09:51:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 09:51:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:51:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-01-06 09:51:47,373 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2021-01-06 09:51:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:47,374 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-01-06 09:51:47,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:51:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-01-06 09:51:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:51:47,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:47,375 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:47,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:47,590 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:47,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1736848510, now seen corresponding path program 4 times [2021-01-06 09:51:47,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:47,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754345935] [2021-01-06 09:51:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 09:51:47,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754345935] [2021-01-06 09:51:47,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127436614] [2021-01-06 09:51:47,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:47,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:51:47,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:51:47,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 09:51:47,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:47,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:51:47,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65907311] [2021-01-06 09:51:47,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:51:47,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:47,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:51:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:51:47,803 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2021-01-06 09:51:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:47,859 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-01-06 09:51:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:51:47,859 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2021-01-06 09:51:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:47,860 INFO L225 Difference]: With dead ends: 48 [2021-01-06 09:51:47,860 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 09:51:47,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:51:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 09:51:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 09:51:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 09:51:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-01-06 09:51:47,867 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2021-01-06 09:51:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:47,868 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-01-06 09:51:47,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:51:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-01-06 09:51:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 09:51:47,869 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:47,869 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:48,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:48,083 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1884156648, now seen corresponding path program 5 times [2021-01-06 09:51:48,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:48,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240942224] [2021-01-06 09:51:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 09:51:48,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240942224] [2021-01-06 09:51:48,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991221799] [2021-01-06 09:51:48,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:48,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 09:51:48,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:48,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:51:48,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 09:51:48,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:48,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:51:48,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144511098] [2021-01-06 09:51:48,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:51:48,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:48,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:51:48,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:51:48,467 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2021-01-06 09:51:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:48,535 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-01-06 09:51:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:51:48,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2021-01-06 09:51:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:48,539 INFO L225 Difference]: With dead ends: 53 [2021-01-06 09:51:48,539 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:51:48,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:51:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:51:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 09:51:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 09:51:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-01-06 09:51:48,557 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2021-01-06 09:51:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:48,557 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-01-06 09:51:48,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:51:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-01-06 09:51:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:51:48,559 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:48,559 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:48,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:51:48,775 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:48,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1909780030, now seen corresponding path program 6 times [2021-01-06 09:51:48,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:48,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597274946] [2021-01-06 09:51:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-01-06 09:51:48,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597274946] [2021-01-06 09:51:48,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252391932] [2021-01-06 09:51:48,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:49,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 09:51:49,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:49,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:51:49,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-01-06 09:51:49,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:49,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:51:49,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157708855] [2021-01-06 09:51:49,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:51:49,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:49,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:51:49,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:51:49,153 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2021-01-06 09:51:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:49,222 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-01-06 09:51:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:51:49,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2021-01-06 09:51:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:49,223 INFO L225 Difference]: With dead ends: 58 [2021-01-06 09:51:49,223 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 09:51:49,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:51:49,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 09:51:49,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 09:51:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 09:51:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-01-06 09:51:49,229 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2021-01-06 09:51:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:49,230 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-01-06 09:51:49,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:51:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-01-06 09:51:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 09:51:49,231 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:49,231 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:49,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:49,445 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:49,446 INFO L82 PathProgramCache]: Analyzing trace with hash -571143464, now seen corresponding path program 7 times [2021-01-06 09:51:49,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:49,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934174906] [2021-01-06 09:51:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 09:51:49,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934174906] [2021-01-06 09:51:49,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041435329] [2021-01-06 09:51:49,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:49,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:51:49,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 09:51:49,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:49,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:51:49,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077922077] [2021-01-06 09:51:49,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:51:49,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:49,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:51:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:51:49,769 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2021-01-06 09:51:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:49,843 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-01-06 09:51:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:51:49,844 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2021-01-06 09:51:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:49,845 INFO L225 Difference]: With dead ends: 63 [2021-01-06 09:51:49,845 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 09:51:49,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:51:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 09:51:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 09:51:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 09:51:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-01-06 09:51:49,852 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-01-06 09:51:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:49,852 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-01-06 09:51:49,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:51:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-01-06 09:51:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 09:51:49,853 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:49,853 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:50,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:50,068 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:50,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1115371518, now seen corresponding path program 8 times [2021-01-06 09:51:50,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:50,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912385965] [2021-01-06 09:51:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:51:50,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912385965] [2021-01-06 09:51:50,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011042474] [2021-01-06 09:51:50,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:50,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:51:50,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:50,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:51:50,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:51:50,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:50,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:51:50,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96917556] [2021-01-06 09:51:50,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:51:50,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:50,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:51:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:51:50,367 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2021-01-06 09:51:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:50,458 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-01-06 09:51:50,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:51:50,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2021-01-06 09:51:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:50,462 INFO L225 Difference]: With dead ends: 68 [2021-01-06 09:51:50,463 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 09:51:50,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:51:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 09:51:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 09:51:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 09:51:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-01-06 09:51:50,484 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2021-01-06 09:51:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:50,484 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-01-06 09:51:50,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:51:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-01-06 09:51:50,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 09:51:50,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:50,485 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:50,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:51:50,687 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:50,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:50,688 INFO L82 PathProgramCache]: Analyzing trace with hash -953894760, now seen corresponding path program 9 times [2021-01-06 09:51:50,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:50,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140601280] [2021-01-06 09:51:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-01-06 09:51:50,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140601280] [2021-01-06 09:51:50,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893711596] [2021-01-06 09:51:50,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:51,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:51:51,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:51:51,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-01-06 09:51:51,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:51,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:51:51,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891845099] [2021-01-06 09:51:51,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:51:51,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:51,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:51:51,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:51:51,975 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2021-01-06 09:51:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:52,049 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-01-06 09:51:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:51:52,049 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2021-01-06 09:51:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:52,050 INFO L225 Difference]: With dead ends: 73 [2021-01-06 09:51:52,050 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:51:52,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:51:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:51:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 09:51:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:51:52,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-01-06 09:51:52,056 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2021-01-06 09:51:52,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:52,056 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-01-06 09:51:52,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:51:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-01-06 09:51:52,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:51:52,058 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:52,058 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:52,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:52,272 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash -468119106, now seen corresponding path program 10 times [2021-01-06 09:51:52,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:52,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755521476] [2021-01-06 09:51:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-01-06 09:51:52,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755521476] [2021-01-06 09:51:52,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594836329] [2021-01-06 09:51:52,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:52,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:51:52,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:51:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-01-06 09:51:52,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:52,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:51:52,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583236548] [2021-01-06 09:51:52,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:51:52,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:52,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:51:52,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:51:52,582 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2021-01-06 09:51:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:52,680 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-01-06 09:51:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:51:52,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2021-01-06 09:51:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:52,682 INFO L225 Difference]: With dead ends: 78 [2021-01-06 09:51:52,682 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 09:51:52,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:51:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 09:51:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 09:51:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 09:51:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-01-06 09:51:52,692 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2021-01-06 09:51:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:52,693 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-01-06 09:51:52,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:51:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-01-06 09:51:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 09:51:52,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:52,694 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:52,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:52,909 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:52,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1291774376, now seen corresponding path program 11 times [2021-01-06 09:51:52,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:52,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034659723] [2021-01-06 09:51:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-01-06 09:51:53,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034659723] [2021-01-06 09:51:53,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215238539] [2021-01-06 09:51:53,096 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 [2021-01-06 09:51:57,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 09:51:57,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:57,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:51:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-01-06 09:51:57,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:57,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:51:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245426705] [2021-01-06 09:51:57,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:51:57,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:51:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:51:57,512 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2021-01-06 09:51:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:57,612 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-01-06 09:51:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:51:57,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2021-01-06 09:51:57,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:57,613 INFO L225 Difference]: With dead ends: 83 [2021-01-06 09:51:57,613 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 09:51:57,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:51:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 09:51:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 09:51:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 09:51:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-01-06 09:51:57,629 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2021-01-06 09:51:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:57,629 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-01-06 09:51:57,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:51:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-01-06 09:51:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 09:51:57,630 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:57,630 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:57,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:51:57,831 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:57,832 INFO L82 PathProgramCache]: Analyzing trace with hash 340687742, now seen corresponding path program 12 times [2021-01-06 09:51:57,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:57,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481585633] [2021-01-06 09:51:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-01-06 09:51:58,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481585633] [2021-01-06 09:51:58,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012245183] [2021-01-06 09:51:58,062 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 [2021-01-06 09:51:59,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:51:59,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:59,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:52:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-01-06 09:52:00,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:00,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:52:00,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530521261] [2021-01-06 09:52:00,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:52:00,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:00,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:52:00,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:52:00,086 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2021-01-06 09:52:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:00,167 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-01-06 09:52:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:52:00,168 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2021-01-06 09:52:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:00,169 INFO L225 Difference]: With dead ends: 88 [2021-01-06 09:52:00,169 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 09:52:00,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:52:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 09:52:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-01-06 09:52:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 09:52:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-01-06 09:52:00,175 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2021-01-06 09:52:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:00,175 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-01-06 09:52:00,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:52:00,175 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-01-06 09:52:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 09:52:00,176 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:00,176 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:00,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:52:00,391 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1716134936, now seen corresponding path program 13 times [2021-01-06 09:52:00,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:00,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599633792] [2021-01-06 09:52:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 09:52:00,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599633792] [2021-01-06 09:52:00,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308951952] [2021-01-06 09:52:00,592 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 [2021-01-06 09:52:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:00,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:52:00,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 09:52:00,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:00,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:52:00,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50038674] [2021-01-06 09:52:00,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:52:00,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:00,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:52:00,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:52:00,756 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2021-01-06 09:52:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:00,871 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-01-06 09:52:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:52:00,871 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2021-01-06 09:52:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:00,872 INFO L225 Difference]: With dead ends: 93 [2021-01-06 09:52:00,872 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:52:00,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:52:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:52:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 09:52:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 09:52:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-01-06 09:52:00,878 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 50 [2021-01-06 09:52:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:00,878 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-01-06 09:52:00,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:52:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-01-06 09:52:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:52:00,879 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:00,879 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:01,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:52:01,095 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:01,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1136358718, now seen corresponding path program 14 times [2021-01-06 09:52:01,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:01,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656847092] [2021-01-06 09:52:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:52:01,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656847092] [2021-01-06 09:52:01,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993178245] [2021-01-06 09:52:01,299 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 [2021-01-06 09:52:01,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:52:01,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:52:01,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:01,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:52:01,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314083693] [2021-01-06 09:52:01,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:52:01,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:01,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:52:01,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:52:01,468 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 18 states. [2021-01-06 09:52:01,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:01,572 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2021-01-06 09:52:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:52:01,573 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2021-01-06 09:52:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:01,574 INFO L225 Difference]: With dead ends: 98 [2021-01-06 09:52:01,574 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 09:52:01,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:52:01,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 09:52:01,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 09:52:01,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:52:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-01-06 09:52:01,596 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2021-01-06 09:52:01,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:01,596 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-01-06 09:52:01,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:52:01,596 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-01-06 09:52:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 09:52:01,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:01,597 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:01,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:01,816 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:01,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:01,816 INFO L82 PathProgramCache]: Analyzing trace with hash 46129624, now seen corresponding path program 15 times [2021-01-06 09:52:01,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:01,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686133391] [2021-01-06 09:52:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-01-06 09:52:02,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686133391] [2021-01-06 09:52:02,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151894779] [2021-01-06 09:52:02,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 09:52:10,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:52:10,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:10,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:52:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-01-06 09:52:10,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:10,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:52:10,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368380145] [2021-01-06 09:52:10,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:52:10,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:10,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:52:10,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:52:10,245 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2021-01-06 09:52:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:10,349 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-01-06 09:52:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:52:10,349 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2021-01-06 09:52:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:10,350 INFO L225 Difference]: With dead ends: 103 [2021-01-06 09:52:10,350 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 09:52:10,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:52:10,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 09:52:10,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-01-06 09:52:10,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 09:52:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-01-06 09:52:10,355 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 56 [2021-01-06 09:52:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:10,356 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-01-06 09:52:10,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:52:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-01-06 09:52:10,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 09:52:10,357 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:10,357 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:10,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:52:10,558 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:10,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:10,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1778385154, now seen corresponding path program 16 times [2021-01-06 09:52:10,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:10,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281025438] [2021-01-06 09:52:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-01-06 09:52:10,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281025438] [2021-01-06 09:52:10,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453998519] [2021-01-06 09:52:10,812 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 [2021-01-06 09:52:10,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:10,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:10,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:52:10,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-01-06 09:52:11,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:11,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:52:11,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192050630] [2021-01-06 09:52:11,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:52:11,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:11,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:52:11,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:52:11,053 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 20 states. [2021-01-06 09:52:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:11,165 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-01-06 09:52:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:52:11,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2021-01-06 09:52:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:11,166 INFO L225 Difference]: With dead ends: 108 [2021-01-06 09:52:11,167 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 09:52:11,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:52:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 09:52:11,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-01-06 09:52:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 09:52:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-01-06 09:52:11,172 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2021-01-06 09:52:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:11,172 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-01-06 09:52:11,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:52:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-01-06 09:52:11,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 09:52:11,173 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:11,173 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:11,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:52:11,387 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash 119689112, now seen corresponding path program 17 times [2021-01-06 09:52:11,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:11,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310413173] [2021-01-06 09:52:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-01-06 09:52:11,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310413173] [2021-01-06 09:52:11,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404010219] [2021-01-06 09:52:11,667 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