/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-lopstr16/flag_loopdep_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:11:53,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:11:53,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:11:53,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:11:53,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:11:53,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:11:53,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:11:53,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:11:53,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:11:53,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:11:53,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:11:53,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:11:53,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:11:53,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:11:53,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:11:53,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:11:53,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:11:53,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:11:53,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:11:53,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:11:53,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:11:53,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:11:53,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:11:53,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:11:53,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:11:53,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:11:53,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:11:53,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:11:53,609 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:11:53,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:11:53,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:11:53,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:11:53,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:11:53,675 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:11:53,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:11:53,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:11:53,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:11:53,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:11:53,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:11:53,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:11:53,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:11:53,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:11:53,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:11:53,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:11:53,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:11:53,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:11:53,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:11:53,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:11:53,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:11:53,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:11:53,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:11:53,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:11:53,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:11:53,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:11:53,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:11:54,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:11:54,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:11:54,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:11:54,162 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:11:54,163 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:11:54,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2020-12-23 01:11:54,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/61bc8f7e2/6f1ee95e8b554a37a4d9bcbac27eeb5b/FLAG966312bd4 [2020-12-23 01:11:55,006 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:11:55,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2020-12-23 01:11:55,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/61bc8f7e2/6f1ee95e8b554a37a4d9bcbac27eeb5b/FLAG966312bd4 [2020-12-23 01:11:55,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/61bc8f7e2/6f1ee95e8b554a37a4d9bcbac27eeb5b [2020-12-23 01:11:55,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:11:55,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:11:55,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:11:55,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:11:55,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:11:55,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10ce3196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55, skipping insertion in model container [2020-12-23 01:11:55,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:11:55,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:11:55,536 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-lopstr16/flag_loopdep_simple.i[812,825] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2020-12-23 01:11:55,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:11:55,573 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:11:55,588 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-lopstr16/flag_loopdep_simple.i[812,825] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2020-12-23 01:11:55,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:11:55,615 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:11:55,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55 WrapperNode [2020-12-23 01:11:55,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:11:55,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:11:55,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:11:55,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:11:55,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:11:55,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:11:55,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:11:55,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:11:55,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (1/1) ... [2020-12-23 01:11:55,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:11:55,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:11:55,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:11:55,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:11:55,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:11:55,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:11:55,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:11:55,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:11:55,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:11:55,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:11:55,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:11:55,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:11:56,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:11:56,172 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 01:11:56,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:11:56 BoogieIcfgContainer [2020-12-23 01:11:56,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:11:56,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:11:56,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:11:56,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:11:56,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:11:55" (1/3) ... [2020-12-23 01:11:56,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b40c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:11:56, skipping insertion in model container [2020-12-23 01:11:56,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:11:55" (2/3) ... [2020-12-23 01:11:56,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b40c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:11:56, skipping insertion in model container [2020-12-23 01:11:56,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:11:56" (3/3) ... [2020-12-23 01:11:56,188 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2020-12-23 01:11:56,198 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:11:56,211 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:11:56,271 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:11:56,351 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:11:56,352 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:11:56,352 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:11:56,352 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:11:56,352 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:11:56,352 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:11:56,372 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:11:56,372 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:11:56,404 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 01:11:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 01:11:56,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:56,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:56,416 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:56,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2020-12-23 01:11:56,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:56,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631202762] [2020-12-23 01:11:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:56,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631202762] [2020-12-23 01:11:56,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:11:56,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:11:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326978915] [2020-12-23 01:11:56,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:11:56,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:11:56,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:11:56,739 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 01:11:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:56,771 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2020-12-23 01:11:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:11:56,773 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 01:11:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:56,799 INFO L225 Difference]: With dead ends: 36 [2020-12-23 01:11:56,800 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 01:11:56,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:11:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 01:11:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 01:11:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 01:11:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-23 01:11:56,851 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2020-12-23 01:11:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:56,852 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-23 01:11:56,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:11:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-23 01:11:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 01:11:56,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:56,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:56,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:11:56,856 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:56,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2020-12-23 01:11:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:56,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891137147] [2020-12-23 01:11:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:57,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891137147] [2020-12-23 01:11:57,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:11:57,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:11:57,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320495650] [2020-12-23 01:11:57,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:11:57,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:57,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:11:57,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:11:57,058 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2020-12-23 01:11:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:57,088 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-12-23 01:11:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:11:57,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 01:11:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:57,091 INFO L225 Difference]: With dead ends: 30 [2020-12-23 01:11:57,091 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 01:11:57,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:11:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 01:11:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 01:11:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 01:11:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-23 01:11:57,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2020-12-23 01:11:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:57,098 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-23 01:11:57,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:11:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-23 01:11:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 01:11:57,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:57,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:57,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:11:57,100 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1264138591, now seen corresponding path program 1 times [2020-12-23 01:11:57,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:57,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134283002] [2020-12-23 01:11:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:11:57,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134283002] [2020-12-23 01:11:57,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:11:57,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:11:57,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694324021] [2020-12-23 01:11:57,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:11:57,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:57,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:11:57,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:11:57,156 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2020-12-23 01:11:57,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:57,225 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-12-23 01:11:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:11:57,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 01:11:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:57,228 INFO L225 Difference]: With dead ends: 35 [2020-12-23 01:11:57,228 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 01:11:57,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:11:57,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 01:11:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2020-12-23 01:11:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 01:11:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-23 01:11:57,234 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-12-23 01:11:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:57,235 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-23 01:11:57,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:11:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-23 01:11:57,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 01:11:57,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:57,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:57,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 01:11:57,236 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:57,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2020-12-23 01:11:57,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:57,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386175000] [2020-12-23 01:11:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:11:57,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386175000] [2020-12-23 01:11:57,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116340042] [2020-12-23 01:11:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 01:11:57,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:11:57,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:11:57,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 01:11:57,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986317532] [2020-12-23 01:11:57,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:11:57,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:57,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:11:57,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:11:57,528 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 3 states. [2020-12-23 01:11:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:57,552 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-12-23 01:11:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:11:57,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-12-23 01:11:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:57,555 INFO L225 Difference]: With dead ends: 32 [2020-12-23 01:11:57,555 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 01:11:57,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:11:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 01:11:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 01:11:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 01:11:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-23 01:11:57,560 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2020-12-23 01:11:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:57,560 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-23 01:11:57,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:11:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-23 01:11:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 01:11:57,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:57,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:57,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:57,777 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:57,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2027280351, now seen corresponding path program 1 times [2020-12-23 01:11:57,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:57,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886810702] [2020-12-23 01:11:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:11:57,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886810702] [2020-12-23 01:11:57,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834866162] [2020-12-23 01:11:57,828 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:11:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:11:57,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:57,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 01:11:57,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614008783] [2020-12-23 01:11:57,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:11:57,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:57,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:11:57,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:11:57,982 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-12-23 01:11:58,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:58,041 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-12-23 01:11:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:11:58,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 01:11:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:58,043 INFO L225 Difference]: With dead ends: 53 [2020-12-23 01:11:58,043 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 01:11:58,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:11:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 01:11:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2020-12-23 01:11:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 01:11:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-23 01:11:58,050 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2020-12-23 01:11:58,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:58,050 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-23 01:11:58,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:11:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-23 01:11:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 01:11:58,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:58,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:58,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:58,268 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:58,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2139127327, now seen corresponding path program 2 times [2020-12-23 01:11:58,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:58,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735219474] [2020-12-23 01:11:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 01:11:58,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735219474] [2020-12-23 01:11:58,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604083600] [2020-12-23 01:11:58,408 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:58,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:11:58,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:11:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 01:11:58,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:58,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 01:11:58,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695413666] [2020-12-23 01:11:58,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:11:58,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:58,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:11:58,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:11:58,588 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 8 states. [2020-12-23 01:11:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:58,616 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-12-23 01:11:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:11:58,616 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-23 01:11:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:58,617 INFO L225 Difference]: With dead ends: 42 [2020-12-23 01:11:58,617 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 01:11:58,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:11:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 01:11:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-23 01:11:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 01:11:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 01:11:58,623 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-12-23 01:11:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:58,624 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 01:11:58,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:11:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 01:11:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 01:11:58,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:58,625 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:58,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:58,839 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:58,840 INFO L82 PathProgramCache]: Analyzing trace with hash -331071005, now seen corresponding path program 3 times [2020-12-23 01:11:58,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:58,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788974860] [2020-12-23 01:11:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 01:11:58,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788974860] [2020-12-23 01:11:58,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3759904] [2020-12-23 01:11:58,918 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:58,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 01:11:58,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:58,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:11:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 01:11:59,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:59,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-23 01:11:59,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710615785] [2020-12-23 01:11:59,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:11:59,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:59,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:11:59,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:11:59,035 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2020-12-23 01:11:59,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:59,101 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-12-23 01:11:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:11:59,101 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 01:11:59,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:59,102 INFO L225 Difference]: With dead ends: 70 [2020-12-23 01:11:59,102 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 01:11:59,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:11:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 01:11:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2020-12-23 01:11:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 01:11:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-23 01:11:59,109 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-12-23 01:11:59,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:59,110 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-23 01:11:59,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:11:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-23 01:11:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 01:11:59,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:59,111 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:59,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:59,325 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1534672359, now seen corresponding path program 4 times [2020-12-23 01:11:59,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:59,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071263242] [2020-12-23 01:11:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 01:11:59,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071263242] [2020-12-23 01:11:59,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050076827] [2020-12-23 01:11:59,469 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:59,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:11:59,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:59,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:11:59,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 01:11:59,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:59,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 01:11:59,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290718227] [2020-12-23 01:11:59,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:11:59,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:59,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:11:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:11:59,597 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 11 states. [2020-12-23 01:11:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:59,690 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-12-23 01:11:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:11:59,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-12-23 01:11:59,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:59,692 INFO L225 Difference]: With dead ends: 85 [2020-12-23 01:11:59,692 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 01:11:59,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:11:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 01:11:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 35. [2020-12-23 01:11:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 01:11:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-12-23 01:11:59,699 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 27 [2020-12-23 01:11:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:59,699 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-12-23 01:11:59,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:11:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-12-23 01:11:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 01:11:59,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:59,700 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:59,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:59,908 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:59,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:59,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1766720103, now seen corresponding path program 5 times [2020-12-23 01:11:59,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:59,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422168600] [2020-12-23 01:11:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 01:12:00,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422168600] [2020-12-23 01:12:00,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723305362] [2020-12-23 01:12:00,051 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:00,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:12:00,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:00,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:12:00,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 01:12:00,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:00,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-23 01:12:00,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036603520] [2020-12-23 01:12:00,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:12:00,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:00,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:12:00,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:12:00,228 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 13 states. [2020-12-23 01:12:00,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:00,374 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-12-23 01:12:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:12:00,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-12-23 01:12:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:00,376 INFO L225 Difference]: With dead ends: 100 [2020-12-23 01:12:00,376 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 01:12:00,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:12:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 01:12:00,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 40. [2020-12-23 01:12:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 01:12:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-23 01:12:00,382 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2020-12-23 01:12:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:00,383 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-23 01:12:00,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:12:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-23 01:12:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 01:12:00,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:00,384 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:00,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:00,599 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:00,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1089794667, now seen corresponding path program 6 times [2020-12-23 01:12:00,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:00,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976804745] [2020-12-23 01:12:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 01:12:00,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976804745] [2020-12-23 01:12:00,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776929267] [2020-12-23 01:12:00,738 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:00,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 01:12:00,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:12:00,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-23 01:12:00,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:00,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-23 01:12:00,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192661299] [2020-12-23 01:12:00,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:12:00,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:01,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:12:01,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:12:01,005 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 15 states. [2020-12-23 01:12:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:01,331 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-12-23 01:12:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:12:01,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-12-23 01:12:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:01,333 INFO L225 Difference]: With dead ends: 77 [2020-12-23 01:12:01,333 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 01:12:01,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:12:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 01:12:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-12-23 01:12:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 01:12:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-23 01:12:01,340 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 37 [2020-12-23 01:12:01,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:01,341 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-23 01:12:01,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:12:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-23 01:12:01,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 01:12:01,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:01,342 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:01,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 01:12:01,557 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:01,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1351978204, now seen corresponding path program 1 times [2020-12-23 01:12:01,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:01,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230759558] [2020-12-23 01:12:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-23 01:12:01,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230759558] [2020-12-23 01:12:01,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:12:01,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:12:01,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718574365] [2020-12-23 01:12:01,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:12:01,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:01,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:12:01,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:12:01,611 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 3 states. [2020-12-23 01:12:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:01,616 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-23 01:12:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:12:01,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-23 01:12:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:01,617 INFO L225 Difference]: With dead ends: 52 [2020-12-23 01:12:01,617 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 01:12:01,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:12:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 01:12:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 01:12:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 01:12:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-23 01:12:01,624 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-12-23 01:12:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:01,624 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-23 01:12:01,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:12:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-23 01:12:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 01:12:01,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:01,626 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:01,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 01:12:01,626 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:01,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:01,627 INFO L82 PathProgramCache]: Analyzing trace with hash 2040020590, now seen corresponding path program 1 times [2020-12-23 01:12:01,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:01,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391543080] [2020-12-23 01:12:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 01:12:01,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391543080] [2020-12-23 01:12:01,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258896423] [2020-12-23 01:12:01,767 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:12:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 01:12:02,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:02,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-23 01:12:02,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888298560] [2020-12-23 01:12:02,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:12:02,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:02,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:12:02,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:12:02,127 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2020-12-23 01:12:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:02,175 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-12-23 01:12:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:12:02,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-12-23 01:12:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:02,177 INFO L225 Difference]: With dead ends: 76 [2020-12-23 01:12:02,177 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 01:12:02,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:12:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 01:12:02,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-23 01:12:02,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 01:12:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-23 01:12:02,183 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-12-23 01:12:02,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:02,184 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-23 01:12:02,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:12:02,184 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-23 01:12:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 01:12:02,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:02,185 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:02,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 01:12:02,399 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:02,400 INFO L82 PathProgramCache]: Analyzing trace with hash 461215856, now seen corresponding path program 2 times [2020-12-23 01:12:02,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:02,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096328695] [2020-12-23 01:12:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 01:12:02,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096328695] [2020-12-23 01:12:02,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246821768] [2020-12-23 01:12:02,601 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:02,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:12:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 01:12:02,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:02,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-23 01:12:02,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288085662] [2020-12-23 01:12:02,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:12:02,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:12:02,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:12:02,945 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 20 states. [2020-12-23 01:12:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:02,992 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-12-23 01:12:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:12:02,992 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-12-23 01:12:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:02,993 INFO L225 Difference]: With dead ends: 78 [2020-12-23 01:12:02,993 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 01:12:02,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:12:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 01:12:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-23 01:12:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 01:12:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-12-23 01:12:03,002 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-12-23 01:12:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:03,002 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-12-23 01:12:03,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:12:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-12-23 01:12:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 01:12:03,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:03,004 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:03,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:03,220 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash -646678030, now seen corresponding path program 3 times [2020-12-23 01:12:03,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:03,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326739215] [2020-12-23 01:12:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 01:12:03,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326739215] [2020-12-23 01:12:03,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121527928] [2020-12-23 01:12:03,457 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:03,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 01:12:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:03,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:12:03,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-23 01:12:03,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:03,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-23 01:12:03,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951120854] [2020-12-23 01:12:03,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:12:03,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:12:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:12:03,688 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 18 states. [2020-12-23 01:12:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:03,809 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2020-12-23 01:12:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:12:03,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-12-23 01:12:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:03,811 INFO L225 Difference]: With dead ends: 122 [2020-12-23 01:12:03,811 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 01:12:03,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:12:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 01:12:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2020-12-23 01:12:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 01:12:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-23 01:12:03,819 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2020-12-23 01:12:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:03,819 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-23 01:12:03,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:12:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-23 01:12:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 01:12:03,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:03,820 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:04,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:04,035 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:04,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1330435568, now seen corresponding path program 4 times [2020-12-23 01:12:04,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:04,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133527315] [2020-12-23 01:12:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 01:12:04,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133527315] [2020-12-23 01:12:04,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606795554] [2020-12-23 01:12:04,219 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:04,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:04,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:04,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:12:04,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-23 01:12:04,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:04,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-12-23 01:12:04,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853288048] [2020-12-23 01:12:04,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:12:04,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:04,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:12:04,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:12:04,472 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 20 states. [2020-12-23 01:12:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:04,639 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2020-12-23 01:12:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 01:12:04,640 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-12-23 01:12:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:04,640 INFO L225 Difference]: With dead ends: 137 [2020-12-23 01:12:04,641 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 01:12:04,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:12:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 01:12:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 59. [2020-12-23 01:12:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 01:12:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-12-23 01:12:04,649 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2020-12-23 01:12:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:04,649 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-12-23 01:12:04,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:12:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-12-23 01:12:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 01:12:04,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:04,651 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:04,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 01:12:04,864 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:04,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2088027254, now seen corresponding path program 5 times [2020-12-23 01:12:04,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:04,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804801128] [2020-12-23 01:12:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 01:12:05,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804801128] [2020-12-23 01:12:05,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080215389] [2020-12-23 01:12:05,148 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:05,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 01:12:05,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:12:05,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 01:12:05,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:05,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2020-12-23 01:12:05,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066728274] [2020-12-23 01:12:05,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:12:05,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:12:05,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:12:05,528 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 22 states. [2020-12-23 01:12:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:05,739 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2020-12-23 01:12:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:12:05,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-12-23 01:12:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:05,742 INFO L225 Difference]: With dead ends: 152 [2020-12-23 01:12:05,742 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 01:12:05,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:12:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 01:12:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 64. [2020-12-23 01:12:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 01:12:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-23 01:12:05,769 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 58 [2020-12-23 01:12:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:05,769 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-23 01:12:05,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:12:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-23 01:12:05,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 01:12:05,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:05,771 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:05,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:12:05,975 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:05,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1964209268, now seen corresponding path program 6 times [2020-12-23 01:12:05,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:05,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201049601] [2020-12-23 01:12:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 01:12:06,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201049601] [2020-12-23 01:12:06,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415270944] [2020-12-23 01:12:06,223 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:06,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 01:12:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 01:12:06,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2020-12-23 01:12:06,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:06,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2020-12-23 01:12:06,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306930048] [2020-12-23 01:12:06,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 01:12:06,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 01:12:06,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:12:06,868 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 26 states. [2020-12-23 01:12:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:07,511 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-12-23 01:12:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 01:12:07,523 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-12-23 01:12:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:07,525 INFO L225 Difference]: With dead ends: 113 [2020-12-23 01:12:07,525 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 01:12:07,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=375, Invalid=1347, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 01:12:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 01:12:07,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-12-23 01:12:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 01:12:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-12-23 01:12:07,555 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2020-12-23 01:12:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:07,555 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-12-23 01:12:07,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 01:12:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-12-23 01:12:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 01:12:07,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:07,559 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:07,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:12:07,774 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:07,775 INFO L82 PathProgramCache]: Analyzing trace with hash 601482327, now seen corresponding path program 7 times [2020-12-23 01:12:07,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:07,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160234212] [2020-12-23 01:12:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-23 01:12:08,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160234212] [2020-12-23 01:12:08,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896881317] [2020-12-23 01:12:08,087 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:08,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:12:08,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-23 01:12:08,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:08,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 01:12:08,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596654292] [2020-12-23 01:12:08,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 01:12:08,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 01:12:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-23 01:12:08,655 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2020-12-23 01:12:08,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:08,720 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-12-23 01:12:08,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:12:08,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-12-23 01:12:08,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:08,721 INFO L225 Difference]: With dead ends: 116 [2020-12-23 01:12:08,721 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 01:12:08,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-23 01:12:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 01:12:08,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-23 01:12:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 01:12:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-12-23 01:12:08,728 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2020-12-23 01:12:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:08,728 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-12-23 01:12:08,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 01:12:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-12-23 01:12:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 01:12:08,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:08,730 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:08,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:08,943 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:08,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1946476505, now seen corresponding path program 8 times [2020-12-23 01:12:08,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:08,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886698329] [2020-12-23 01:12:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-23 01:12:09,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886698329] [2020-12-23 01:12:09,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48440979] [2020-12-23 01:12:09,244 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:09,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:09,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:12:09,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-23 01:12:09,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:09,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-23 01:12:09,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605902528] [2020-12-23 01:12:09,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 01:12:09,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:09,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 01:12:09,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:12:09,923 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 32 states. [2020-12-23 01:12:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:10,002 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-12-23 01:12:10,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:12:10,003 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-12-23 01:12:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:10,006 INFO L225 Difference]: With dead ends: 118 [2020-12-23 01:12:10,006 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 01:12:10,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:12:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 01:12:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-23 01:12:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 01:12:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-12-23 01:12:10,018 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2020-12-23 01:12:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:10,018 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-12-23 01:12:10,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 01:12:10,019 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-12-23 01:12:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 01:12:10,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:10,026 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:10,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:10,242 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:10,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1700725467, now seen corresponding path program 9 times [2020-12-23 01:12:10,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:10,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629452485] [2020-12-23 01:12:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-23 01:12:10,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629452485] [2020-12-23 01:12:10,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737735687] [2020-12-23 01:12:10,552 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:10,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 01:12:10,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:10,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:12:10,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-12-23 01:12:10,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:10,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2020-12-23 01:12:10,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979647194] [2020-12-23 01:12:10,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 01:12:10,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:10,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 01:12:10,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:12:10,913 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 27 states. [2020-12-23 01:12:11,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:11,150 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2020-12-23 01:12:11,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 01:12:11,151 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2020-12-23 01:12:11,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:11,152 INFO L225 Difference]: With dead ends: 176 [2020-12-23 01:12:11,152 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 01:12:11,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:12:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 01:12:11,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 80. [2020-12-23 01:12:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 01:12:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-23 01:12:11,158 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 74 [2020-12-23 01:12:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:11,159 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-23 01:12:11,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 01:12:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-23 01:12:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 01:12:11,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:11,160 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 9, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:11,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:11,370 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:11,371 INFO L82 PathProgramCache]: Analyzing trace with hash 605502177, now seen corresponding path program 10 times [2020-12-23 01:12:11,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:11,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108271548] [2020-12-23 01:12:11,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 01:12:11,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108271548] [2020-12-23 01:12:11,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868469427] [2020-12-23 01:12:11,692 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:11,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:11,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:11,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:12:11,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-12-23 01:12:12,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:12,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2020-12-23 01:12:12,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362542882] [2020-12-23 01:12:12,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 01:12:12,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:12,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 01:12:12,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:12:12,079 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 29 states. [2020-12-23 01:12:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:12,327 INFO L93 Difference]: Finished difference Result 191 states and 196 transitions. [2020-12-23 01:12:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 01:12:12,329 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-12-23 01:12:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:12,330 INFO L225 Difference]: With dead ends: 191 [2020-12-23 01:12:12,330 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 01:12:12,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:12:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 01:12:12,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 85. [2020-12-23 01:12:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 01:12:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-12-23 01:12:12,338 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2020-12-23 01:12:12,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:12,339 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-12-23 01:12:12,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 01:12:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-12-23 01:12:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 01:12:12,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:12,340 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:12,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 01:12:12,551 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:12,552 INFO L82 PathProgramCache]: Analyzing trace with hash -956491937, now seen corresponding path program 11 times [2020-12-23 01:12:12,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:12,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638394935] [2020-12-23 01:12:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-23 01:12:12,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638394935] [2020-12-23 01:12:12,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804605054] [2020-12-23 01:12:12,968 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:13,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 01:12:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:13,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:12:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-23 01:12:13,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:13,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 31 [2020-12-23 01:12:13,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079638126] [2020-12-23 01:12:13,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:12:13,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:13,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:12:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:12:13,789 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 31 states. [2020-12-23 01:12:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:14,088 INFO L93 Difference]: Finished difference Result 206 states and 211 transitions. [2020-12-23 01:12:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 01:12:14,091 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 84 [2020-12-23 01:12:14,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:14,092 INFO L225 Difference]: With dead ends: 206 [2020-12-23 01:12:14,093 INFO L226 Difference]: Without dead ends: 158 [2020-12-23 01:12:14,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:12:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-23 01:12:14,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-12-23 01:12:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 01:12:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-23 01:12:14,100 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 84 [2020-12-23 01:12:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:14,100 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-23 01:12:14,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:12:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-23 01:12:14,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 01:12:14,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:14,101 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 11, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:14,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 01:12:14,311 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash 251556445, now seen corresponding path program 12 times [2020-12-23 01:12:14,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:14,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287263484] [2020-12-23 01:12:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 01:12:14,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287263484] [2020-12-23 01:12:14,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951617676] [2020-12-23 01:12:14,854 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:15,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 01:12:15,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:15,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 01:12:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-12-23 01:12:15,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:15,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2020-12-23 01:12:15,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343437984] [2020-12-23 01:12:15,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 01:12:15,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:15,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 01:12:15,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:12:15,738 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 32 states. [2020-12-23 01:12:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:16,352 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2020-12-23 01:12:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 01:12:16,353 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2020-12-23 01:12:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:16,353 INFO L225 Difference]: With dead ends: 153 [2020-12-23 01:12:16,354 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 01:12:16,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:12:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 01:12:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2020-12-23 01:12:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 01:12:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-12-23 01:12:16,362 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 89 [2020-12-23 01:12:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:16,362 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-12-23 01:12:16,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 01:12:16,362 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-12-23 01:12:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 01:12:16,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:16,364 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:16,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 01:12:16,579 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:16,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:16,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1233500582, now seen corresponding path program 13 times [2020-12-23 01:12:16,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:16,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899107622] [2020-12-23 01:12:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-23 01:12:16,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899107622] [2020-12-23 01:12:16,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696375826] [2020-12-23 01:12:16,989 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:17,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 01:12:17,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-23 01:12:17,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:17,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2020-12-23 01:12:17,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598200299] [2020-12-23 01:12:17,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 01:12:17,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:17,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 01:12:17,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 01:12:17,981 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 42 states. [2020-12-23 01:12:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:18,081 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2020-12-23 01:12:18,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:12:18,082 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 96 [2020-12-23 01:12:18,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:18,083 INFO L225 Difference]: With dead ends: 156 [2020-12-23 01:12:18,083 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 01:12:18,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 01:12:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 01:12:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-23 01:12:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 01:12:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-12-23 01:12:18,091 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2020-12-23 01:12:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:18,091 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-12-23 01:12:18,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 01:12:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-12-23 01:12:18,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 01:12:18,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:18,093 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:18,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 01:12:18,308 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:18,309 INFO L82 PathProgramCache]: Analyzing trace with hash -272140632, now seen corresponding path program 14 times [2020-12-23 01:12:18,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:18,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667470528] [2020-12-23 01:12:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-23 01:12:18,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667470528] [2020-12-23 01:12:18,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489431125] [2020-12-23 01:12:18,819 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:18,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:18,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:18,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:12:18,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-23 01:12:19,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:19,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-12-23 01:12:19,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469699468] [2020-12-23 01:12:19,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 01:12:19,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:19,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 01:12:19,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:12:19,921 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2020-12-23 01:12:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:20,041 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-12-23 01:12:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 01:12:20,042 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2020-12-23 01:12:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:20,043 INFO L225 Difference]: With dead ends: 158 [2020-12-23 01:12:20,043 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 01:12:20,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:12:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 01:12:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-23 01:12:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 01:12:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-12-23 01:12:20,050 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2020-12-23 01:12:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:20,050 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-12-23 01:12:20,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 01:12:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-12-23 01:12:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 01:12:20,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:20,052 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:20,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 01:12:20,266 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:20,267 INFO L82 PathProgramCache]: Analyzing trace with hash 210631466, now seen corresponding path program 15 times [2020-12-23 01:12:20,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:20,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940617972] [2020-12-23 01:12:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-23 01:12:20,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940617972] [2020-12-23 01:12:20,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062741487] [2020-12-23 01:12:20,816 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:20,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 01:12:20,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:20,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 01:12:20,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-12-23 01:12:21,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:21,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2020-12-23 01:12:21,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060473365] [2020-12-23 01:12:21,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 01:12:21,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:21,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 01:12:21,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:12:21,372 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 36 states. [2020-12-23 01:12:21,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:21,666 INFO L93 Difference]: Finished difference Result 230 states and 235 transitions. [2020-12-23 01:12:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 01:12:21,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2020-12-23 01:12:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:21,668 INFO L225 Difference]: With dead ends: 230 [2020-12-23 01:12:21,668 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 01:12:21,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:12:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 01:12:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 106. [2020-12-23 01:12:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 01:12:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-23 01:12:21,676 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 100 [2020-12-23 01:12:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:21,677 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-23 01:12:21,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 01:12:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-23 01:12:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-23 01:12:21,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:21,678 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 12, 12, 12, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:21,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:21,887 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:21,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1180537624, now seen corresponding path program 16 times [2020-12-23 01:12:21,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:21,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107017207] [2020-12-23 01:12:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 01:12:22,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107017207] [2020-12-23 01:12:22,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022107532] [2020-12-23 01:12:22,412 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:22,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:22,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:22,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:12:22,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-12-23 01:12:22,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:22,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2020-12-23 01:12:22,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974296520] [2020-12-23 01:12:22,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 01:12:22,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:22,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 01:12:22,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 01:12:22,984 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 38 states. [2020-12-23 01:12:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:23,339 INFO L93 Difference]: Finished difference Result 245 states and 250 transitions. [2020-12-23 01:12:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 01:12:23,340 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 105 [2020-12-23 01:12:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:23,341 INFO L225 Difference]: With dead ends: 245 [2020-12-23 01:12:23,341 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 01:12:23,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 01:12:23,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 01:12:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 111. [2020-12-23 01:12:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 01:12:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-12-23 01:12:23,355 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 105 [2020-12-23 01:12:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:23,355 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-12-23 01:12:23,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 01:12:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-12-23 01:12:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 01:12:23,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:23,357 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 13, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:23,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 01:12:23,571 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:23,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1538188882, now seen corresponding path program 17 times [2020-12-23 01:12:23,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:23,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779726854] [2020-12-23 01:12:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2020-12-23 01:12:24,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779726854] [2020-12-23 01:12:24,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700208039] [2020-12-23 01:12:24,153 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:24,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 01:12:24,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:24,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:12:24,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-23 01:12:25,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:25,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 40 [2020-12-23 01:12:25,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265636155] [2020-12-23 01:12:25,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 01:12:25,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:25,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 01:12:25,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:12:25,340 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 40 states. [2020-12-23 01:12:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:25,620 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2020-12-23 01:12:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 01:12:25,621 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 110 [2020-12-23 01:12:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:25,622 INFO L225 Difference]: With dead ends: 260 [2020-12-23 01:12:25,622 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 01:12:25,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:12:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 01:12:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 116. [2020-12-23 01:12:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 01:12:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-12-23 01:12:25,630 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 110 [2020-12-23 01:12:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:25,630 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-12-23 01:12:25,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 01:12:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-12-23 01:12:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 01:12:25,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:25,632 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 14, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:25,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:25,846 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:25,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1240768364, now seen corresponding path program 18 times [2020-12-23 01:12:25,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:25,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167390197] [2020-12-23 01:12:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2020-12-23 01:12:26,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167390197] [2020-12-23 01:12:26,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563438684] [2020-12-23 01:12:26,434 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:27,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 01:12:27,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 01:12:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-12-23 01:12:28,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:28,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2020-12-23 01:12:28,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465381374] [2020-12-23 01:12:28,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 01:12:28,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:28,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 01:12:28,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1098, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 01:12:28,450 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 39 states. [2020-12-23 01:12:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:29,304 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2020-12-23 01:12:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 01:12:29,305 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-12-23 01:12:29,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:29,305 INFO L225 Difference]: With dead ends: 193 [2020-12-23 01:12:29,305 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 01:12:29,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=1323, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 01:12:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 01:12:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2020-12-23 01:12:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 01:12:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-12-23 01:12:29,316 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 115 [2020-12-23 01:12:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:29,317 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-12-23 01:12:29,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 01:12:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-12-23 01:12:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 01:12:29,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:29,318 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:29,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 01:12:29,533 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:29,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:29,534 INFO L82 PathProgramCache]: Analyzing trace with hash 528635727, now seen corresponding path program 19 times [2020-12-23 01:12:29,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:29,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230345560] [2020-12-23 01:12:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-23 01:12:30,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230345560] [2020-12-23 01:12:30,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760340443] [2020-12-23 01:12:30,224 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:30,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 01:12:30,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-23 01:12:31,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:31,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2020-12-23 01:12:31,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478142959] [2020-12-23 01:12:31,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 01:12:31,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:31,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 01:12:31,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 01:12:31,859 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 54 states. [2020-12-23 01:12:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:31,984 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2020-12-23 01:12:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 01:12:31,985 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 122 [2020-12-23 01:12:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:31,986 INFO L225 Difference]: With dead ends: 196 [2020-12-23 01:12:31,986 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 01:12:31,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 01:12:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 01:12:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-12-23 01:12:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 01:12:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-12-23 01:12:31,997 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2020-12-23 01:12:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:31,997 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-12-23 01:12:31,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 01:12:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-12-23 01:12:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 01:12:31,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:31,999 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:32,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:32,206 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash -763103791, now seen corresponding path program 20 times [2020-12-23 01:12:32,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:32,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924300880] [2020-12-23 01:12:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-23 01:12:32,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924300880] [2020-12-23 01:12:32,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116353131] [2020-12-23 01:12:32,964 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:33,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:33,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:33,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 01:12:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-23 01:12:34,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:34,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2020-12-23 01:12:34,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211351441] [2020-12-23 01:12:34,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 01:12:34,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:34,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 01:12:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 01:12:34,795 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 56 states. [2020-12-23 01:12:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:34,975 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2020-12-23 01:12:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 01:12:34,976 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 124 [2020-12-23 01:12:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:34,977 INFO L225 Difference]: With dead ends: 198 [2020-12-23 01:12:34,978 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 01:12:34,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 01:12:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 01:12:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-23 01:12:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 01:12:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-12-23 01:12:34,986 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2020-12-23 01:12:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:34,987 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-12-23 01:12:34,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 01:12:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-12-23 01:12:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 01:12:34,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:34,988 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:35,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 01:12:35,203 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:35,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:35,204 INFO L82 PathProgramCache]: Analyzing trace with hash -879232045, now seen corresponding path program 21 times [2020-12-23 01:12:35,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:35,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892429394] [2020-12-23 01:12:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-23 01:12:35,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892429394] [2020-12-23 01:12:35,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624349011] [2020-12-23 01:12:35,977 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:36,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 01:12:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:36,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:12:36,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2020-12-23 01:12:36,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:36,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17] total 45 [2020-12-23 01:12:36,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770455130] [2020-12-23 01:12:36,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 01:12:36,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:36,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 01:12:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 01:12:36,843 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 45 states. [2020-12-23 01:12:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:37,200 INFO L93 Difference]: Finished difference Result 284 states and 289 transitions. [2020-12-23 01:12:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 01:12:37,201 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 126 [2020-12-23 01:12:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:37,202 INFO L225 Difference]: With dead ends: 284 [2020-12-23 01:12:37,203 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 01:12:37,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 01:12:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 01:12:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 132. [2020-12-23 01:12:37,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 01:12:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-12-23 01:12:37,213 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 126 [2020-12-23 01:12:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:37,213 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-12-23 01:12:37,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 01:12:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-12-23 01:12:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 01:12:37,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:37,214 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 15, 15, 15, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:37,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:37,422 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:37,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:37,423 INFO L82 PathProgramCache]: Analyzing trace with hash -935507031, now seen corresponding path program 22 times [2020-12-23 01:12:37,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:37,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080233776] [2020-12-23 01:12:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2020-12-23 01:12:38,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080233776] [2020-12-23 01:12:38,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487169402] [2020-12-23 01:12:38,217 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:38,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:38,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:38,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:12:38,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-12-23 01:12:39,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:39,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2020-12-23 01:12:39,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111916385] [2020-12-23 01:12:39,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 01:12:39,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:39,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 01:12:39,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 01:12:39,017 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 47 states. [2020-12-23 01:12:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:39,433 INFO L93 Difference]: Finished difference Result 299 states and 304 transitions. [2020-12-23 01:12:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 01:12:39,433 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 131 [2020-12-23 01:12:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:39,435 INFO L225 Difference]: With dead ends: 299 [2020-12-23 01:12:39,435 INFO L226 Difference]: Without dead ends: 226 [2020-12-23 01:12:39,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 01:12:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-23 01:12:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 137. [2020-12-23 01:12:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 01:12:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2020-12-23 01:12:39,445 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2020-12-23 01:12:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:39,445 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2020-12-23 01:12:39,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 01:12:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2020-12-23 01:12:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 01:12:39,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:39,446 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 16, 16, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:39,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 01:12:39,660 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:39,660 INFO L82 PathProgramCache]: Analyzing trace with hash -739810217, now seen corresponding path program 23 times [2020-12-23 01:12:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:39,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185960773] [2020-12-23 01:12:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2020-12-23 01:12:40,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185960773] [2020-12-23 01:12:40,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660284915] [2020-12-23 01:12:40,441 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:41,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 01:12:41,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:41,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:12:41,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2020-12-23 01:12:42,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:42,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19] total 49 [2020-12-23 01:12:42,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619252155] [2020-12-23 01:12:42,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 01:12:42,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:42,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 01:12:42,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 01:12:42,107 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 49 states. [2020-12-23 01:12:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:42,462 INFO L93 Difference]: Finished difference Result 314 states and 319 transitions. [2020-12-23 01:12:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 01:12:42,463 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 136 [2020-12-23 01:12:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:42,464 INFO L225 Difference]: With dead ends: 314 [2020-12-23 01:12:42,465 INFO L226 Difference]: Without dead ends: 238 [2020-12-23 01:12:42,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 01:12:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-23 01:12:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 142. [2020-12-23 01:12:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 01:12:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-12-23 01:12:42,474 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 136 [2020-12-23 01:12:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:42,474 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-12-23 01:12:42,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 01:12:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-12-23 01:12:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 01:12:42,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:42,476 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 17, 17, 17, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:42,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:42,691 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:42,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:42,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1877634853, now seen corresponding path program 24 times [2020-12-23 01:12:42,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:42,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319425313] [2020-12-23 01:12:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2020-12-23 01:12:43,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319425313] [2020-12-23 01:12:43,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674997026] [2020-12-23 01:12:43,576 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:45,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-23 01:12:45,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 01:12:45,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 86 proven. 469 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-12-23 01:12:46,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:46,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24] total 54 [2020-12-23 01:12:46,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036449888] [2020-12-23 01:12:46,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 01:12:46,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 01:12:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2077, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 01:12:46,201 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 54 states. [2020-12-23 01:12:47,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:47,479 INFO L93 Difference]: Finished difference Result 234 states and 240 transitions. [2020-12-23 01:12:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 01:12:47,480 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 141 [2020-12-23 01:12:47,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:47,482 INFO L225 Difference]: With dead ends: 234 [2020-12-23 01:12:47,482 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 01:12:47,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=916, Invalid=3776, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 01:12:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 01:12:47,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2020-12-23 01:12:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 01:12:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2020-12-23 01:12:47,495 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 141 [2020-12-23 01:12:47,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:47,495 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2020-12-23 01:12:47,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 01:12:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2020-12-23 01:12:47,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 01:12:47,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:47,496 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:47,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 01:12:47,711 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:47,712 INFO L82 PathProgramCache]: Analyzing trace with hash -954155808, now seen corresponding path program 25 times [2020-12-23 01:12:47,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:47,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396577876] [2020-12-23 01:12:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-23 01:12:48,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396577876] [2020-12-23 01:12:48,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621363769] [2020-12-23 01:12:48,688 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 01:12:48,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-23 01:12:51,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:51,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-12-23 01:12:51,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428345103] [2020-12-23 01:12:51,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 01:12:51,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:51,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 01:12:51,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:12:51,298 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 68 states. [2020-12-23 01:12:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:51,499 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2020-12-23 01:12:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 01:12:51,500 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 150 [2020-12-23 01:12:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:51,501 INFO L225 Difference]: With dead ends: 238 [2020-12-23 01:12:51,501 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 01:12:51,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:12:51,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 01:12:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-23 01:12:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 01:12:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2020-12-23 01:12:51,512 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2020-12-23 01:12:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:51,513 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2020-12-23 01:12:51,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 01:12:51,513 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2020-12-23 01:12:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 01:12:51,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:51,514 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:51,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 01:12:51,728 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:51,729 INFO L82 PathProgramCache]: Analyzing trace with hash 674980962, now seen corresponding path program 26 times [2020-12-23 01:12:51,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:51,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074780866] [2020-12-23 01:12:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-23 01:12:52,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074780866] [2020-12-23 01:12:52,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428031536] [2020-12-23 01:12:52,872 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:52,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:52,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:52,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 01:12:52,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-23 01:12:55,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:55,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2020-12-23 01:12:55,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794739695] [2020-12-23 01:12:55,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 01:12:55,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:55,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 01:12:55,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 01:12:55,528 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 70 states. [2020-12-23 01:12:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:55,714 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2020-12-23 01:12:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 01:12:55,715 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 152 [2020-12-23 01:12:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:55,716 INFO L225 Difference]: With dead ends: 240 [2020-12-23 01:12:55,716 INFO L226 Difference]: Without dead ends: 156 [2020-12-23 01:12:55,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 01:12:55,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-23 01:12:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-12-23 01:12:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 01:12:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-12-23 01:12:55,728 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2020-12-23 01:12:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:55,728 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-12-23 01:12:55,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 01:12:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-12-23 01:12:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 01:12:55,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:55,730 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:55,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 01:12:55,943 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:55,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1387646108, now seen corresponding path program 27 times [2020-12-23 01:12:55,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:55,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492239113] [2020-12-23 01:12:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-23 01:12:56,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492239113] [2020-12-23 01:12:56,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095764267] [2020-12-23 01:12:56,985 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:57,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 01:12:57,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:57,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:12:57,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2020-12-23 01:12:58,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:58,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 20] total 55 [2020-12-23 01:12:58,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063468324] [2020-12-23 01:12:58,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 01:12:58,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:58,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 01:12:58,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=2115, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 01:12:58,266 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 55 states. [2020-12-23 01:12:58,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:58,856 INFO L93 Difference]: Finished difference Result 340 states and 345 transitions. [2020-12-23 01:12:58,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 01:12:58,857 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 154 [2020-12-23 01:12:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:58,858 INFO L225 Difference]: With dead ends: 340 [2020-12-23 01:12:58,859 INFO L226 Difference]: Without dead ends: 256 [2020-12-23 01:12:58,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=855, Invalid=2115, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 01:12:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-23 01:12:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 160. [2020-12-23 01:12:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 01:12:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2020-12-23 01:12:58,872 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 154 [2020-12-23 01:12:58,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:58,872 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2020-12-23 01:12:58,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 01:12:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2020-12-23 01:12:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-23 01:12:58,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:58,874 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 18, 18, 18, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:59,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 01:12:59,087 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:59,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1495693730, now seen corresponding path program 28 times [2020-12-23 01:12:59,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:59,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119507812] [2020-12-23 01:12:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2020-12-23 01:13:00,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119507812] [2020-12-23 01:13:00,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336579340] [2020-12-23 01:13:00,286 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:00,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:13:00,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:00,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:13:00,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2020-12-23 01:13:01,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:01,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 21] total 57 [2020-12-23 01:13:01,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536681060] [2020-12-23 01:13:01,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 01:13:01,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:01,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 01:13:01,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=2280, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 01:13:01,385 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 57 states. [2020-12-23 01:13:01,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:01,928 INFO L93 Difference]: Finished difference Result 355 states and 360 transitions. [2020-12-23 01:13:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 01:13:01,929 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 159 [2020-12-23 01:13:01,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:01,931 INFO L225 Difference]: With dead ends: 355 [2020-12-23 01:13:01,931 INFO L226 Difference]: Without dead ends: 268 [2020-12-23 01:13:01,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=912, Invalid=2280, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 01:13:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-12-23 01:13:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 165. [2020-12-23 01:13:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 01:13:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2020-12-23 01:13:01,944 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 159 [2020-12-23 01:13:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:01,944 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2020-12-23 01:13:01,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 01:13:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2020-12-23 01:13:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-23 01:13:01,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:01,946 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 19, 19, 19, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:02,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 01:13:02,159 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:02,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1539323032, now seen corresponding path program 29 times [2020-12-23 01:13:02,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:02,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209091617] [2020-12-23 01:13:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2020-12-23 01:13:03,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209091617] [2020-12-23 01:13:03,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378233774] [2020-12-23 01:13:03,427 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:17,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-23 01:13:17,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:17,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 01:13:17,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1361 trivial. 0 not checked. [2020-12-23 01:13:18,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:18,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 22] total 59 [2020-12-23 01:13:18,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450884743] [2020-12-23 01:13:18,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 01:13:18,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:18,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 01:13:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=2451, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 01:13:18,098 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 59 states. [2020-12-23 01:13:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:18,723 INFO L93 Difference]: Finished difference Result 370 states and 375 transitions. [2020-12-23 01:13:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 01:13:18,724 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 164 [2020-12-23 01:13:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:18,726 INFO L225 Difference]: With dead ends: 370 [2020-12-23 01:13:18,726 INFO L226 Difference]: Without dead ends: 280 [2020-12-23 01:13:18,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=971, Invalid=2451, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 01:13:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-12-23 01:13:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 170. [2020-12-23 01:13:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 01:13:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2020-12-23 01:13:18,743 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 164 [2020-12-23 01:13:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:18,743 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2020-12-23 01:13:18,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 01:13:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2020-12-23 01:13:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 01:13:18,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:18,745 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 20, 20, 20, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:18,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 01:13:18,960 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:18,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:18,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1789425062, now seen corresponding path program 30 times [2020-12-23 01:13:18,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:18,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294493679] [2020-12-23 01:13:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2020-12-23 01:13:20,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294493679] [2020-12-23 01:13:20,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625882749] [2020-12-23 01:13:20,343 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:38,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2020-12-23 01:13:38,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:38,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 01:13:38,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 1670 trivial. 0 not checked. [2020-12-23 01:13:39,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:39,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 17] total 55 [2020-12-23 01:13:39,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48232249] [2020-12-23 01:13:39,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 01:13:39,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:39,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 01:13:39,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=2148, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 01:13:39,401 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 55 states. [2020-12-23 01:13:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:41,143 INFO L93 Difference]: Finished difference Result 275 states and 280 transitions. [2020-12-23 01:13:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 01:13:41,149 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 169 [2020-12-23 01:13:41,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:41,150 INFO L225 Difference]: With dead ends: 275 [2020-12-23 01:13:41,150 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 01:13:41,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=837, Invalid=2469, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 01:13:41,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 01:13:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2020-12-23 01:13:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 01:13:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2020-12-23 01:13:41,164 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 169 [2020-12-23 01:13:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:41,164 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2020-12-23 01:13:41,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 01:13:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2020-12-23 01:13:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 01:13:41,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:41,166 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:41,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 01:13:41,381 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:41,382 INFO L82 PathProgramCache]: Analyzing trace with hash 698926025, now seen corresponding path program 31 times [2020-12-23 01:13:41,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:41,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282448039] [2020-12-23 01:13:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-23 01:13:42,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282448039] [2020-12-23 01:13:42,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251334833] [2020-12-23 01:13:42,851 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:42,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 01:13:42,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-23 01:13:46,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:46,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2020-12-23 01:13:46,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161274949] [2020-12-23 01:13:46,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 01:13:46,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:46,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 01:13:46,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 01:13:46,496 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 80 states. [2020-12-23 01:13:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:46,719 INFO L93 Difference]: Finished difference Result 278 states and 282 transitions. [2020-12-23 01:13:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 01:13:46,720 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 176 [2020-12-23 01:13:46,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:46,722 INFO L225 Difference]: With dead ends: 278 [2020-12-23 01:13:46,722 INFO L226 Difference]: Without dead ends: 180 [2020-12-23 01:13:46,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 01:13:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-23 01:13:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-12-23 01:13:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 01:13:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2020-12-23 01:13:46,734 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2020-12-23 01:13:46,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:46,735 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2020-12-23 01:13:46,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 01:13:46,735 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2020-12-23 01:13:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-23 01:13:46,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:46,736 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:46,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:46,952 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:46,952 INFO L82 PathProgramCache]: Analyzing trace with hash -77910837, now seen corresponding path program 32 times [2020-12-23 01:13:46,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:46,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776098979] [2020-12-23 01:13:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-23 01:13:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776098979] [2020-12-23 01:13:48,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739614636] [2020-12-23 01:13:48,502 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:48,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:13:48,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 01:13:48,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-23 01:13:52,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:52,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2020-12-23 01:13:52,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043067091] [2020-12-23 01:13:52,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 01:13:52,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 01:13:52,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 01:13:52,230 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 82 states. [2020-12-23 01:13:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:52,461 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2020-12-23 01:13:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 01:13:52,461 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 178 [2020-12-23 01:13:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:52,463 INFO L225 Difference]: With dead ends: 280 [2020-12-23 01:13:52,463 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 01:13:52,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 01:13:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 01:13:52,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-12-23 01:13:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 01:13:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2020-12-23 01:13:52,475 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2020-12-23 01:13:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:52,476 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2020-12-23 01:13:52,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 01:13:52,476 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2020-12-23 01:13:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-23 01:13:52,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:52,477 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:52,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:52,693 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:52,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:52,694 INFO L82 PathProgramCache]: Analyzing trace with hash 706174285, now seen corresponding path program 33 times [2020-12-23 01:13:52,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:52,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734661139] [2020-12-23 01:13:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-23 01:13:54,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734661139] [2020-12-23 01:13:54,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20901116] [2020-12-23 01:13:54,211 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:54,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-23 01:13:54,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:54,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 01:13:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 1693 trivial. 0 not checked. [2020-12-23 01:13:56,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:56,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 23] total 64 [2020-12-23 01:13:56,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440047775] [2020-12-23 01:13:56,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 01:13:56,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:56,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 01:13:56,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=2877, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 01:13:56,062 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 64 states. [2020-12-23 01:13:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:56,724 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2020-12-23 01:13:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 01:13:56,725 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 180 [2020-12-23 01:13:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:56,727 INFO L225 Difference]: With dead ends: 394 [2020-12-23 01:13:56,727 INFO L226 Difference]: Without dead ends: 296 [2020-12-23 01:13:56,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1155, Invalid=2877, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 01:13:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-23 01:13:56,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 186. [2020-12-23 01:13:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 01:13:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2020-12-23 01:13:56,741 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 180 [2020-12-23 01:13:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:56,742 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2020-12-23 01:13:56,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 01:13:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2020-12-23 01:13:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-23 01:13:56,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:56,743 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 21, 21, 21, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:56,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:56,958 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:56,958 INFO L82 PathProgramCache]: Analyzing trace with hash 262194479, now seen corresponding path program 34 times [2020-12-23 01:13:56,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:56,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632453335] [2020-12-23 01:13:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2020-12-23 01:13:58,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632453335] [2020-12-23 01:13:58,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219625049] [2020-12-23 01:13:58,573 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:58,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:13:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:58,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 01:13:58,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2020-12-23 01:14:00,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:00,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 24] total 66 [2020-12-23 01:14:00,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134005316] [2020-12-23 01:14:00,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 01:14:00,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:00,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 01:14:00,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 01:14:00,061 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 66 states. [2020-12-23 01:14:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:00,774 INFO L93 Difference]: Finished difference Result 409 states and 414 transitions. [2020-12-23 01:14:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 01:14:00,774 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 185 [2020-12-23 01:14:00,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:00,776 INFO L225 Difference]: With dead ends: 409 [2020-12-23 01:14:00,777 INFO L226 Difference]: Without dead ends: 308 [2020-12-23 01:14:00,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 01:14:00,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-23 01:14:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 191. [2020-12-23 01:14:00,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 01:14:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2020-12-23 01:14:00,791 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 185 [2020-12-23 01:14:00,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:00,791 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2020-12-23 01:14:00,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 01:14:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2020-12-23 01:14:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-23 01:14:00,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:00,793 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 22, 22, 22, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:01,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 01:14:01,007 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:01,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:01,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2065965231, now seen corresponding path program 35 times [2020-12-23 01:14:01,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:01,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285534924] [2020-12-23 01:14:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2020-12-23 01:14:02,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285534924] [2020-12-23 01:14:02,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172960830] [2020-12-23 01:14:02,672 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:13,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-23 01:14:13,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:14:13,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:14:13,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1857 trivial. 0 not checked. [2020-12-23 01:14:15,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:15,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 25] total 68 [2020-12-23 01:14:15,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506017654] [2020-12-23 01:14:15,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 01:14:15,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:15,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 01:14:15,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1289, Invalid=3267, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:14:15,323 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 68 states. [2020-12-23 01:14:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:15,875 INFO L93 Difference]: Finished difference Result 424 states and 429 transitions. [2020-12-23 01:14:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 01:14:15,876 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 190 [2020-12-23 01:14:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:15,879 INFO L225 Difference]: With dead ends: 424 [2020-12-23 01:14:15,879 INFO L226 Difference]: Without dead ends: 320 [2020-12-23 01:14:15,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1289, Invalid=3267, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:14:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-23 01:14:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 196. [2020-12-23 01:14:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 01:14:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2020-12-23 01:14:15,893 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 190 [2020-12-23 01:14:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:15,893 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2020-12-23 01:14:15,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 01:14:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2020-12-23 01:14:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-23 01:14:15,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:15,895 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 23, 23, 23, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:16,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:16,110 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:16,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1135574827, now seen corresponding path program 36 times [2020-12-23 01:14:16,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:16,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481591447] [2020-12-23 01:14:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2020-12-23 01:14:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481591447] [2020-12-23 01:14:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056356299] [2020-12-23 01:14:18,007 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:34,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2020-12-23 01:14:34,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:14:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 01:14:34,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2020-12-23 01:14:36,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:36,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 23] total 67 [2020-12-23 01:14:36,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080745698] [2020-12-23 01:14:36,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 01:14:36,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:36,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 01:14:36,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1118, Invalid=3304, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 01:14:36,256 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 67 states. [2020-12-23 01:14:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:41,188 INFO L93 Difference]: Finished difference Result 315 states and 320 transitions. [2020-12-23 01:14:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 01:14:41,189 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 195 [2020-12-23 01:14:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:41,191 INFO L225 Difference]: With dead ends: 315 [2020-12-23 01:14:41,191 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 01:14:41,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3213, Invalid=9897, Unknown=0, NotChecked=0, Total=13110 [2020-12-23 01:14:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 01:14:41,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2020-12-23 01:14:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-23 01:14:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2020-12-23 01:14:41,207 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 195 [2020-12-23 01:14:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:41,207 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2020-12-23 01:14:41,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 01:14:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2020-12-23 01:14:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-23 01:14:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:41,209 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:41,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:41,422 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:41,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:41,423 INFO L82 PathProgramCache]: Analyzing trace with hash -90608872, now seen corresponding path program 37 times [2020-12-23 01:14:41,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:41,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620510920] [2020-12-23 01:14:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-23 01:14:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620510920] [2020-12-23 01:14:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563245530] [2020-12-23 01:14:43,421 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 01:14:43,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-23 01:14:48,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:48,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2020-12-23 01:14:48,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959435496] [2020-12-23 01:14:48,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-23 01:14:48,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-23 01:14:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 01:14:48,426 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 92 states. [2020-12-23 01:14:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:48,728 INFO L93 Difference]: Finished difference Result 318 states and 322 transitions. [2020-12-23 01:14:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 01:14:48,729 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 202 [2020-12-23 01:14:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:48,730 INFO L225 Difference]: With dead ends: 318 [2020-12-23 01:14:48,730 INFO L226 Difference]: Without dead ends: 206 [2020-12-23 01:14:48,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 01:14:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-23 01:14:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2020-12-23 01:14:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-23 01:14:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2020-12-23 01:14:48,747 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2020-12-23 01:14:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:48,748 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2020-12-23 01:14:48,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-23 01:14:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2020-12-23 01:14:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-23 01:14:48,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:48,749 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:48,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 01:14:48,965 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:48,965 INFO L82 PathProgramCache]: Analyzing trace with hash -464734822, now seen corresponding path program 38 times [2020-12-23 01:14:48,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:48,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827203910] [2020-12-23 01:14:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-23 01:14:51,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827203910] [2020-12-23 01:14:51,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075805123] [2020-12-23 01:14:51,044 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:51,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:14:51,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:14:51,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 01:14:51,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-23 01:14:56,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:56,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2020-12-23 01:14:56,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972084010] [2020-12-23 01:14:56,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-23 01:14:56,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:56,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-23 01:14:56,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 01:14:56,267 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 94 states. [2020-12-23 01:14:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:56,583 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2020-12-23 01:14:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 01:14:56,583 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 204 [2020-12-23 01:14:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:56,585 INFO L225 Difference]: With dead ends: 320 [2020-12-23 01:14:56,585 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 01:14:56,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 01:14:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 01:14:56,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-12-23 01:14:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-23 01:14:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2020-12-23 01:14:56,599 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2020-12-23 01:14:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:56,599 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2020-12-23 01:14:56,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-23 01:14:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2020-12-23 01:14:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-23 01:14:56,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:56,601 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:56,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 01:14:56,814 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:56,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:56,815 INFO L82 PathProgramCache]: Analyzing trace with hash 777480092, now seen corresponding path program 39 times [2020-12-23 01:14:56,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:56,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848940140] [2020-12-23 01:14:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-23 01:14:59,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848940140] [2020-12-23 01:14:59,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169804484] [2020-12-23 01:14:59,077 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:00,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-23 01:15:00,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:15:00,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 01:15:00,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:15:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 2242 trivial. 0 not checked. [2020-12-23 01:15:02,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:15:02,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 26] total 73 [2020-12-23 01:15:02,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490223709] [2020-12-23 01:15:02,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 01:15:02,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:15:02,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 01:15:02,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1500, Invalid=3756, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 01:15:02,251 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 73 states. [2020-12-23 01:15:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:15:03,118 INFO L93 Difference]: Finished difference Result 448 states and 453 transitions. [2020-12-23 01:15:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 01:15:03,119 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 206 [2020-12-23 01:15:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:15:03,121 INFO L225 Difference]: With dead ends: 448 [2020-12-23 01:15:03,121 INFO L226 Difference]: Without dead ends: 336 [2020-12-23 01:15:03,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1500, Invalid=3756, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 01:15:03,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-23 01:15:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 212. [2020-12-23 01:15:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-23 01:15:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2020-12-23 01:15:03,135 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 206 [2020-12-23 01:15:03,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:15:03,135 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2020-12-23 01:15:03,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 01:15:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2020-12-23 01:15:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-23 01:15:03,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:15:03,137 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 24, 24, 24, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:15:03,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 01:15:03,344 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:15:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:15:03,344 INFO L82 PathProgramCache]: Analyzing trace with hash -26444698, now seen corresponding path program 40 times [2020-12-23 01:15:03,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:15:03,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062114270] [2020-12-23 01:15:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:15:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:15:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2020-12-23 01:15:05,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062114270] [2020-12-23 01:15:05,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853875032] [2020-12-23 01:15:05,662 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:05,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:15:05,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:15:05,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 01:15:05,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:15:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 2335 trivial. 0 not checked. [2020-12-23 01:15:07,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:15:07,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2020-12-23 01:15:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955581708] [2020-12-23 01:15:07,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 01:15:07,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:15:07,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 01:15:07,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1575, Invalid=3975, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 01:15:07,712 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 75 states. [2020-12-23 01:15:08,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:15:08,609 INFO L93 Difference]: Finished difference Result 463 states and 468 transitions. [2020-12-23 01:15:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 01:15:08,610 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 211 [2020-12-23 01:15:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:15:08,612 INFO L225 Difference]: With dead ends: 463 [2020-12-23 01:15:08,612 INFO L226 Difference]: Without dead ends: 348 [2020-12-23 01:15:08,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1575, Invalid=3975, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 01:15:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-23 01:15:08,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 217. [2020-12-23 01:15:08,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 01:15:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2020-12-23 01:15:08,630 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 211 [2020-12-23 01:15:08,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:15:08,630 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2020-12-23 01:15:08,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 01:15:08,630 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2020-12-23 01:15:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-23 01:15:08,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:15:08,632 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 25, 25, 25, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:15:08,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:08,847 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:15:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:15:08,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1995828320, now seen corresponding path program 41 times [2020-12-23 01:15:08,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:15:08,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745146516] [2020-12-23 01:15:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:15:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:15:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 1051 trivial. 0 not checked. [2020-12-23 01:15:11,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745146516] [2020-12-23 01:15:11,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539520814] [2020-12-23 01:15:11,343 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:35,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-12-23 01:15:35,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:15:35,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 01:15:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:15:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2020-12-23 01:15:37,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:15:37,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 28] total 77 [2020-12-23 01:15:37,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386492405] [2020-12-23 01:15:37,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 01:15:37,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:15:37,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 01:15:37,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1652, Invalid=4200, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 01:15:37,518 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 77 states. [2020-12-23 01:15:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:15:38,463 INFO L93 Difference]: Finished difference Result 478 states and 483 transitions. [2020-12-23 01:15:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 01:15:38,465 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 216 [2020-12-23 01:15:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:15:38,466 INFO L225 Difference]: With dead ends: 478 [2020-12-23 01:15:38,466 INFO L226 Difference]: Without dead ends: 360 [2020-12-23 01:15:38,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1652, Invalid=4200, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 01:15:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-12-23 01:15:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 222. [2020-12-23 01:15:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-23 01:15:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2020-12-23 01:15:38,487 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 216 [2020-12-23 01:15:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:15:38,488 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2020-12-23 01:15:38,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 01:15:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2020-12-23 01:15:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-23 01:15:38,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:15:38,489 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 26, 26, 26, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:15:38,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:38,704 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:15:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:15:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1098077086, now seen corresponding path program 42 times [2020-12-23 01:15:38,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:15:38,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972622367] [2020-12-23 01:15:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:15:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:15:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2020-12-23 01:15:41,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972622367] [2020-12-23 01:15:41,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367110138] [2020-12-23 01:15:41,313 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true