/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-industry-pattern/array_range_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:09:32,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:09:32,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:09:32,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 10:09:32,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:09:32,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:09:32,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:09:32,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:09:32,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:09:32,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:09:32,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:09:32,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:09:32,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:09:32,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:09:32,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:09:32,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:09:32,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:09:32,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:09:32,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:09:32,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:09:32,848 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:09:32,884 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:09:32,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:09:32,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:09:32,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:09:32,886 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:09:32,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:09:32,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:09:32,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:09:32,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:09:32,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:09:32,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:09:32,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:09:32,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:09:32,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:09:32,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:09:32,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:09:32,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:09:32,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:09:32,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:09:32,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:09:32,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:09:32,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:09:32,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:09:32,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:09:32,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:09:32,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:09:33,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:09:33,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:09:33,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:09:33,294 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:09:33,295 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:09:33,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_range_init.i [2021-01-06 10:09:33,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f93a3ee23/1ac77829a3b14c3ea3678a036eb6af1c/FLAG27e7ee396 [2021-01-06 10:09:34,048 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:09:34,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_range_init.i [2021-01-06 10:09:34,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f93a3ee23/1ac77829a3b14c3ea3678a036eb6af1c/FLAG27e7ee396 [2021-01-06 10:09:34,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f93a3ee23/1ac77829a3b14c3ea3678a036eb6af1c [2021-01-06 10:09:34,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:09:34,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:09:34,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:09:34,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:09:34,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:09:34,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b2fda72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34, skipping insertion in model container [2021-01-06 10:09:34,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:09:34,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:09:34,622 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_range_init.i[809,822] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:09:34,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:09:34,659 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:09:34,675 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_range_init.i[809,822] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:09:34,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:09:34,706 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:09:34,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34 WrapperNode [2021-01-06 10:09:34,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:09:34,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:09:34,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:09:34,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:09:34,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:09:34,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:09:34,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:09:34,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:09:34,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (1/1) ... [2021-01-06 10:09:34,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:09:34,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:09:34,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:09:34,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:09:34,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:09:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:09:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:09:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:09:34,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:09:34,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:09:34,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:09:35,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:09:35,331 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:09:35,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:09:35 BoogieIcfgContainer [2021-01-06 10:09:35,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:09:35,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:09:35,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:09:35,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:09:35,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:09:34" (1/3) ... [2021-01-06 10:09:35,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540c0b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:09:35, skipping insertion in model container [2021-01-06 10:09:35,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:09:34" (2/3) ... [2021-01-06 10:09:35,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540c0b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:09:35, skipping insertion in model container [2021-01-06 10:09:35,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:09:35" (3/3) ... [2021-01-06 10:09:35,359 INFO L111 eAbstractionObserver]: Analyzing ICFG array_range_init.i [2021-01-06 10:09:35,372 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:09:35,385 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:09:35,411 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:09:35,454 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:09:35,454 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:09:35,454 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:09:35,454 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:09:35,455 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:09:35,455 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:09:35,455 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:09:35,455 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:09:35,475 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 10:09:35,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 10:09:35,481 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:35,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:35,482 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:35,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2021-01-06 10:09:35,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:35,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528773835] [2021-01-06 10:09:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:35,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528773835] [2021-01-06 10:09:35,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:09:35,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:09:35,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684668343] [2021-01-06 10:09:35,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:09:35,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:35,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:09:35,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:09:35,726 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2021-01-06 10:09:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:35,744 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-01-06 10:09:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:09:35,746 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 10:09:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:35,768 INFO L225 Difference]: With dead ends: 27 [2021-01-06 10:09:35,769 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 10:09:35,772 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 [2021-01-06 10:09:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 10:09:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 10:09:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 10:09:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-01-06 10:09:35,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-01-06 10:09:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:35,809 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-01-06 10:09:35,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:09:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-01-06 10:09:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 10:09:35,811 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:35,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:35,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:09:35,812 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2021-01-06 10:09:35,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:35,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129395230] [2021-01-06 10:09:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:35,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129395230] [2021-01-06 10:09:35,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:09:35,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:09:35,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877340271] [2021-01-06 10:09:35,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:09:35,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:35,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:09:35,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:09:35,924 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2021-01-06 10:09:35,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:35,961 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-01-06 10:09:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:09:35,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-06 10:09:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:35,963 INFO L225 Difference]: With dead ends: 31 [2021-01-06 10:09:35,963 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 10:09:35,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:09:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 10:09:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-01-06 10:09:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 10:09:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 10:09:35,969 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2021-01-06 10:09:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:35,970 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 10:09:35,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:09:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 10:09:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:09:35,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:35,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:35,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:09:35,971 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1721274617, now seen corresponding path program 1 times [2021-01-06 10:09:35,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:35,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154922412] [2021-01-06 10:09:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:36,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154922412] [2021-01-06 10:09:36,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648523511] [2021-01-06 10:09:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:09:36,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:36,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:36,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:09:36,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576100398] [2021-01-06 10:09:36,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:09:36,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:36,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:09:36,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:09:36,151 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2021-01-06 10:09:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:36,228 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-01-06 10:09:36,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:09:36,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 10:09:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:36,230 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:09:36,230 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:09:36,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:09:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:09:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2021-01-06 10:09:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:09:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-01-06 10:09:36,236 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-01-06 10:09:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:36,236 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-01-06 10:09:36,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:09:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-01-06 10:09:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:09:36,237 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:36,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:36,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:09:36,452 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:36,454 INFO L82 PathProgramCache]: Analyzing trace with hash -563082289, now seen corresponding path program 2 times [2021-01-06 10:09:36,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:36,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069362918] [2021-01-06 10:09:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:09:36,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069362918] [2021-01-06 10:09:36,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:09:36,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:09:36,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495849611] [2021-01-06 10:09:36,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:09:36,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:36,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:09:36,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:09:36,500 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2021-01-06 10:09:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:36,541 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-01-06 10:09:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:09:36,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 10:09:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:36,544 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:09:36,544 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 10:09:36,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:09:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 10:09:36,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 19. [2021-01-06 10:09:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:09:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-01-06 10:09:36,551 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2021-01-06 10:09:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:36,551 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-01-06 10:09:36,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:09:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-01-06 10:09:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:09:36,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:36,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:36,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 10:09:36,553 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:36,553 INFO L82 PathProgramCache]: Analyzing trace with hash -847687543, now seen corresponding path program 1 times [2021-01-06 10:09:36,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:36,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117867674] [2021-01-06 10:09:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:36,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117867674] [2021-01-06 10:09:36,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861824152] [2021-01-06 10:09:36,692 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 [2021-01-06 10:09:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:36,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:09:36,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:36,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:36,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:09:36,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072853820] [2021-01-06 10:09:36,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:09:36,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:36,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:09:36,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:09:36,851 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2021-01-06 10:09:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:36,928 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-01-06 10:09:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:09:36,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 10:09:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:36,929 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:09:36,930 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 10:09:36,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:09:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 10:09:36,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 25. [2021-01-06 10:09:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 10:09:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-01-06 10:09:36,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2021-01-06 10:09:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:36,937 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-01-06 10:09:36,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:09:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-01-06 10:09:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:09:36,938 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:36,939 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:37,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:37,154 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1254259593, now seen corresponding path program 2 times [2021-01-06 10:09:37,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:37,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302254297] [2021-01-06 10:09:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:37,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302254297] [2021-01-06 10:09:37,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640501504] [2021-01-06 10:09:37,294 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 [2021-01-06 10:09:37,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:09:37,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:37,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:09:37,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:37,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:37,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:09:37,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022751901] [2021-01-06 10:09:37,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:09:37,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:37,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:09:37,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:09:37,440 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2021-01-06 10:09:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:37,557 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-01-06 10:09:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:09:37,558 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2021-01-06 10:09:37,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:37,567 INFO L225 Difference]: With dead ends: 85 [2021-01-06 10:09:37,567 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 10:09:37,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:09:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 10:09:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 31. [2021-01-06 10:09:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:09:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-01-06 10:09:37,590 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 22 [2021-01-06 10:09:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:37,591 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-01-06 10:09:37,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:09:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-01-06 10:09:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:09:37,592 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:37,592 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:37,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:37,811 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:37,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:37,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1723898231, now seen corresponding path program 3 times [2021-01-06 10:09:37,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:37,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042609640] [2021-01-06 10:09:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:37,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042609640] [2021-01-06 10:09:37,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897181689] [2021-01-06 10:09:37,930 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 [2021-01-06 10:09:38,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:09:38,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:38,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:09:38,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 10:09:38,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:38,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-01-06 10:09:38,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524996484] [2021-01-06 10:09:38,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:09:38,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:38,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:09:38,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:09:38,101 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 13 states. [2021-01-06 10:09:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:38,297 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2021-01-06 10:09:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:09:38,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2021-01-06 10:09:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:38,299 INFO L225 Difference]: With dead ends: 145 [2021-01-06 10:09:38,299 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 10:09:38,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:09:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 10:09:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 43. [2021-01-06 10:09:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:09:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-01-06 10:09:38,309 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 28 [2021-01-06 10:09:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:38,310 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-01-06 10:09:38,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:09:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-01-06 10:09:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 10:09:38,311 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:38,311 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:38,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:38,526 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:38,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:38,526 INFO L82 PathProgramCache]: Analyzing trace with hash 388456135, now seen corresponding path program 4 times [2021-01-06 10:09:38,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:38,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944538864] [2021-01-06 10:09:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:38,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944538864] [2021-01-06 10:09:38,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341686322] [2021-01-06 10:09:38,721 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 [2021-01-06 10:09:38,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:09:38,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:09:38,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:38,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:38,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:09:38,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673548880] [2021-01-06 10:09:38,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:09:38,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:38,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:09:38,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:09:38,936 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 15 states. [2021-01-06 10:09:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:39,111 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2021-01-06 10:09:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:09:39,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2021-01-06 10:09:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:39,113 INFO L225 Difference]: With dead ends: 179 [2021-01-06 10:09:39,113 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 10:09:39,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:09:39,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 10:09:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 52. [2021-01-06 10:09:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:09:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-01-06 10:09:39,123 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 40 [2021-01-06 10:09:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:39,124 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-01-06 10:09:39,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:09:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-01-06 10:09:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:09:39,125 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:39,126 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:39,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:39,339 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:39,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1486396785, now seen corresponding path program 5 times [2021-01-06 10:09:39,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:39,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150253684] [2021-01-06 10:09:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:39,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150253684] [2021-01-06 10:09:39,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707668289] [2021-01-06 10:09:39,577 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 [2021-01-06 10:09:39,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-01-06 10:09:39,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:39,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:09:39,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 63 proven. 222 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:09:39,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:39,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-01-06 10:09:39,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31269971] [2021-01-06 10:09:39,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:09:39,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:39,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:09:39,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:09:39,998 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 30 states. [2021-01-06 10:09:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:40,884 INFO L93 Difference]: Finished difference Result 236 states and 279 transitions. [2021-01-06 10:09:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:09:40,885 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2021-01-06 10:09:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:40,889 INFO L225 Difference]: With dead ends: 236 [2021-01-06 10:09:40,889 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:09:40,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=423, Invalid=1217, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:09:40,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:09:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 64. [2021-01-06 10:09:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:09:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-01-06 10:09:40,917 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 49 [2021-01-06 10:09:40,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:40,917 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-01-06 10:09:40,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:09:40,917 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-01-06 10:09:40,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:09:40,922 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:40,922 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:41,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:41,124 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:41,125 INFO L82 PathProgramCache]: Analyzing trace with hash 349904839, now seen corresponding path program 6 times [2021-01-06 10:09:41,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:41,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823994676] [2021-01-06 10:09:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:41,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823994676] [2021-01-06 10:09:41,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822022290] [2021-01-06 10:09:41,456 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 [2021-01-06 10:09:41,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:09:41,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:41,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:09:41,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 117 proven. 7 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-01-06 10:09:41,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:41,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6] total 24 [2021-01-06 10:09:41,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162370228] [2021-01-06 10:09:41,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:09:41,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:41,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:09:41,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:09:41,686 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 24 states. [2021-01-06 10:09:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:41,933 INFO L93 Difference]: Finished difference Result 300 states and 329 transitions. [2021-01-06 10:09:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:09:41,934 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2021-01-06 10:09:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:41,936 INFO L225 Difference]: With dead ends: 300 [2021-01-06 10:09:41,936 INFO L226 Difference]: Without dead ends: 293 [2021-01-06 10:09:41,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:09:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-01-06 10:09:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 157. [2021-01-06 10:09:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 10:09:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 183 transitions. [2021-01-06 10:09:41,953 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 183 transitions. Word has length 58 [2021-01-06 10:09:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:41,953 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 183 transitions. [2021-01-06 10:09:41,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:09:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 183 transitions. [2021-01-06 10:09:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:09:41,955 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:41,955 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 19, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:42,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:09:42,170 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:42,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1751630737, now seen corresponding path program 7 times [2021-01-06 10:09:42,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:42,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187110557] [2021-01-06 10:09:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:42,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187110557] [2021-01-06 10:09:42,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523328009] [2021-01-06 10:09:42,697 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:42,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:09:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:42,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:42,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 10:09:42,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748171982] [2021-01-06 10:09:42,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:09:42,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:42,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:09:42,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:09:42,960 INFO L87 Difference]: Start difference. First operand 157 states and 183 transitions. Second operand 26 states. [2021-01-06 10:09:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:43,215 INFO L93 Difference]: Finished difference Result 386 states and 440 transitions. [2021-01-06 10:09:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:09:43,215 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2021-01-06 10:09:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:43,219 INFO L225 Difference]: With dead ends: 386 [2021-01-06 10:09:43,219 INFO L226 Difference]: Without dead ends: 379 [2021-01-06 10:09:43,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:09:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-01-06 10:09:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 133. [2021-01-06 10:09:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 10:09:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2021-01-06 10:09:43,236 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 73 [2021-01-06 10:09:43,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:43,237 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2021-01-06 10:09:43,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:09:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2021-01-06 10:09:43,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 10:09:43,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:43,239 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 23, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:43,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:09:43,454 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:43,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1063153041, now seen corresponding path program 8 times [2021-01-06 10:09:43,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:43,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237583782] [2021-01-06 10:09:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:44,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237583782] [2021-01-06 10:09:44,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42115813] [2021-01-06 10:09:44,001 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 [2021-01-06 10:09:44,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:09:44,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:09:44,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:44,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:44,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 10:09:44,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588161504] [2021-01-06 10:09:44,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:09:44,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:09:44,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:09:44,200 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand 30 states. [2021-01-06 10:09:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:44,515 INFO L93 Difference]: Finished difference Result 386 states and 443 transitions. [2021-01-06 10:09:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:09:44,516 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2021-01-06 10:09:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:44,518 INFO L225 Difference]: With dead ends: 386 [2021-01-06 10:09:44,518 INFO L226 Difference]: Without dead ends: 379 [2021-01-06 10:09:44,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:09:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-01-06 10:09:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 145. [2021-01-06 10:09:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 10:09:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2021-01-06 10:09:44,530 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 85 [2021-01-06 10:09:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:44,531 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2021-01-06 10:09:44,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:09:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2021-01-06 10:09:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 10:09:44,532 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:44,533 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 27, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:44,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:44,746 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:44,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:44,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1470502801, now seen corresponding path program 9 times [2021-01-06 10:09:44,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:44,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208830187] [2021-01-06 10:09:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:45,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208830187] [2021-01-06 10:09:45,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091126087] [2021-01-06 10:09:45,535 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 [2021-01-06 10:09:45,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 10:09:45,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:45,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:09:45,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 293 proven. 15 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-01-06 10:09:45,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:45,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7] total 38 [2021-01-06 10:09:45,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766548679] [2021-01-06 10:09:45,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 10:09:45,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:45,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 10:09:45,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:09:45,882 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand 38 states. [2021-01-06 10:09:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:46,352 INFO L93 Difference]: Finished difference Result 543 states and 625 transitions. [2021-01-06 10:09:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 10:09:46,352 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 97 [2021-01-06 10:09:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:46,356 INFO L225 Difference]: With dead ends: 543 [2021-01-06 10:09:46,356 INFO L226 Difference]: Without dead ends: 536 [2021-01-06 10:09:46,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:09:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-01-06 10:09:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 199. [2021-01-06 10:09:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-01-06 10:09:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 239 transitions. [2021-01-06 10:09:46,370 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 239 transitions. Word has length 97 [2021-01-06 10:09:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:46,370 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 239 transitions. [2021-01-06 10:09:46,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 10:09:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 239 transitions. [2021-01-06 10:09:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 10:09:46,372 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:46,372 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 32, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:46,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:46,586 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1494928817, now seen corresponding path program 10 times [2021-01-06 10:09:46,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:46,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774130413] [2021-01-06 10:09:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:47,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774130413] [2021-01-06 10:09:47,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466562621] [2021-01-06 10:09:47,600 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 [2021-01-06 10:09:47,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:09:47,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:09:47,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:47,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:47,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 10:09:47,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11607204] [2021-01-06 10:09:47,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:09:47,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:09:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:09:47,881 INFO L87 Difference]: Start difference. First operand 199 states and 239 transitions. Second operand 40 states. [2021-01-06 10:09:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:48,373 INFO L93 Difference]: Finished difference Result 596 states and 692 transitions. [2021-01-06 10:09:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:09:48,373 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2021-01-06 10:09:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:48,376 INFO L225 Difference]: With dead ends: 596 [2021-01-06 10:09:48,376 INFO L226 Difference]: Without dead ends: 589 [2021-01-06 10:09:48,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:09:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-01-06 10:09:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 178. [2021-01-06 10:09:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 10:09:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 222 transitions. [2021-01-06 10:09:48,389 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 222 transitions. Word has length 115 [2021-01-06 10:09:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:48,389 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 222 transitions. [2021-01-06 10:09:48,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:09:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 222 transitions. [2021-01-06 10:09:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 10:09:48,391 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:48,391 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 37, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:48,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:09:48,606 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:48,607 INFO L82 PathProgramCache]: Analyzing trace with hash 266693767, now seen corresponding path program 11 times [2021-01-06 10:09:48,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:48,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759045177] [2021-01-06 10:09:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:49,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759045177] [2021-01-06 10:09:49,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999202419] [2021-01-06 10:09:49,835 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 [2021-01-06 10:09:57,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 10:09:57,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:57,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 10:09:57,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:57,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:57,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 10:09:57,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792338208] [2021-01-06 10:09:57,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 10:09:57,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:57,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 10:09:57,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:09:57,847 INFO L87 Difference]: Start difference. First operand 178 states and 222 transitions. Second operand 45 states. [2021-01-06 10:09:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:58,463 INFO L93 Difference]: Finished difference Result 569 states and 657 transitions. [2021-01-06 10:09:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 10:09:58,463 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2021-01-06 10:09:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:58,466 INFO L225 Difference]: With dead ends: 569 [2021-01-06 10:09:58,467 INFO L226 Difference]: Without dead ends: 562 [2021-01-06 10:09:58,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:09:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-01-06 10:09:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 193. [2021-01-06 10:09:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2021-01-06 10:09:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 242 transitions. [2021-01-06 10:09:58,480 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 242 transitions. Word has length 130 [2021-01-06 10:09:58,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:58,480 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 242 transitions. [2021-01-06 10:09:58,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 10:09:58,480 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 242 transitions. [2021-01-06 10:09:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-01-06 10:09:58,482 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:58,482 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 42, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:58,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:09:58,698 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:58,699 INFO L82 PathProgramCache]: Analyzing trace with hash -351110321, now seen corresponding path program 12 times [2021-01-06 10:09:58,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:58,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243436070] [2021-01-06 10:09:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:00,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243436070] [2021-01-06 10:10:00,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222147955] [2021-01-06 10:10:00,296 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 [2021-01-06 10:10:00,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 10:10:00,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:10:00,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:10:00,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:10:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 583 proven. 26 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-01-06 10:10:01,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:10:01,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 8] total 55 [2021-01-06 10:10:01,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193980374] [2021-01-06 10:10:01,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 10:10:01,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:10:01,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 10:10:01,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 10:10:01,072 INFO L87 Difference]: Start difference. First operand 193 states and 242 transitions. Second operand 55 states. [2021-01-06 10:10:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:10:02,079 INFO L93 Difference]: Finished difference Result 789 states and 919 transitions. [2021-01-06 10:10:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 10:10:02,080 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 145 [2021-01-06 10:10:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:10:02,083 INFO L225 Difference]: With dead ends: 789 [2021-01-06 10:10:02,083 INFO L226 Difference]: Without dead ends: 782 [2021-01-06 10:10:02,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 10:10:02,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-01-06 10:10:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 250. [2021-01-06 10:10:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2021-01-06 10:10:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-01-06 10:10:02,101 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 145 [2021-01-06 10:10:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:10:02,101 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-01-06 10:10:02,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 10:10:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-01-06 10:10:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 10:10:02,103 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:10:02,103 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 48, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:10:02,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:10:02,312 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:10:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:10:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1248529911, now seen corresponding path program 13 times [2021-01-06 10:10:02,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:10:02,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666948455] [2021-01-06 10:10:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:10:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:04,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666948455] [2021-01-06 10:10:04,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102131635] [2021-01-06 10:10:04,473 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 [2021-01-06 10:10:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 10:10:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:10:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:04,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:10:04,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 10:10:04,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315737692] [2021-01-06 10:10:04,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 10:10:04,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:10:04,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 10:10:04,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 10:10:04,806 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand 57 states. [2021-01-06 10:10:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:10:05,868 INFO L93 Difference]: Finished difference Result 851 states and 998 transitions. [2021-01-06 10:10:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 10:10:05,869 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2021-01-06 10:10:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:10:05,875 INFO L225 Difference]: With dead ends: 851 [2021-01-06 10:10:05,875 INFO L226 Difference]: Without dead ends: 844 [2021-01-06 10:10:05,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 10:10:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-01-06 10:10:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 232. [2021-01-06 10:10:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2021-01-06 10:10:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 294 transitions. [2021-01-06 10:10:05,893 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 294 transitions. Word has length 166 [2021-01-06 10:10:05,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:10:05,893 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 294 transitions. [2021-01-06 10:10:05,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 10:10:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 294 transitions. [2021-01-06 10:10:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-01-06 10:10:05,895 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:10:05,895 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 54, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:10:06,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:10:06,109 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:10:06,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:10:06,110 INFO L82 PathProgramCache]: Analyzing trace with hash 506786569, now seen corresponding path program 14 times [2021-01-06 10:10:06,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:10:06,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491180692] [2021-01-06 10:10:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:10:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:08,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491180692] [2021-01-06 10:10:08,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285946348] [2021-01-06 10:10:08,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:10:08,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:10:08,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:10:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 10:10:08,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:10:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:08,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:10:08,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-01-06 10:10:08,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474309455] [2021-01-06 10:10:08,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 10:10:08,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:10:08,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 10:10:08,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 10:10:08,691 INFO L87 Difference]: Start difference. First operand 232 states and 294 transitions. Second operand 63 states. [2021-01-06 10:10:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:10:09,774 INFO L93 Difference]: Finished difference Result 788 states and 913 transitions. [2021-01-06 10:10:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 10:10:09,774 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 184 [2021-01-06 10:10:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:10:09,778 INFO L225 Difference]: With dead ends: 788 [2021-01-06 10:10:09,778 INFO L226 Difference]: Without dead ends: 781 [2021-01-06 10:10:09,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 10:10:09,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-01-06 10:10:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 250. [2021-01-06 10:10:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2021-01-06 10:10:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 318 transitions. [2021-01-06 10:10:09,801 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 318 transitions. Word has length 184 [2021-01-06 10:10:09,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:10:09,801 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 318 transitions. [2021-01-06 10:10:09,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 10:10:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 318 transitions. [2021-01-06 10:10:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-01-06 10:10:09,804 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:10:09,804 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 60, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:10:10,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:10:10,018 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:10:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:10:10,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1228321801, now seen corresponding path program 15 times [2021-01-06 10:10:10,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:10:10,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896150123] [2021-01-06 10:10:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:10:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:12,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896150123] [2021-01-06 10:10:12,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392300425] [2021-01-06 10:10:12,856 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 [2021-01-06 10:10:12,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:10:12,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:10:12,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:10:12,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:10:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 1014 proven. 40 refuted. 0 times theorem prover too weak. 5251 trivial. 0 not checked. [2021-01-06 10:10:13,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:10:13,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 9] total 75 [2021-01-06 10:10:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923667429] [2021-01-06 10:10:13,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 10:10:13,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:10:13,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 10:10:13,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 10:10:13,661 INFO L87 Difference]: Start difference. First operand 250 states and 318 transitions. Second operand 75 states. [2021-01-06 10:10:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:10:15,501 INFO L93 Difference]: Finished difference Result 1080 states and 1267 transitions. [2021-01-06 10:10:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 10:10:15,501 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 202 [2021-01-06 10:10:15,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:10:15,508 INFO L225 Difference]: With dead ends: 1080 [2021-01-06 10:10:15,508 INFO L226 Difference]: Without dead ends: 1073 [2021-01-06 10:10:15,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 10:10:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-01-06 10:10:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 310. [2021-01-06 10:10:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2021-01-06 10:10:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 387 transitions. [2021-01-06 10:10:15,533 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 387 transitions. Word has length 202 [2021-01-06 10:10:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:10:15,534 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 387 transitions. [2021-01-06 10:10:15,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 10:10:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 387 transitions. [2021-01-06 10:10:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-01-06 10:10:15,537 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:10:15,537 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 67, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:10:15,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:10:15,753 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:10:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:10:15,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1611552071, now seen corresponding path program 16 times [2021-01-06 10:10:15,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:10:15,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957195621] [2021-01-06 10:10:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:10:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:19,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957195621] [2021-01-06 10:10:19,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536112087] [2021-01-06 10:10:19,219 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 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 [2021-01-06 10:10:19,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:10:19,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:10:19,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 10:10:19,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:10:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:19,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:10:19,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2021-01-06 10:10:19,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049876401] [2021-01-06 10:10:19,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 10:10:19,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:10:19,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 10:10:19,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 10:10:19,663 INFO L87 Difference]: Start difference. First operand 310 states and 387 transitions. Second operand 77 states. [2021-01-06 10:10:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:10:21,273 INFO L93 Difference]: Finished difference Result 1151 states and 1358 transitions. [2021-01-06 10:10:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 10:10:21,276 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 226 [2021-01-06 10:10:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:10:21,281 INFO L225 Difference]: With dead ends: 1151 [2021-01-06 10:10:21,281 INFO L226 Difference]: Without dead ends: 1144 [2021-01-06 10:10:21,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 10:10:21,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-01-06 10:10:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 295. [2021-01-06 10:10:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2021-01-06 10:10:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 378 transitions. [2021-01-06 10:10:21,306 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 378 transitions. Word has length 226 [2021-01-06 10:10:21,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:10:21,307 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 378 transitions. [2021-01-06 10:10:21,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 10:10:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 378 transitions. [2021-01-06 10:10:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-01-06 10:10:21,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:10:21,310 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 74, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:10:21,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:10:21,524 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:10:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:10:21,525 INFO L82 PathProgramCache]: Analyzing trace with hash -58443505, now seen corresponding path program 17 times [2021-01-06 10:10:21,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:10:21,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748582249] [2021-01-06 10:10:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:10:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 0 proven. 9560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:25,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748582249] [2021-01-06 10:10:25,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045848173] [2021-01-06 10:10:25,790 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