/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/ldv-regression/test23-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:12:20,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:12:20,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:12:20,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:12:20,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:12:20,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:12:20,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:12:20,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:12:20,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:12:20,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:12:20,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:12:20,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-01-06 16:12:20,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:12:20,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:12:20,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:12:20,797 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 16:12:20,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:12:20,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:12:20,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:12:20,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:12:20,831 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:12:20,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:12:20,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:12:20,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:12:20,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:12:20,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:12:20,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:12:20,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:12:20,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:12:20,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:12:20,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:12:20,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:12:20,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:12:20,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:12:20,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:12:20,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:12:20,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:12:20,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:12:20,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:12:20,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:12:20,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:12:20,838 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:12:21,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:12:21,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:12:21,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:12:21,266 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:12:21,266 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:12:21,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test23-1.c [2021-01-06 16:12:21,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/100488300/c8bf73bf690446a3a0384c6ad15ebc4e/FLAG18dc5176e [2021-01-06 16:12:22,029 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:12:22,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test23-1.c [2021-01-06 16:12:22,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/100488300/c8bf73bf690446a3a0384c6ad15ebc4e/FLAG18dc5176e [2021-01-06 16:12:22,394 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/100488300/c8bf73bf690446a3a0384c6ad15ebc4e [2021-01-06 16:12:22,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:12:22,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:12:22,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:22,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:12:22,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:12:22,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44af2ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22, skipping insertion in model container [2021-01-06 16:12:22,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:12:22,440 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d1~0,GLOBAL],a] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d1~0,GLOBAL],b] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d2~0,GLOBAL],a] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d2~0,GLOBAL],b] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd2~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~pd2~0,],offset]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:12:22,633 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/ldv-regression/test23-1.c[1075,1088] [2021-01-06 16:12:22,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:22,653 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd2~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~pd2~0,],offset]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:12:22,676 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/ldv-regression/test23-1.c[1075,1088] [2021-01-06 16:12:22,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:22,696 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:12:22,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22 WrapperNode [2021-01-06 16:12:22,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:22,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:22,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:12:22,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:12:22,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:22,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:12:22,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:12:22,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:12:22,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (1/1) ... [2021-01-06 16:12:22,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:12:22,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:12:22,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:12:22,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:12:22,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (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 16:12:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:12:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:12:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:12:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:12:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:12:22,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:12:23,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:12:23,449 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 16:12:23,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:23 BoogieIcfgContainer [2021-01-06 16:12:23,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:12:23,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:12:23,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:12:23,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:12:23,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:12:22" (1/3) ... [2021-01-06 16:12:23,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b997e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:23, skipping insertion in model container [2021-01-06 16:12:23,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:22" (2/3) ... [2021-01-06 16:12:23,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b997e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:23, skipping insertion in model container [2021-01-06 16:12:23,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:23" (3/3) ... [2021-01-06 16:12:23,461 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-1.c [2021-01-06 16:12:23,469 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:12:23,477 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:12:23,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:12:23,546 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:12:23,547 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:12:23,547 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:12:23,547 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:12:23,547 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:12:23,547 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:12:23,548 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:12:23,548 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:12:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 16:12:23,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:12:23,574 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:23,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:23,576 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:23,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:23,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2021-01-06 16:12:23,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:23,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383174749] [2021-01-06 16:12:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:23,909 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 16:12:23,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383174749] [2021-01-06 16:12:23,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:23,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:12:23,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484623702] [2021-01-06 16:12:23,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:12:23,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:23,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:12:23,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:12:23,937 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 16:12:23,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:23,975 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-01-06 16:12:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:12:23,977 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2021-01-06 16:12:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:23,988 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:12:23,989 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:12:23,993 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 16:12:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:12:24,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 16:12:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:12:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 16:12:24,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2021-01-06 16:12:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:24,034 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 16:12:24,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:12:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 16:12:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:12:24,036 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:24,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:24,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:12:24,038 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2021-01-06 16:12:24,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:24,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512619159] [2021-01-06 16:12:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:24,577 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 16:12:24,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512619159] [2021-01-06 16:12:24,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:24,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-01-06 16:12:24,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752193228] [2021-01-06 16:12:24,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:12:24,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:24,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:12:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:12:24,582 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 11 states. [2021-01-06 16:12:25,263 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-01-06 16:12:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:25,430 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-01-06 16:12:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:12:25,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2021-01-06 16:12:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:25,432 INFO L225 Difference]: With dead ends: 59 [2021-01-06 16:12:25,433 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 16:12:25,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:12:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 16:12:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 25. [2021-01-06 16:12:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:12:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-01-06 16:12:25,445 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-01-06 16:12:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:25,446 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-01-06 16:12:25,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:12:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-01-06 16:12:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:12:25,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:25,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:25,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:12:25,448 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:25,449 INFO L82 PathProgramCache]: Analyzing trace with hash -108238562, now seen corresponding path program 1 times [2021-01-06 16:12:25,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:25,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232174301] [2021-01-06 16:12:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:25,564 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 16:12:25,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232174301] [2021-01-06 16:12:25,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:25,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 16:12:25,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458571653] [2021-01-06 16:12:25,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:12:25,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:12:25,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:12:25,567 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2021-01-06 16:12:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:25,869 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-01-06 16:12:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:12:25,870 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 16:12:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:25,871 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:12:25,871 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:12:25,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:12:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:12:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2021-01-06 16:12:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:12:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 16:12:25,880 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2021-01-06 16:12:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:25,880 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 16:12:25,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:12:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 16:12:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:12:25,882 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:25,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:25,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:12:25,882 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:25,883 INFO L82 PathProgramCache]: Analyzing trace with hash -501265572, now seen corresponding path program 1 times [2021-01-06 16:12:25,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:25,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517427663] [2021-01-06 16:12:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:26,076 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 16:12:26,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517427663] [2021-01-06 16:12:26,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:26,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-01-06 16:12:26,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067004395] [2021-01-06 16:12:26,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:12:26,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:26,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:12:26,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:12:26,079 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2021-01-06 16:12:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:26,431 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-01-06 16:12:26,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:12:26,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2021-01-06 16:12:26,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:26,433 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:12:26,433 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:12:26,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:12:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:12:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 22. [2021-01-06 16:12:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:12:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 16:12:26,442 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2021-01-06 16:12:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:26,442 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 16:12:26,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:12:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 16:12:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:12:26,443 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:26,443 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:26,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:12:26,444 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1851619425, now seen corresponding path program 1 times [2021-01-06 16:12:26,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:26,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147844430] [2021-01-06 16:12:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:26,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147844430] [2021-01-06 16:12:26,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910294660] [2021-01-06 16:12:26,639 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 16:12:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:26,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:12:26,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:26,831 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-01-06 16:12:26,833 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:12:26,842 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:12:26,845 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:12:26,846 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2021-01-06 16:12:27,029 INFO L348 Elim1Store]: treesize reduction 43, result has 39.4 percent of original size [2021-01-06 16:12:27,030 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 39 [2021-01-06 16:12:27,037 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:12:27,042 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 16:12:27,065 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2021-01-06 16:12:27,070 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:12:27,070 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2021-01-06 16:12:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:27,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:27,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-01-06 16:12:27,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557966577] [2021-01-06 16:12:27,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:12:27,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:27,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:12:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:12:27,102 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 16 states. [2021-01-06 16:12:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:28,084 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-01-06 16:12:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:12:28,085 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2021-01-06 16:12:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:28,086 INFO L225 Difference]: With dead ends: 55 [2021-01-06 16:12:28,086 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:12:28,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:12:28,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:12:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 27. [2021-01-06 16:12:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:12:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-01-06 16:12:28,096 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2021-01-06 16:12:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:28,096 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-01-06 16:12:28,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:12:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-01-06 16:12:28,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:12:28,098 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:28,098 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:28,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:28,312 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:28,313 INFO L82 PathProgramCache]: Analyzing trace with hash 829921185, now seen corresponding path program 1 times [2021-01-06 16:12:28,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:28,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143347979] [2021-01-06 16:12:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:28,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143347979] [2021-01-06 16:12:28,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935952078] [2021-01-06 16:12:28,567 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 16:12:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:28,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:12:28,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:28,741 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-01-06 16:12:28,742 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:12:28,752 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:12:28,755 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:12:28,755 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2021-01-06 16:12:28,887 INFO L348 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-01-06 16:12:28,888 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2021-01-06 16:12:28,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:12:28,896 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 16:12:28,916 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2021-01-06 16:12:28,923 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:12:28,924 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2021-01-06 16:12:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:28,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:28,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-01-06 16:12:28,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858100030] [2021-01-06 16:12:28,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:12:28,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:28,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:12:28,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:12:28,949 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 16 states. [2021-01-06 16:12:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:29,581 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-01-06 16:12:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:12:29,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2021-01-06 16:12:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:29,585 INFO L225 Difference]: With dead ends: 57 [2021-01-06 16:12:29,586 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 16:12:29,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:12:29,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 16:12:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 24. [2021-01-06 16:12:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:12:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 16:12:29,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-01-06 16:12:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:29,598 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 16:12:29,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:12:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 16:12:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:12:29,600 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:29,600 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:29,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:29,814 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:29,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:29,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1495361690, now seen corresponding path program 2 times [2021-01-06 16:12:29,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:29,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632671615] [2021-01-06 16:12:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:30,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632671615] [2021-01-06 16:12:30,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861210074] [2021-01-06 16:12:30,006 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 16:12:30,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:12:30,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:30,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:12:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:30,134 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-01-06 16:12:30,135 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:12:30,146 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:12:30,147 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:12:30,148 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:55 [2021-01-06 16:12:30,333 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:12:30,334 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 86 [2021-01-06 16:12:30,339 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:12:30,341 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:12:30,343 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:12:30,345 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:12:30,347 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:12:30,349 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:12:30,353 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-01-06 16:12:30,388 INFO L625 ElimStorePlain]: treesize reduction 47, result has 33.8 percent of original size [2021-01-06 16:12:30,392 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:12:30,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:9 [2021-01-06 16:12:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:30,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:30,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-01-06 16:12:30,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63485871] [2021-01-06 16:12:30,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:12:30,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:12:30,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:12:30,425 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 18 states. [2021-01-06 16:12:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:31,664 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-01-06 16:12:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:12:31,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2021-01-06 16:12:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:31,666 INFO L225 Difference]: With dead ends: 63 [2021-01-06 16:12:31,666 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 16:12:31,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=359, Invalid=1201, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:12:31,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 16:12:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 26. [2021-01-06 16:12:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:12:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-01-06 16:12:31,677 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2021-01-06 16:12:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:31,677 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-01-06 16:12:31,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:12:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-01-06 16:12:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:12:31,678 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:31,678 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:31,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:31,886 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:31,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1013708501, now seen corresponding path program 3 times [2021-01-06 16:12:31,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:31,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718544174] [2021-01-06 16:12:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:32,111 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 16:12:32,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718544174] [2021-01-06 16:12:32,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929219550] [2021-01-06 16:12:32,112 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 16:12:32,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:12:32,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:32,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:12:32,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:32,252 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-01-06 16:12:32,254 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:12:32,266 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:12:32,267 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:12:32,268 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2021-01-06 16:12:32,518 INFO L348 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-01-06 16:12:32,518 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2021-01-06 16:12:32,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:12:32,532 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 16:12:32,564 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2021-01-06 16:12:32,568 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:12:32,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2021-01-06 16:12:32,579 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 16:12:32,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:32,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 18 [2021-01-06 16:12:32,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652080580] [2021-01-06 16:12:32,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:12:32,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:12:32,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:12:32,582 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 19 states. [2021-01-06 16:12:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:34,328 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-01-06 16:12:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:12:34,333 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 16:12:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:34,334 INFO L225 Difference]: With dead ends: 69 [2021-01-06 16:12:34,334 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:12:34,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=512, Invalid=1650, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:12:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:12:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 28. [2021-01-06 16:12:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:12:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 16:12:34,343 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2021-01-06 16:12:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:34,344 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 16:12:34,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:12:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 16:12:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:12:34,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:34,345 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:34,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:34,560 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:34,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2001461840, now seen corresponding path program 4 times [2021-01-06 16:12:34,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:34,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34047141] [2021-01-06 16:12:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:34,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34047141] [2021-01-06 16:12:34,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397332444] [2021-01-06 16:12:34,902 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 16:12:34,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:12:34,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:12:34,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:34,981 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-01-06 16:12:34,982 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:12:34,989 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:12:34,992 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:12:34,993 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:76 [2021-01-06 16:13:15,805 INFO L348 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2021-01-06 16:13:15,806 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 18 [2021-01-06 16:13:15,808 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:13:15,813 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:13:15,815 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:15,815 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:5 [2021-01-06 16:13:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:15,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:13:15,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 22 [2021-01-06 16:13:15,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981413700] [2021-01-06 16:13:15,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:13:15,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:13:15,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:13:15,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=371, Unknown=20, NotChecked=0, Total=462 [2021-01-06 16:13:15,869 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 22 states. [2021-01-06 16:13:30,176 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-01-06 16:13:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:13:33,475 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2021-01-06 16:13:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:13:33,476 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2021-01-06 16:13:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:13:33,477 INFO L225 Difference]: With dead ends: 75 [2021-01-06 16:13:33,477 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 16:13:33,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=704, Invalid=2356, Unknown=20, NotChecked=0, Total=3080 [2021-01-06 16:13:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 16:13:33,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 30. [2021-01-06 16:13:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:13:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 16:13:33,487 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2021-01-06 16:13:33,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:13:33,488 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 16:13:33,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:13:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 16:13:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:13:33,489 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:13:33,489 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:13:33,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:13:33,703 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:13:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:13:33,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2044648203, now seen corresponding path program 5 times [2021-01-06 16:13:33,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:13:33,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93452961] [2021-01-06 16:13:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:13:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:13:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:34,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93452961] [2021-01-06 16:13:34,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145384295] [2021-01-06 16:13:34,067 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 16:13:34,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:13:34,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:13:34,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:13:34,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:13:34,189 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-01-06 16:13:34,189 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:13:34,199 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:13:34,202 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:34,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2021-01-06 16:13:34,600 INFO L348 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-01-06 16:13:34,601 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2021-01-06 16:13:34,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:13:34,610 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 16:13:34,640 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2021-01-06 16:13:34,643 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:34,644 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2021-01-06 16:13:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:34,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:13:34,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-01-06 16:13:34,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140190297] [2021-01-06 16:13:34,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:13:34,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:13:34,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:13:34,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:13:34,678 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 23 states. [2021-01-06 16:13:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:13:37,690 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-01-06 16:13:37,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:13:37,691 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 16:13:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:13:37,692 INFO L225 Difference]: With dead ends: 81 [2021-01-06 16:13:37,692 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 16:13:37,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=929, Invalid=2977, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:13:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 16:13:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 32. [2021-01-06 16:13:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:13:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-01-06 16:13:37,702 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2021-01-06 16:13:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:13:37,703 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-01-06 16:13:37,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:13:37,703 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-01-06 16:13:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:13:37,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:13:37,704 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:13:37,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:13:37,920 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:13:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:13:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash -597070086, now seen corresponding path program 6 times [2021-01-06 16:13:37,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:13:37,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944584493] [2021-01-06 16:13:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:13:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:13:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:38,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944584493] [2021-01-06 16:13:38,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347659847] [2021-01-06 16:13:38,385 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 16:13:38,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:13:38,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:13:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:13:38,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:13:38,537 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-01-06 16:13:38,537 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:13:38,552 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:13:38,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:38,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-01-06 16:13:39,106 INFO L348 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-01-06 16:13:39,107 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 17 [2021-01-06 16:13:39,108 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:13:39,116 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:13:39,119 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:39,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:5 [2021-01-06 16:13:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:39,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:13:39,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2021-01-06 16:13:39,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501698587] [2021-01-06 16:13:39,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:13:39,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:13:39,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:13:39,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:13:39,168 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 26 states. [2021-01-06 16:13:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:13:43,003 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2021-01-06 16:13:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:13:43,004 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2021-01-06 16:13:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:13:43,004 INFO L225 Difference]: With dead ends: 85 [2021-01-06 16:13:43,004 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:13:43,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=831, Invalid=2475, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:13:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:13:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2021-01-06 16:13:43,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:13:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-01-06 16:13:43,015 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2021-01-06 16:13:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:13:43,016 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-01-06 16:13:43,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:13:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-01-06 16:13:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:13:43,017 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:13:43,017 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:13:43,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:13:43,218 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:13:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:13:43,219 INFO L82 PathProgramCache]: Analyzing trace with hash -237666758, now seen corresponding path program 2 times [2021-01-06 16:13:43,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:13:43,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446079829] [2021-01-06 16:13:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:13:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:13:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:43,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446079829] [2021-01-06 16:13:43,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001130244] [2021-01-06 16:13:43,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:13:43,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:13:43,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:13:43,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:13:43,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:13:43,748 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-01-06 16:13:43,749 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:13:43,760 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:13:43,761 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:43,761 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2021-01-06 16:13:44,225 INFO L348 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-01-06 16:13:44,226 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 17 [2021-01-06 16:13:44,232 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:13:44,240 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:13:44,242 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:44,242 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:5 [2021-01-06 16:13:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:44,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:13:44,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2021-01-06 16:13:44,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001983667] [2021-01-06 16:13:44,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:13:44,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:13:44,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:13:44,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:13:44,287 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 26 states. [2021-01-06 16:13:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:13:46,557 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-01-06 16:13:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:13:46,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2021-01-06 16:13:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:13:46,558 INFO L225 Difference]: With dead ends: 87 [2021-01-06 16:13:46,558 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 16:13:46,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:13:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 16:13:46,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 34. [2021-01-06 16:13:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 16:13:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-01-06 16:13:46,569 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2021-01-06 16:13:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:13:46,570 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-01-06 16:13:46,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:13:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-01-06 16:13:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:13:46,571 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:13:46,571 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:13:46,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 16:13:46,776 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:13:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:13:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1043903553, now seen corresponding path program 7 times [2021-01-06 16:13:46,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:13:46,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372793794] [2021-01-06 16:13:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:13:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:13:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:47,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372793794] [2021-01-06 16:13:47,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291980365] [2021-01-06 16:13:47,272 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 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 16:13:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:13:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:13:47,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:13:47,384 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-01-06 16:13:47,385 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:13:47,398 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:13:47,399 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:47,400 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2021-01-06 16:13:48,060 INFO L348 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-01-06 16:13:48,060 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2021-01-06 16:13:48,065 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:13:48,070 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 16:13:48,102 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2021-01-06 16:13:48,109 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:48,109 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2021-01-06 16:13:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:48,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:13:48,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 27 [2021-01-06 16:13:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015403473] [2021-01-06 16:13:48,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:13:48,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:13:48,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:13:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:13:48,161 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 28 states. [2021-01-06 16:13:52,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:13:52,630 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2021-01-06 16:13:52,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:13:52,631 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2021-01-06 16:13:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:13:52,632 INFO L225 Difference]: With dead ends: 91 [2021-01-06 16:13:52,632 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 16:13:52,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1018, Invalid=3014, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:13:52,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 16:13:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 39. [2021-01-06 16:13:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:13:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-01-06 16:13:52,646 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2021-01-06 16:13:52,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:13:52,646 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-01-06 16:13:52,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:13:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-01-06 16:13:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:13:52,647 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:13:52,647 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:13:52,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:13:52,852 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:13:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:13:52,853 INFO L82 PathProgramCache]: Analyzing trace with hash 745310975, now seen corresponding path program 3 times [2021-01-06 16:13:52,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:13:52,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451249640] [2021-01-06 16:13:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:13:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:13:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:53,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451249640] [2021-01-06 16:13:53,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706298789] [2021-01-06 16:13:53,347 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 16:13:53,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 16:13:53,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:13:53,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:13:53,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:13:53,490 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-01-06 16:13:53,492 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:13:53,504 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:13:53,505 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:53,505 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2021-01-06 16:13:54,089 INFO L348 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-01-06 16:13:54,089 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 17 [2021-01-06 16:13:54,091 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:13:54,098 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:13:54,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:54,099 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:5 [2021-01-06 16:13:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:54,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:13:54,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 27 [2021-01-06 16:13:54,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765492611] [2021-01-06 16:13:54,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:13:54,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:13:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:13:54,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:13:54,152 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 28 states. [2021-01-06 16:13:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:13:56,886 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-01-06 16:13:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:13:56,887 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2021-01-06 16:13:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:13:56,888 INFO L225 Difference]: With dead ends: 93 [2021-01-06 16:13:56,888 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 16:13:56,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=539, Invalid=1623, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:13:56,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 16:13:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 36. [2021-01-06 16:13:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:13:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 16:13:56,902 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2021-01-06 16:13:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:13:56,903 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 16:13:56,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:13:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 16:13:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:13:56,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:13:56,903 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:13:57,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:13:57,114 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:13:57,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:13:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash -954135740, now seen corresponding path program 8 times [2021-01-06 16:13:57,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:13:57,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782659155] [2021-01-06 16:13:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:13:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:13:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782659155] [2021-01-06 16:13:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415179306] [2021-01-06 16:13:57,645 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 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 16:13:57,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:13:57,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:13:57,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:13:57,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:13:57,753 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-01-06 16:13:57,754 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:13:57,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:13:57,766 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:57,767 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2021-01-06 16:13:58,497 INFO L348 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-01-06 16:13:58,498 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2021-01-06 16:13:58,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:13:58,502 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 16:13:58,536 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2021-01-06 16:13:58,539 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:13:58,539 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2021-01-06 16:13:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:13:58,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:13:58,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 29 [2021-01-06 16:13:58,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713831600] [2021-01-06 16:13:58,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:13:58,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:13:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:13:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:13:58,598 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 30 states. [2021-01-06 16:14:01,389 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-01-06 16:14:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:14:04,143 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-01-06 16:14:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:14:04,144 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2021-01-06 16:14:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:14:04,145 INFO L225 Difference]: With dead ends: 97 [2021-01-06 16:14:04,145 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 16:14:04,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1224, Invalid=3606, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:14:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 16:14:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 41. [2021-01-06 16:14:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:14:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-01-06 16:14:04,161 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2021-01-06 16:14:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:14:04,161 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-01-06 16:14:04,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:14:04,161 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-01-06 16:14:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:14:04,162 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:14:04,162 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:14:04,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:14:04,364 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:14:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:14:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash 494107268, now seen corresponding path program 4 times [2021-01-06 16:14:04,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:14:04,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906539290] [2021-01-06 16:14:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:14:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:14:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:14:04,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906539290] [2021-01-06 16:14:04,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045981225] [2021-01-06 16:14:04,908 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 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 16:14:04,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:14:04,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:14:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:14:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:14:04,991 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-01-06 16:14:04,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:14:05,001 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:14:05,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:14:05,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:59 [2021-01-06 16:15:49,579 INFO L348 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-01-06 16:15:49,580 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 19 [2021-01-06 16:15:49,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:15:49,596 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:15:49,599 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:15:49,599 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:66, output treesize:5 [2021-01-06 16:15:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:15:49,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:15:49,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 30 [2021-01-06 16:15:49,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416167497] [2021-01-06 16:15:49,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:15:49,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:15:49,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:15:49,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=673, Unknown=54, NotChecked=0, Total=870 [2021-01-06 16:15:49,688 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 30 states. [2021-01-06 16:15:57,183 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-01-06 16:15:59,615 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-01-06 16:16:00,411 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-01-06 16:16:02,033 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-01-06 16:16:02,993 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-01-06 16:16:04,030 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-01-06 16:16:05,095 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-01-06 16:16:06,453 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-01-06 16:16:09,129 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-01-06 16:16:11,409 WARN L197 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-01-06 16:16:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:16:11,781 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2021-01-06 16:16:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 16:16:11,783 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2021-01-06 16:16:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:16:11,784 INFO L225 Difference]: With dead ends: 99 [2021-01-06 16:16:11,784 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 16:16:11,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 121.2s TimeCoverageRelationStatistics Valid=1604, Invalid=5824, Unknown=54, NotChecked=0, Total=7482 [2021-01-06 16:16:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 16:16:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 38. [2021-01-06 16:16:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:16:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-01-06 16:16:11,810 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2021-01-06 16:16:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:16:11,810 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-01-06 16:16:11,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:16:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-01-06 16:16:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:16:11,811 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:16:11,811 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:16:12,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:16:12,027 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:16:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:16:12,028 INFO L82 PathProgramCache]: Analyzing trace with hash -586613367, now seen corresponding path program 9 times [2021-01-06 16:16:12,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:16:12,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381850090] [2021-01-06 16:16:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:16:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:16:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:16:12,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381850090] [2021-01-06 16:16:12,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774175736] [2021-01-06 16:16:12,912 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 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 16:16:13,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:16:13,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:16:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:16:13,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:16:13,567 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-01-06 16:16:13,569 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:16:13,601 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:16:13,606 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 16:16:13,607 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:79 [2021-01-06 16:16:15,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:16:15,864 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:16:15,865 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 18 [2021-01-06 16:16:15,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:16:15,899 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:16:15,905 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 16:16:15,906 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:86, output treesize:27 [2021-01-06 16:16:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:16:20,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:16:20,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-01-06 16:16:20,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591891549] [2021-01-06 16:16:20,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:16:20,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:16:20,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:16:20,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1164, Unknown=2, NotChecked=0, Total=1406 [2021-01-06 16:16:20,059 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 38 states. [2021-01-06 16:16:25,116 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-01-06 16:16:29,564 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-01-06 16:16:38,444 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-01-06 16:16:46,885 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-01-06 16:16:49,354 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61