/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-fpi/s4if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:30:31,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:30:31,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:30:31,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:30:31,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:30:31,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:30:31,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:30:31,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:30:31,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:30:31,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:30:31,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:30:31,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:30:31,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:30:31,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:30:31,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:30:31,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:30:31,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:30:31,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:30:31,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:30:31,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:30:31,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:30:31,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:30:31,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:30:31,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:30:31,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:30:31,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:30:31,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:30:31,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:30:31,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:30:31,623 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:30:31,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:30:31,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:30:31,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:30:31,628 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:30:31,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:30:31,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:30:31,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:30:31,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:30:31,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:30:31,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:30:31,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:30:31,631 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:30:31,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:30:31,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:30:31,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:30:31,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:30:31,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:30:31,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:30:31,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:30:31,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:30:31,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:30:31,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:30:31,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:30:31,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:30:31,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:30:32,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:30:32,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:30:32,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:30:32,066 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:30:32,067 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:30:32,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4if.c [2020-12-23 01:30:32,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/57eef9090/a69d5655ba9b4a92961dfca6b67f9cf9/FLAG5638f5716 [2020-12-23 01:30:32,820 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:30:32,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/s4if.c [2020-12-23 01:30:32,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/57eef9090/a69d5655ba9b4a92961dfca6b67f9cf9/FLAG5638f5716 [2020-12-23 01:30:32,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/57eef9090/a69d5655ba9b4a92961dfca6b67f9cf9 [2020-12-23 01:30:32,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:30:32,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:30:32,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:30:32,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:30:32,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:30:32,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:30:32" (1/1) ... [2020-12-23 01:30:32,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c08d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:32, skipping insertion in model container [2020-12-23 01:30:32,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:30:32" (1/1) ... [2020-12-23 01:30:32,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:30:32,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:30:33,033 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/s4if.c[587,600] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] [2020-12-23 01:30:33,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:30:33,064 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:30:33,078 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/s4if.c[587,600] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] [2020-12-23 01:30:33,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:30:33,104 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:30:33,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33 WrapperNode [2020-12-23 01:30:33,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:30:33,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:30:33,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:30:33,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:30:33,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (1/1) ... [2020-12-23 01:30:33,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (1/1) ... [2020-12-23 01:30:33,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:30:33,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:30:33,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:30:33,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:30:33,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (1/1) ... [2020-12-23 01:30:33,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (1/1) ... [2020-12-23 01:30:33,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (1/1) ... [2020-12-23 01:30:33,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (1/1) ... [2020-12-23 01:30:33,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (1/1) ... [2020-12-23 01:30:33,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (1/1) ... [2020-12-23 01:30:33,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (1/1) ... [2020-12-23 01:30:33,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:30:33,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:30:33,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:30:33,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:30:33,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:30:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:30:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:30:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:30:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 01:30:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:30:33,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:30:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:30:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:30:33,590 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:30:33,590 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 01:30:33,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:30:33 BoogieIcfgContainer [2020-12-23 01:30:33,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:30:33,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:30:33,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:30:33,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:30:33,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:30:32" (1/3) ... [2020-12-23 01:30:33,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4342e1fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:30:33, skipping insertion in model container [2020-12-23 01:30:33,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:33" (2/3) ... [2020-12-23 01:30:33,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4342e1fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:30:33, skipping insertion in model container [2020-12-23 01:30:33,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:30:33" (3/3) ... [2020-12-23 01:30:33,618 INFO L111 eAbstractionObserver]: Analyzing ICFG s4if.c [2020-12-23 01:30:33,636 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:30:33,643 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:30:33,686 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:30:33,752 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:30:33,753 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:30:33,753 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:30:33,753 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:30:33,753 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:30:33,753 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:30:33,753 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:30:33,753 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:30:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 01:30:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:30:33,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:33,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:33,781 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-12-23 01:30:33,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:33,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839081392] [2020-12-23 01:30:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:34,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839081392] [2020-12-23 01:30:34,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:30:34,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:30:34,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180445833] [2020-12-23 01:30:34,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:30:34,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:34,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:30:34,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:30:34,089 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 01:30:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:34,114 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-23 01:30:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:30:34,115 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 01:30:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:34,135 INFO L225 Difference]: With dead ends: 34 [2020-12-23 01:30:34,136 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 01:30:34,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:30:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 01:30:34,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 01:30:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 01:30:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-23 01:30:34,182 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-12-23 01:30:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:34,182 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-23 01:30:34,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:30:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-23 01:30:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:30:34,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:34,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:34,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:30:34,187 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-12-23 01:30:34,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:34,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855388054] [2020-12-23 01:30:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:34,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855388054] [2020-12-23 01:30:34,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:30:34,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:30:34,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550692368] [2020-12-23 01:30:34,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:30:34,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:34,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:30:34,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:30:34,281 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-12-23 01:30:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:34,366 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-23 01:30:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:30:34,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 01:30:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:34,368 INFO L225 Difference]: With dead ends: 28 [2020-12-23 01:30:34,368 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 01:30:34,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:30:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 01:30:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-12-23 01:30:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 01:30:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 01:30:34,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2020-12-23 01:30:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:34,378 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 01:30:34,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:30:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 01:30:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 01:30:34,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:34,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:34,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:30:34,384 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:34,384 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-12-23 01:30:34,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:34,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747520231] [2020-12-23 01:30:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:34,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747520231] [2020-12-23 01:30:34,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349702049] [2020-12-23 01:30:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:34,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 01:30:34,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:34,922 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:30:34,931 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:34,947 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:34,958 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:30:34,960 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:34,972 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:34,974 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:34,974 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2020-12-23 01:30:35,014 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:30:35,017 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:35,057 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:35,058 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:35,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-12-23 01:30:35,401 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:35,401 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-12-23 01:30:35,410 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:35,444 INFO L625 ElimStorePlain]: treesize reduction 28, result has 65.4 percent of original size [2020-12-23 01:30:35,463 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 01:30:35,464 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:53 [2020-12-23 01:30:35,642 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:30:35,652 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:30:35,654 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:35,660 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:35,668 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:30:35,670 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:30:35,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 01:30:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:35,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:35,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2020-12-23 01:30:35,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662760019] [2020-12-23 01:30:35,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:30:35,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:35,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:30:35,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:30:35,724 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 18 states. [2020-12-23 01:30:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:36,383 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-23 01:30:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:30:36,384 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2020-12-23 01:30:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:36,388 INFO L225 Difference]: With dead ends: 35 [2020-12-23 01:30:36,388 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 01:30:36,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:30:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 01:30:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-23 01:30:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 01:30:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-23 01:30:36,396 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-12-23 01:30:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:36,397 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-23 01:30:36,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:30:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-23 01:30:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 01:30:36,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:36,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:36,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 01:30:36,613 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:36,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:36,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2020-12-23 01:30:36,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:36,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192055076] [2020-12-23 01:30:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:36,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192055076] [2020-12-23 01:30:36,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045722321] [2020-12-23 01:30:36,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:36,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:30:36,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:30:36,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:36,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:36,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 01:30:36,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802800723] [2020-12-23 01:30:36,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:30:36,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:36,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:30:36,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:30:36,876 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-12-23 01:30:37,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:37,050 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-12-23 01:30:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:30:37,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 01:30:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:37,051 INFO L225 Difference]: With dead ends: 33 [2020-12-23 01:30:37,052 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 01:30:37,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:30:37,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 01:30:37,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-12-23 01:30:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 01:30:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 01:30:37,059 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-12-23 01:30:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:37,059 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 01:30:37,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:30:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 01:30:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:30:37,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:37,060 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:37,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:37,275 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:37,277 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2020-12-23 01:30:37,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:37,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687164368] [2020-12-23 01:30:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:37,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687164368] [2020-12-23 01:30:37,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308023608] [2020-12-23 01:30:37,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:37,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 01:30:37,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:37,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:30:37,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:37,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:37,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 01:30:37,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477935321] [2020-12-23 01:30:37,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:30:37,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:37,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:30:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:30:37,522 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 10 states. [2020-12-23 01:30:37,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:37,632 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-12-23 01:30:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:30:37,637 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-23 01:30:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:37,640 INFO L225 Difference]: With dead ends: 37 [2020-12-23 01:30:37,641 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 01:30:37,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:30:37,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 01:30:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-23 01:30:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 01:30:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 01:30:37,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-12-23 01:30:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:37,659 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 01:30:37,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:30:37,660 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 01:30:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:30:37,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:37,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:37,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:37,882 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:37,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2020-12-23 01:30:37,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:37,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447132734] [2020-12-23 01:30:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:38,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447132734] [2020-12-23 01:30:38,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118668439] [2020-12-23 01:30:38,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:38,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:30:38,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:38,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 01:30:38,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:38,782 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:30:38,784 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:38,790 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:38,795 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:30:38,796 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:38,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:38,803 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:38,803 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-23 01:30:38,833 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:30:38,835 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:38,843 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:38,844 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:38,844 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-23 01:30:38,922 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:38,923 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:30:38,927 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:38,960 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.3 percent of original size [2020-12-23 01:30:38,961 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:38,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2020-12-23 01:30:39,183 INFO L348 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-12-23 01:30:39,184 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 75 [2020-12-23 01:30:39,187 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:39,219 INFO L625 ElimStorePlain]: treesize reduction 22, result has 70.7 percent of original size [2020-12-23 01:30:39,221 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. [2020-12-23 01:30:39,221 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:53 [2020-12-23 01:30:39,435 INFO L348 Elim1Store]: treesize reduction 10, result has 87.3 percent of original size [2020-12-23 01:30:39,436 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 131 [2020-12-23 01:30:39,440 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:39,461 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:39,476 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 01:30:39,477 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:89, output treesize:56 [2020-12-23 01:30:39,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:30:39,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:30:39,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:39,576 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:39,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:30:39,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 01:30:39,595 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 01:30:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:39,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:39,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-12-23 01:30:39,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023183935] [2020-12-23 01:30:39,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:30:39,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:39,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:30:39,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:30:39,639 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 25 states. [2020-12-23 01:30:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:40,662 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 01:30:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:30:40,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 21 [2020-12-23 01:30:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:40,666 INFO L225 Difference]: With dead ends: 46 [2020-12-23 01:30:40,666 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 01:30:40,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 01:30:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 01:30:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-12-23 01:30:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 01:30:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-23 01:30:40,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 21 [2020-12-23 01:30:40,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:40,675 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-23 01:30:40,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:30:40,675 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-23 01:30:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:30:40,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:40,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:40,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:40,892 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:40,892 INFO L82 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2020-12-23 01:30:40,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:40,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708705325] [2020-12-23 01:30:40,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:40,912 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:30:40,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342971425] [2020-12-23 01:30:40,912 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:40,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:30:40,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:41,010 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:30:41,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:41,016 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:41,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:41,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 01:30:41,047 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 01:30:41,047 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:41,052 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:41,053 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:41,053 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-23 01:30:41,111 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:41,111 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2020-12-23 01:30:41,113 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:41,126 INFO L625 ElimStorePlain]: treesize reduction 24, result has 41.5 percent of original size [2020-12-23 01:30:41,129 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:41,130 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:13 [2020-12-23 01:30:41,171 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-23 01:30:41,172 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:41,173 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:41,174 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:41,174 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-23 01:30:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:41,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708705325] [2020-12-23 01:30:41,187 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:30:41,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342971425] [2020-12-23 01:30:41,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:30:41,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 01:30:41,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477591879] [2020-12-23 01:30:41,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:30:41,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:41,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:30:41,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:30:41,190 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 9 states. [2020-12-23 01:30:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:41,318 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-12-23 01:30:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:30:41,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-23 01:30:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:41,320 INFO L225 Difference]: With dead ends: 41 [2020-12-23 01:30:41,320 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 01:30:41,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:30:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 01:30:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-23 01:30:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 01:30:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 01:30:41,327 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2020-12-23 01:30:41,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:41,328 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 01:30:41,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:30:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 01:30:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:30:41,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:41,329 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:41,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 01:30:41,545 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2020-12-23 01:30:41,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:41,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314584096] [2020-12-23 01:30:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:41,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314584096] [2020-12-23 01:30:41,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133482022] [2020-12-23 01:30:41,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:41,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 01:30:41,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:30:41,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:41,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:41,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 01:30:41,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163834069] [2020-12-23 01:30:41,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:30:41,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:41,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:30:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:30:41,819 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 13 states. [2020-12-23 01:30:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:42,081 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-23 01:30:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:30:42,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-12-23 01:30:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:42,083 INFO L225 Difference]: With dead ends: 41 [2020-12-23 01:30:42,083 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 01:30:42,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:30:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 01:30:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-12-23 01:30:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 01:30:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-23 01:30:42,093 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2020-12-23 01:30:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:42,093 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-23 01:30:42,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:30:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-23 01:30:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:30:42,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:42,094 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:42,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:42,303 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:42,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1038837147, now seen corresponding path program 6 times [2020-12-23 01:30:42,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:42,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893545056] [2020-12-23 01:30:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:42,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893545056] [2020-12-23 01:30:42,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006060965] [2020-12-23 01:30:42,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:42,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 01:30:42,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:42,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:30:42,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:42,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:42,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 01:30:42,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587568226] [2020-12-23 01:30:42,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:30:42,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:30:42,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:30:42,539 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 13 states. [2020-12-23 01:30:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:42,692 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-23 01:30:42,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:30:42,693 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-23 01:30:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:42,694 INFO L225 Difference]: With dead ends: 45 [2020-12-23 01:30:42,694 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 01:30:42,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:30:42,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 01:30:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-23 01:30:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 01:30:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 01:30:42,701 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2020-12-23 01:30:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:42,701 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 01:30:42,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:30:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 01:30:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 01:30:42,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:42,702 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:42,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:42,916 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 7 times [2020-12-23 01:30:42,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:42,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222041552] [2020-12-23 01:30:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222041552] [2020-12-23 01:30:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048098779] [2020-12-23 01:30:43,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:44,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 01:30:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:44,167 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 11 treesize of output 7 [2020-12-23 01:30:44,167 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:44,177 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:44,178 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:44,178 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:30:44,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:44,231 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:30:44,233 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:44,247 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:44,248 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:44,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 01:30:44,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:44,359 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:44,359 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:30:44,365 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:44,400 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2020-12-23 01:30:44,401 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:44,401 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-12-23 01:30:44,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:44,563 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2020-12-23 01:30:44,564 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2020-12-23 01:30:44,568 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:44,619 INFO L625 ElimStorePlain]: treesize reduction 20, result has 72.2 percent of original size [2020-12-23 01:30:44,620 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:44,620 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2020-12-23 01:30:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:44,939 INFO L348 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2020-12-23 01:30:44,940 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2020-12-23 01:30:44,942 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:44,962 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:44,963 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. [2020-12-23 01:30:44,963 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:55 [2020-12-23 01:30:45,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:45,191 INFO L348 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2020-12-23 01:30:45,191 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2020-12-23 01:30:45,195 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:45,245 INFO L625 ElimStorePlain]: treesize reduction 22, result has 74.7 percent of original size [2020-12-23 01:30:45,248 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. [2020-12-23 01:30:45,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:65 [2020-12-23 01:30:45,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:45,569 INFO L348 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2020-12-23 01:30:45,570 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 173 [2020-12-23 01:30:45,575 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:45,637 INFO L625 ElimStorePlain]: treesize reduction 48, result has 61.3 percent of original size [2020-12-23 01:30:45,645 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 01:30:45,646 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:76 [2020-12-23 01:30:45,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:30:45,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:30:45,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:45,793 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:45,803 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:30:45,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 01:30:45,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-23 01:30:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:45,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:45,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2020-12-23 01:30:45,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956360004] [2020-12-23 01:30:45,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 01:30:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:45,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 01:30:45,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 01:30:45,874 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 35 states. [2020-12-23 01:30:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:48,019 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-12-23 01:30:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:30:48,021 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 26 [2020-12-23 01:30:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:48,022 INFO L225 Difference]: With dead ends: 57 [2020-12-23 01:30:48,022 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 01:30:48,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=365, Invalid=2605, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 01:30:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 01:30:48,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-12-23 01:30:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 01:30:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-23 01:30:48,033 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2020-12-23 01:30:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:48,033 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-23 01:30:48,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 01:30:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-23 01:30:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 01:30:48,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:48,034 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:48,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 01:30:48,248 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:48,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 2 times [2020-12-23 01:30:48,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:48,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759527227] [2020-12-23 01:30:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:48,259 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:30:48,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958171245] [2020-12-23 01:30:48,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:48,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:30:48,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 01:30:48,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:48,394 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 13 treesize of output 9 [2020-12-23 01:30:48,394 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:48,399 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:48,400 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:48,400 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 01:30:48,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:48,440 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:48,441 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2020-12-23 01:30:48,443 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:48,456 INFO L625 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2020-12-23 01:30:48,457 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:48,457 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:18 [2020-12-23 01:30:48,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:48,489 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:48,489 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2020-12-23 01:30:48,491 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:48,506 INFO L625 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2020-12-23 01:30:48,508 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:48,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2020-12-23 01:30:48,546 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-23 01:30:48,547 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:48,548 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:48,549 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:48,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-23 01:30:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:48,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759527227] [2020-12-23 01:30:48,569 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:30:48,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958171245] [2020-12-23 01:30:48,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:30:48,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 01:30:48,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635419158] [2020-12-23 01:30:48,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:30:48,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:48,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:30:48,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:30:48,570 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 11 states. [2020-12-23 01:30:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:48,772 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-12-23 01:30:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:30:48,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-12-23 01:30:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:48,774 INFO L225 Difference]: With dead ends: 49 [2020-12-23 01:30:48,774 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 01:30:48,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:30:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 01:30:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-23 01:30:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 01:30:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-23 01:30:48,782 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 26 [2020-12-23 01:30:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:48,783 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-23 01:30:48,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:30:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-23 01:30:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 01:30:48,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:48,784 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:48,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:48,987 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:48,988 INFO L82 PathProgramCache]: Analyzing trace with hash 640571873, now seen corresponding path program 8 times [2020-12-23 01:30:48,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:48,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040266136] [2020-12-23 01:30:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:49,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040266136] [2020-12-23 01:30:49,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151567826] [2020-12-23 01:30:49,090 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:49,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:30:49,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:49,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:30:49,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:49,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:49,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 01:30:49,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364265918] [2020-12-23 01:30:49,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:30:49,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:49,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:30:49,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:30:49,254 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 16 states. [2020-12-23 01:30:49,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:49,645 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-12-23 01:30:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:30:49,646 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-12-23 01:30:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:49,649 INFO L225 Difference]: With dead ends: 49 [2020-12-23 01:30:49,649 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 01:30:49,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:30:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 01:30:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2020-12-23 01:30:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 01:30:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-23 01:30:49,665 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-12-23 01:30:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:49,665 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-23 01:30:49,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:30:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-23 01:30:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:30:49,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:49,667 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:49,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:49,880 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:49,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1478838205, now seen corresponding path program 9 times [2020-12-23 01:30:49,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:49,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690568304] [2020-12-23 01:30:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:49,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690568304] [2020-12-23 01:30:49,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143301745] [2020-12-23 01:30:49,978 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:50,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 01:30:50,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:50,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:30:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:50,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:50,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 01:30:50,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146637840] [2020-12-23 01:30:50,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:30:50,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:50,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:30:50,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:30:50,165 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2020-12-23 01:30:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:50,335 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-12-23 01:30:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:30:50,336 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-12-23 01:30:50,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:50,336 INFO L225 Difference]: With dead ends: 53 [2020-12-23 01:30:50,336 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 01:30:50,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:30:50,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 01:30:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-12-23 01:30:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 01:30:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 01:30:50,344 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-12-23 01:30:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:50,344 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 01:30:50,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:30:50,345 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 01:30:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:30:50,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:50,345 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:50,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:30:50,560 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:50,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2018974843, now seen corresponding path program 10 times [2020-12-23 01:30:50,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:50,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046936686] [2020-12-23 01:30:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:51,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046936686] [2020-12-23 01:30:51,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956788371] [2020-12-23 01:30:51,291 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 [2020-12-23 01:30:51,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:30:51,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:51,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 01:30:51,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:51,380 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:30:51,382 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:51,390 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:51,393 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:30:51,394 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:51,400 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:51,400 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:51,401 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-23 01:30:51,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:51,413 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:30:51,415 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:51,425 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:51,425 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:51,426 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2020-12-23 01:30:51,538 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:51,539 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:30:51,541 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:51,569 INFO L625 ElimStorePlain]: treesize reduction 20, result has 62.3 percent of original size [2020-12-23 01:30:51,570 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:51,570 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-23 01:30:51,734 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2020-12-23 01:30:51,735 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2020-12-23 01:30:51,738 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:51,776 INFO L625 ElimStorePlain]: treesize reduction 20, result has 69.2 percent of original size [2020-12-23 01:30:51,777 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:51,777 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2020-12-23 01:30:51,999 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2020-12-23 01:30:52,000 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2020-12-23 01:30:52,003 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:52,072 INFO L625 ElimStorePlain]: treesize reduction 64, result has 45.8 percent of original size [2020-12-23 01:30:52,073 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:52,073 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2020-12-23 01:30:52,497 INFO L348 Elim1Store]: treesize reduction 66, result has 45.5 percent of original size [2020-12-23 01:30:52,498 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 127 [2020-12-23 01:30:52,501 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:52,549 INFO L625 ElimStorePlain]: treesize reduction 20, result has 77.0 percent of original size [2020-12-23 01:30:52,550 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. [2020-12-23 01:30:52,550 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:67 [2020-12-23 01:30:52,830 INFO L348 Elim1Store]: treesize reduction 66, result has 45.5 percent of original size [2020-12-23 01:30:52,831 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 127 [2020-12-23 01:30:52,834 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:52,890 INFO L625 ElimStorePlain]: treesize reduction 46, result has 61.3 percent of original size [2020-12-23 01:30:52,891 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. [2020-12-23 01:30:52,892 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:73 [2020-12-23 01:30:53,336 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-12-23 01:30:53,336 INFO L348 Elim1Store]: treesize reduction 66, result has 65.4 percent of original size [2020-12-23 01:30:53,337 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 213 [2020-12-23 01:30:53,355 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:53,427 INFO L625 ElimStorePlain]: treesize reduction 70, result has 54.5 percent of original size [2020-12-23 01:30:53,431 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. [2020-12-23 01:30:53,432 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:109, output treesize:84 [2020-12-23 01:30:53,969 WARN L197 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 01:30:54,644 WARN L197 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-23 01:30:54,926 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2020-12-23 01:30:54,927 INFO L348 Elim1Store]: treesize reduction 66, result has 76.2 percent of original size [2020-12-23 01:30:54,928 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 110 treesize of output 313 [2020-12-23 01:30:54,937 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:55,027 INFO L625 ElimStorePlain]: treesize reduction 72, result has 55.8 percent of original size [2020-12-23 01:30:55,038 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 01:30:55,038 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:120, output treesize:91 [2020-12-23 01:30:55,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:55,207 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:55,210 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:55,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:30:55,223 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:55,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 01:30:55,236 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2020-12-23 01:30:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:55,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:55,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2020-12-23 01:30:55,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929123358] [2020-12-23 01:30:55,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 01:30:55,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:55,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 01:30:55,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:30:55,311 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 40 states. [2020-12-23 01:30:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:56,762 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-12-23 01:30:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:30:56,762 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 31 [2020-12-23 01:30:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:56,763 INFO L225 Difference]: With dead ends: 68 [2020-12-23 01:30:56,763 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 01:30:56,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 01:30:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 01:30:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-12-23 01:30:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 01:30:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 01:30:56,775 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2020-12-23 01:30:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:56,775 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 01:30:56,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 01:30:56,776 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 01:30:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:30:56,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:56,776 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:56,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:30:56,992 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1961716541, now seen corresponding path program 3 times [2020-12-23 01:30:56,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:56,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471560161] [2020-12-23 01:30:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:57,003 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:30:57,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402446712] [2020-12-23 01:30:57,003 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 [2020-12-23 01:30:57,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 01:30:57,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:57,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:30:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:57,101 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 15 treesize of output 11 [2020-12-23 01:30:57,102 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:57,110 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:57,111 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:57,111 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-23 01:30:57,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:57,190 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:57,190 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2020-12-23 01:30:57,192 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:57,216 INFO L625 ElimStorePlain]: treesize reduction 28, result has 47.2 percent of original size [2020-12-23 01:30:57,217 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:30:57,218 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2020-12-23 01:30:57,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:57,241 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:57,242 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2020-12-23 01:30:57,244 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:57,263 INFO L625 ElimStorePlain]: treesize reduction 28, result has 47.2 percent of original size [2020-12-23 01:30:57,264 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:30:57,265 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2020-12-23 01:30:57,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:30:57,292 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:57,293 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2020-12-23 01:30:57,295 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:30:57,316 INFO L625 ElimStorePlain]: treesize reduction 28, result has 47.2 percent of original size [2020-12-23 01:30:57,318 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:30:57,318 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:20 [2020-12-23 01:30:57,348 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:57,349 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 23 treesize of output 23 [2020-12-23 01:30:57,350 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 01:30:57,363 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:30:57,364 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:30:57,369 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:30:57,370 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:18 [2020-12-23 01:30:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 01:30:57,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471560161] [2020-12-23 01:30:57,425 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:30:57,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402446712] [2020-12-23 01:30:57,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:30:57,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 01:30:57,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131495422] [2020-12-23 01:30:57,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:30:57,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:57,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:30:57,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:30:57,427 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2020-12-23 01:30:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:57,699 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-23 01:30:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:30:57,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-12-23 01:30:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:57,701 INFO L225 Difference]: With dead ends: 54 [2020-12-23 01:30:57,701 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 01:30:57,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:30:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 01:30:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-12-23 01:30:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 01:30:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 01:30:57,712 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2020-12-23 01:30:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:57,712 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 01:30:57,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:30:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 01:30:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 01:30:57,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:57,713 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:57,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 01:30:57,928 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:57,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1399241145, now seen corresponding path program 11 times [2020-12-23 01:30:57,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:57,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134200561] [2020-12-23 01:30:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:58,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134200561] [2020-12-23 01:30:58,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256628685] [2020-12-23 01:30:58,098 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:58,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:30:58,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:58,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:30:58,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:58,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:58,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-23 01:30:58,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898646343] [2020-12-23 01:30:58,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:30:58,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:58,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:30:58,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:30:58,338 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 19 states. [2020-12-23 01:30:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:58,754 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-12-23 01:30:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:30:58,754 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2020-12-23 01:30:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:58,755 INFO L225 Difference]: With dead ends: 62 [2020-12-23 01:30:58,755 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 01:30:58,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:30:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 01:30:58,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2020-12-23 01:30:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 01:30:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-12-23 01:30:58,774 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 33 [2020-12-23 01:30:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:58,776 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-12-23 01:30:58,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:30:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-12-23 01:30:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 01:30:58,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:58,780 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:58,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:58,994 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:58,995 INFO L82 PathProgramCache]: Analyzing trace with hash 981485409, now seen corresponding path program 12 times [2020-12-23 01:30:58,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:58,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783821235] [2020-12-23 01:30:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:59,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783821235] [2020-12-23 01:30:59,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171784452] [2020-12-23 01:30:59,146 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:30:59,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 01:30:59,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:30:59,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:30:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:30:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:59,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:30:59,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-23 01:30:59,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409358947] [2020-12-23 01:30:59,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:30:59,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:59,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:30:59,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:30:59,394 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 19 states. [2020-12-23 01:30:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:59,641 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-12-23 01:30:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:30:59,642 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-12-23 01:30:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:59,643 INFO L225 Difference]: With dead ends: 66 [2020-12-23 01:30:59,643 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 01:30:59,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:30:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 01:30:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-12-23 01:30:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 01:30:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-23 01:30:59,658 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 34 [2020-12-23 01:30:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:59,658 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-23 01:30:59,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:30:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-23 01:30:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 01:30:59,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:59,659 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:59,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:30:59,873 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:59,874 INFO L82 PathProgramCache]: Analyzing trace with hash -596322977, now seen corresponding path program 13 times [2020-12-23 01:30:59,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:59,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947717041] [2020-12-23 01:30:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:00,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947717041] [2020-12-23 01:31:00,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273107430] [2020-12-23 01:31:00,926 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:00,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 01:31:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:01,083 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 11 treesize of output 7 [2020-12-23 01:31:01,085 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:01,093 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:01,094 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:01,094 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:31:01,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:01,156 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:31:01,157 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:01,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:01,170 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:01,170 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 01:31:01,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:01,322 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:01,323 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:31:01,325 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:01,371 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2020-12-23 01:31:01,372 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:01,372 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-12-23 01:31:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:01,612 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2020-12-23 01:31:01,613 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2020-12-23 01:31:01,619 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:01,663 INFO L625 ElimStorePlain]: treesize reduction 20, result has 71.0 percent of original size [2020-12-23 01:31:01,664 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:01,665 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2020-12-23 01:31:01,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:01,975 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-23 01:31:01,976 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2020-12-23 01:31:01,977 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2020-12-23 01:31:01,980 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:02,054 INFO L625 ElimStorePlain]: treesize reduction 64, result has 46.2 percent of original size [2020-12-23 01:31:02,055 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:02,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:55 [2020-12-23 01:31:02,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:02,426 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-12-23 01:31:02,427 INFO L348 Elim1Store]: treesize reduction 114, result has 51.7 percent of original size [2020-12-23 01:31:02,428 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 155 [2020-12-23 01:31:02,432 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:02,530 INFO L625 ElimStorePlain]: treesize reduction 64, result has 52.2 percent of original size [2020-12-23 01:31:02,531 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:02,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:70 [2020-12-23 01:31:03,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:03,112 INFO L348 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2020-12-23 01:31:03,112 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 153 [2020-12-23 01:31:03,117 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:03,147 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:03,148 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. [2020-12-23 01:31:03,149 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:98, output treesize:73 [2020-12-23 01:31:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:03,538 INFO L348 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2020-12-23 01:31:03,538 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 153 [2020-12-23 01:31:03,542 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:03,575 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:03,576 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. [2020-12-23 01:31:03,577 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:98, output treesize:73 [2020-12-23 01:31:03,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:03,951 INFO L348 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2020-12-23 01:31:03,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 153 [2020-12-23 01:31:03,955 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:03,989 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:03,991 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. [2020-12-23 01:31:03,991 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:98, output treesize:73 [2020-12-23 01:31:04,490 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-23 01:31:04,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:04,774 INFO L348 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2020-12-23 01:31:04,775 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 153 [2020-12-23 01:31:04,783 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:04,860 INFO L625 ElimStorePlain]: treesize reduction 94, result has 46.9 percent of original size [2020-12-23 01:31:04,862 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. [2020-12-23 01:31:04,862 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:98, output treesize:83 [2020-12-23 01:31:05,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:05,437 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2020-12-23 01:31:05,437 INFO L348 Elim1Store]: treesize reduction 112, result has 57.7 percent of original size [2020-12-23 01:31:05,438 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 108 treesize of output 253 [2020-12-23 01:31:05,453 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:05,542 INFO L625 ElimStorePlain]: treesize reduction 83, result has 56.8 percent of original size [2020-12-23 01:31:05,546 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:05,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:119, output treesize:109 [2020-12-23 01:31:05,740 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:05,742 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:05,745 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:05,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:31:05,757 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:05,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 01:31:05,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2020-12-23 01:31:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:05,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:05,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2020-12-23 01:31:05,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859103138] [2020-12-23 01:31:05,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 01:31:05,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:05,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 01:31:05,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2366, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 01:31:05,862 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 51 states. [2020-12-23 01:31:07,809 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-12-23 01:31:07,981 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-23 01:31:09,264 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-23 01:31:09,826 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-23 01:31:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:10,915 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-12-23 01:31:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 01:31:10,916 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 36 [2020-12-23 01:31:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:10,917 INFO L225 Difference]: With dead ends: 79 [2020-12-23 01:31:10,917 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 01:31:10,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=477, Invalid=6003, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 01:31:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 01:31:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-12-23 01:31:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 01:31:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-12-23 01:31:10,929 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 36 [2020-12-23 01:31:10,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:10,930 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-12-23 01:31:10,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 01:31:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-12-23 01:31:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 01:31:10,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:10,930 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:11,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 01:31:11,144 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash 83735393, now seen corresponding path program 4 times [2020-12-23 01:31:11,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:11,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946674393] [2020-12-23 01:31:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:11,159 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:31:11,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080737022] [2020-12-23 01:31:11,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:11,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:31:11,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:11,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 01:31:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:11,226 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:31:11,227 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:11,231 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:11,232 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:11,232 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 01:31:11,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 01:31:11,278 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:11,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:11,287 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:11,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:31:11,339 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:11,339 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:31:11,341 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:11,365 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2020-12-23 01:31:11,367 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. [2020-12-23 01:31:11,367 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2020-12-23 01:31:11,855 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:11,855 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2020-12-23 01:31:11,857 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:11,884 INFO L625 ElimStorePlain]: treesize reduction 76, result has 29.0 percent of original size [2020-12-23 01:31:11,886 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. [2020-12-23 01:31:11,886 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2020-12-23 01:31:11,963 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:11,963 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2020-12-23 01:31:11,965 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:11,991 INFO L625 ElimStorePlain]: treesize reduction 76, result has 29.0 percent of original size [2020-12-23 01:31:11,993 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. [2020-12-23 01:31:11,993 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2020-12-23 01:31:12,064 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:12,065 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2020-12-23 01:31:12,069 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:12,097 INFO L625 ElimStorePlain]: treesize reduction 76, result has 29.0 percent of original size [2020-12-23 01:31:12,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:12,099 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2020-12-23 01:31:12,207 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:12,208 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 30 treesize of output 24 [2020-12-23 01:31:12,209 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:12,213 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:12,214 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:12,215 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2020-12-23 01:31:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:31:12,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946674393] [2020-12-23 01:31:12,246 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:31:12,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080737022] [2020-12-23 01:31:12,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:31:12,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 01:31:12,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662506416] [2020-12-23 01:31:12,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:31:12,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:31:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2020-12-23 01:31:12,248 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 15 states. [2020-12-23 01:31:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:13,238 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-12-23 01:31:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:31:13,239 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-12-23 01:31:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:13,239 INFO L225 Difference]: With dead ends: 64 [2020-12-23 01:31:13,239 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 01:31:13,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=252, Unknown=1, NotChecked=0, Total=306 [2020-12-23 01:31:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 01:31:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-23 01:31:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 01:31:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-12-23 01:31:13,251 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 36 [2020-12-23 01:31:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:13,252 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-12-23 01:31:13,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:31:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-12-23 01:31:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 01:31:13,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:13,253 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:13,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:13,466 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:13,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:13,467 INFO L82 PathProgramCache]: Analyzing trace with hash -746726435, now seen corresponding path program 14 times [2020-12-23 01:31:13,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:13,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787051232] [2020-12-23 01:31:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:13,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787051232] [2020-12-23 01:31:13,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820965007] [2020-12-23 01:31:13,627 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:13,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:31:13,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:31:13,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:13,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:13,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-23 01:31:13,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741204097] [2020-12-23 01:31:13,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:31:13,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:13,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:31:13,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:31:13,869 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 22 states. [2020-12-23 01:31:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:14,510 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-12-23 01:31:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:31:14,517 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-12-23 01:31:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:14,518 INFO L225 Difference]: With dead ends: 70 [2020-12-23 01:31:14,518 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 01:31:14,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 01:31:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 01:31:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2020-12-23 01:31:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 01:31:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-12-23 01:31:14,529 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 38 [2020-12-23 01:31:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:14,530 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-12-23 01:31:14,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:31:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-12-23 01:31:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 01:31:14,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:14,530 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:14,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:14,745 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:14,746 INFO L82 PathProgramCache]: Analyzing trace with hash 465948487, now seen corresponding path program 15 times [2020-12-23 01:31:14,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:14,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500219948] [2020-12-23 01:31:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:14,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500219948] [2020-12-23 01:31:14,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424473396] [2020-12-23 01:31:14,894 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:15,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 01:31:15,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:15,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:31:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:15,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:15,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-23 01:31:15,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036495184] [2020-12-23 01:31:15,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:31:15,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:31:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:31:15,217 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 22 states. [2020-12-23 01:31:15,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:15,492 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-12-23 01:31:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:31:15,492 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-12-23 01:31:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:15,493 INFO L225 Difference]: With dead ends: 74 [2020-12-23 01:31:15,493 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 01:31:15,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:31:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 01:31:15,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-12-23 01:31:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 01:31:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-23 01:31:15,503 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2020-12-23 01:31:15,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:15,504 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-23 01:31:15,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:31:15,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-23 01:31:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 01:31:15,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:15,504 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:15,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:15,719 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash -552579063, now seen corresponding path program 16 times [2020-12-23 01:31:15,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:15,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114280598] [2020-12-23 01:31:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:17,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114280598] [2020-12-23 01:31:17,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147880190] [2020-12-23 01:31:17,081 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:17,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:31:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:17,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 01:31:17,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:17,151 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:31:17,153 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:17,161 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:17,165 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:31:17,165 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:17,173 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:17,173 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:17,174 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-23 01:31:17,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:17,191 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:31:17,192 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:17,202 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:17,203 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:17,203 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2020-12-23 01:31:17,337 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:17,338 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:31:17,340 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:17,374 INFO L625 ElimStorePlain]: treesize reduction 20, result has 62.3 percent of original size [2020-12-23 01:31:17,374 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:17,375 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-23 01:31:17,593 INFO L348 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2020-12-23 01:31:17,594 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2020-12-23 01:31:17,596 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:17,643 INFO L625 ElimStorePlain]: treesize reduction 42, result has 50.0 percent of original size [2020-12-23 01:31:17,644 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:17,644 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2020-12-23 01:31:17,933 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2020-12-23 01:31:17,934 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2020-12-23 01:31:17,939 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:18,010 INFO L625 ElimStorePlain]: treesize reduction 64, result has 44.3 percent of original size [2020-12-23 01:31:18,011 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:18,011 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2020-12-23 01:31:18,364 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-12-23 01:31:18,365 INFO L348 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2020-12-23 01:31:18,366 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2020-12-23 01:31:18,370 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:18,457 INFO L625 ElimStorePlain]: treesize reduction 86, result has 41.1 percent of original size [2020-12-23 01:31:18,458 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:18,458 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:60 [2020-12-23 01:31:18,885 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-12-23 01:31:18,886 INFO L348 Elim1Store]: treesize reduction 163, result has 49.7 percent of original size [2020-12-23 01:31:18,887 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 197 [2020-12-23 01:31:18,893 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:19,001 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-23 01:31:19,001 INFO L625 ElimStorePlain]: treesize reduction 86, result has 46.6 percent of original size [2020-12-23 01:31:19,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:19,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:79, output treesize:75 [2020-12-23 01:31:19,699 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-23 01:31:19,699 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2020-12-23 01:31:19,700 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2020-12-23 01:31:19,705 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:19,746 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:19,747 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. [2020-12-23 01:31:19,748 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:81 [2020-12-23 01:31:20,208 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2020-12-23 01:31:20,209 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2020-12-23 01:31:20,213 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:20,305 INFO L625 ElimStorePlain]: treesize reduction 118, result has 43.5 percent of original size [2020-12-23 01:31:20,306 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. [2020-12-23 01:31:20,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:91 [2020-12-23 01:31:20,973 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2020-12-23 01:31:20,974 INFO L348 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2020-12-23 01:31:20,975 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 293 [2020-12-23 01:31:20,985 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:21,034 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:21,035 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. [2020-12-23 01:31:21,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:127, output treesize:92 [2020-12-23 01:31:21,980 WARN L197 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-23 01:31:22,265 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2020-12-23 01:31:22,266 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2020-12-23 01:31:22,271 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:22,351 INFO L625 ElimStorePlain]: treesize reduction 22, result has 79.8 percent of original size [2020-12-23 01:31:22,353 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. [2020-12-23 01:31:22,353 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:87 [2020-12-23 01:31:22,895 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-23 01:31:22,896 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2020-12-23 01:31:22,896 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2020-12-23 01:31:22,901 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:22,991 INFO L625 ElimStorePlain]: treesize reduction 96, result has 48.7 percent of original size [2020-12-23 01:31:22,993 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. [2020-12-23 01:31:22,993 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:91 [2020-12-23 01:31:23,695 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2020-12-23 01:31:23,696 INFO L348 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2020-12-23 01:31:23,696 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 293 [2020-12-23 01:31:23,705 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:23,801 INFO L625 ElimStorePlain]: treesize reduction 64, result has 60.5 percent of original size [2020-12-23 01:31:23,804 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:23,805 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:127, output treesize:98 [2020-12-23 01:31:24,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:24,009 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:24,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:24,013 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:31:24,020 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:24,023 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-23 01:31:24,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2020-12-23 01:31:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:24,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:24,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 56 [2020-12-23 01:31:24,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231906231] [2020-12-23 01:31:24,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 01:31:24,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:24,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 01:31:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2900, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 01:31:24,166 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 56 states. [2020-12-23 01:31:25,797 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-23 01:31:26,231 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-23 01:31:26,620 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-23 01:31:26,979 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-23 01:31:27,380 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-23 01:31:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:28,197 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2020-12-23 01:31:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 01:31:28,198 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 41 [2020-12-23 01:31:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:28,199 INFO L225 Difference]: With dead ends: 90 [2020-12-23 01:31:28,199 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 01:31:28,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=261, Invalid=4029, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 01:31:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 01:31:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-12-23 01:31:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 01:31:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-12-23 01:31:28,215 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 41 [2020-12-23 01:31:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:28,215 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-12-23 01:31:28,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 01:31:28,215 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-12-23 01:31:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 01:31:28,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:28,216 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:28,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 01:31:28,432 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:28,433 INFO L82 PathProgramCache]: Analyzing trace with hash 127479307, now seen corresponding path program 5 times [2020-12-23 01:31:28,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:28,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292048262] [2020-12-23 01:31:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:28,445 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:31:28,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783805996] [2020-12-23 01:31:28,446 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:28,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 01:31:28,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:28,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 01:31:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:28,630 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:31:28,632 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:28,637 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:28,638 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:28,638 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 01:31:28,710 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 01:31:28,711 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:28,720 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:28,721 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:28,721 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:31:28,787 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:28,787 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:31:28,789 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:28,820 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2020-12-23 01:31:28,822 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. [2020-12-23 01:31:28,822 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2020-12-23 01:31:28,932 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:28,933 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2020-12-23 01:31:28,936 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:28,963 INFO L625 ElimStorePlain]: treesize reduction 44, result has 41.3 percent of original size [2020-12-23 01:31:28,965 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. [2020-12-23 01:31:28,965 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2020-12-23 01:31:29,057 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:29,058 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2020-12-23 01:31:29,060 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:29,095 INFO L625 ElimStorePlain]: treesize reduction 38, result has 44.9 percent of original size [2020-12-23 01:31:29,096 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. [2020-12-23 01:31:29,097 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2020-12-23 01:31:29,168 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:29,169 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2020-12-23 01:31:29,171 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:29,199 INFO L625 ElimStorePlain]: treesize reduction 46, result has 40.3 percent of original size [2020-12-23 01:31:29,201 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. [2020-12-23 01:31:29,201 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2020-12-23 01:31:29,277 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:29,278 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2020-12-23 01:31:29,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:29,310 INFO L625 ElimStorePlain]: treesize reduction 38, result has 44.9 percent of original size [2020-12-23 01:31:29,312 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:29,312 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2020-12-23 01:31:29,475 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-23 01:31:29,530 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:29,531 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 30 treesize of output 24 [2020-12-23 01:31:29,532 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:29,538 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:29,542 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:29,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2020-12-23 01:31:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:31:29,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292048262] [2020-12-23 01:31:29,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:31:29,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783805996] [2020-12-23 01:31:29,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:31:29,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 01:31:29,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170841757] [2020-12-23 01:31:29,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:31:29,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:29,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:31:29,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:31:29,583 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 17 states. [2020-12-23 01:31:29,944 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-23 01:31:30,569 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-12-23 01:31:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:30,753 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-12-23 01:31:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:31:30,754 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-12-23 01:31:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:30,755 INFO L225 Difference]: With dead ends: 72 [2020-12-23 01:31:30,755 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 01:31:30,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:31:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 01:31:30,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-23 01:31:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 01:31:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-12-23 01:31:30,770 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 41 [2020-12-23 01:31:30,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:30,770 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-12-23 01:31:30,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:31:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-12-23 01:31:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 01:31:30,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:30,771 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:30,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 01:31:30,977 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:30,978 INFO L82 PathProgramCache]: Analyzing trace with hash -105011125, now seen corresponding path program 17 times [2020-12-23 01:31:30,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:30,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360302324] [2020-12-23 01:31:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:31,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360302324] [2020-12-23 01:31:31,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857382125] [2020-12-23 01:31:31,207 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:31,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 01:31:31,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:31,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:31:31,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:31,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:31,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-12-23 01:31:31,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100200419] [2020-12-23 01:31:31,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:31:31,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:31,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:31:31,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:31:31,603 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 25 states. [2020-12-23 01:31:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:32,307 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-12-23 01:31:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:31:32,308 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2020-12-23 01:31:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:32,309 INFO L225 Difference]: With dead ends: 78 [2020-12-23 01:31:32,309 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 01:31:32,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 01:31:32,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 01:31:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2020-12-23 01:31:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 01:31:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-12-23 01:31:32,319 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 43 [2020-12-23 01:31:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:32,319 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-12-23 01:31:32,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:31:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-12-23 01:31:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 01:31:32,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:32,319 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:32,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:32,520 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2029167523, now seen corresponding path program 18 times [2020-12-23 01:31:32,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:32,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360010984] [2020-12-23 01:31:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:32,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360010984] [2020-12-23 01:31:32,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056718176] [2020-12-23 01:31:32,703 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:32,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 01:31:32,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:32,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:31:32,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:33,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:33,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-12-23 01:31:33,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554353451] [2020-12-23 01:31:33,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:31:33,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:31:33,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:31:33,081 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 25 states. [2020-12-23 01:31:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:33,457 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-12-23 01:31:33,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:31:33,458 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2020-12-23 01:31:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:33,459 INFO L225 Difference]: With dead ends: 82 [2020-12-23 01:31:33,459 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 01:31:33,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:31:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 01:31:33,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-12-23 01:31:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 01:31:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-23 01:31:33,467 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 44 [2020-12-23 01:31:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:33,468 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-23 01:31:33,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:31:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-23 01:31:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 01:31:33,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:33,468 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:33,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 01:31:33,669 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:33,670 INFO L82 PathProgramCache]: Analyzing trace with hash -111213349, now seen corresponding path program 19 times [2020-12-23 01:31:33,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:33,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950721329] [2020-12-23 01:31:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:35,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950721329] [2020-12-23 01:31:35,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428905313] [2020-12-23 01:31:35,655 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:35,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 01:31:35,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:35,871 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 11 treesize of output 7 [2020-12-23 01:31:35,871 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:35,882 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:35,883 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:35,883 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:31:35,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:35,976 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:31:35,977 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:35,992 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:35,993 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:35,994 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 01:31:36,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:36,202 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:36,202 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:31:36,204 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:36,252 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2020-12-23 01:31:36,253 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:36,253 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-12-23 01:31:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:36,556 INFO L348 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2020-12-23 01:31:36,556 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2020-12-23 01:31:36,561 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:36,626 INFO L625 ElimStorePlain]: treesize reduction 42, result has 52.3 percent of original size [2020-12-23 01:31:36,626 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:36,627 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2020-12-23 01:31:36,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:36,993 INFO L348 Elim1Store]: treesize reduction 77, result has 51.9 percent of original size [2020-12-23 01:31:36,994 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 113 [2020-12-23 01:31:36,996 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:37,078 INFO L625 ElimStorePlain]: treesize reduction 42, result has 58.0 percent of original size [2020-12-23 01:31:37,079 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:37,080 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:58 [2020-12-23 01:31:37,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:37,531 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-12-23 01:31:37,531 INFO L348 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2020-12-23 01:31:37,532 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2020-12-23 01:31:37,537 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:37,646 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-12-23 01:31:37,647 INFO L625 ElimStorePlain]: treesize reduction 86, result has 42.7 percent of original size [2020-12-23 01:31:37,648 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:37,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2020-12-23 01:31:37,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:38,197 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-12-23 01:31:38,198 INFO L348 Elim1Store]: treesize reduction 163, result has 49.7 percent of original size [2020-12-23 01:31:38,199 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 197 [2020-12-23 01:31:38,203 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:38,324 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-23 01:31:38,324 INFO L625 ElimStorePlain]: treesize reduction 86, result has 46.9 percent of original size [2020-12-23 01:31:38,325 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:38,325 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2020-12-23 01:31:38,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:38,970 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 66 [2020-12-23 01:31:38,971 INFO L348 Elim1Store]: treesize reduction 170, result has 57.2 percent of original size [2020-12-23 01:31:38,971 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 266 [2020-12-23 01:31:38,976 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:39,140 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-12-23 01:31:39,141 INFO L625 ElimStorePlain]: treesize reduction 130, result has 39.5 percent of original size [2020-12-23 01:31:39,142 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:39,142 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:85 [2020-12-23 01:31:39,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:40,132 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2020-12-23 01:31:40,133 INFO L348 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2020-12-23 01:31:40,133 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 205 [2020-12-23 01:31:40,137 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:40,242 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-23 01:31:40,242 INFO L625 ElimStorePlain]: treesize reduction 72, result has 57.9 percent of original size [2020-12-23 01:31:40,243 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. [2020-12-23 01:31:40,243 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:116, output treesize:99 [2020-12-23 01:31:40,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:41,141 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2020-12-23 01:31:41,142 INFO L348 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2020-12-23 01:31:41,142 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 124 treesize of output 331 [2020-12-23 01:31:41,149 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:41,274 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-12-23 01:31:41,275 INFO L625 ElimStorePlain]: treesize reduction 86, result has 55.7 percent of original size [2020-12-23 01:31:41,276 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. [2020-12-23 01:31:41,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:135, output treesize:108 [2020-12-23 01:31:41,594 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-12-23 01:31:41,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:41,999 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2020-12-23 01:31:42,000 INFO L348 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2020-12-23 01:31:42,001 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 205 [2020-12-23 01:31:42,005 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:42,057 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:42,058 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. [2020-12-23 01:31:42,058 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:116, output treesize:91 [2020-12-23 01:31:42,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:42,794 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2020-12-23 01:31:42,795 INFO L348 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2020-12-23 01:31:42,796 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 205 [2020-12-23 01:31:42,799 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:42,850 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:42,851 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. [2020-12-23 01:31:42,851 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:116, output treesize:91 [2020-12-23 01:31:43,630 WARN L197 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-23 01:31:44,520 WARN L197 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-23 01:31:44,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:44,863 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2020-12-23 01:31:44,864 INFO L348 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2020-12-23 01:31:44,865 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 116 treesize of output 331 [2020-12-23 01:31:44,872 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:44,931 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:44,933 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. [2020-12-23 01:31:44,933 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:127, output treesize:102 [2020-12-23 01:31:46,151 WARN L197 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-23 01:31:47,443 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 01:31:47,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:48,024 WARN L197 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 129 [2020-12-23 01:31:48,025 INFO L348 Elim1Store]: treesize reduction 240, result has 58.4 percent of original size [2020-12-23 01:31:48,025 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 127 treesize of output 473 [2020-12-23 01:31:48,035 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:48,191 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-12-23 01:31:48,192 INFO L625 ElimStorePlain]: treesize reduction 168, result has 40.2 percent of original size [2020-12-23 01:31:48,194 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:48,194 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:138, output treesize:113 [2020-12-23 01:31:49,038 WARN L197 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-12-23 01:31:49,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:49,460 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2020-12-23 01:31:49,461 INFO L348 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2020-12-23 01:31:49,461 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 205 [2020-12-23 01:31:49,465 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:49,516 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:49,518 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:49,519 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:116, output treesize:91 [2020-12-23 01:31:49,759 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:31:49,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:31:49,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:49,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:49,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:31:49,772 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-23 01:31:49,776 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2020-12-23 01:31:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:49,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:49,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 67 [2020-12-23 01:31:49,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958152227] [2020-12-23 01:31:49,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 01:31:49,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:49,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 01:31:49,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=4176, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 01:31:49,954 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 67 states. [2020-12-23 01:31:53,075 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-23 01:31:53,324 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-23 01:31:53,603 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-23 01:31:54,078 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-12-23 01:31:54,347 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-12-23 01:31:54,685 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-12-23 01:31:55,000 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-23 01:31:55,431 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-23 01:31:55,863 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-23 01:31:56,126 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 01:31:56,447 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-23 01:31:56,805 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-23 01:31:57,072 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 01:31:57,397 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-23 01:31:57,888 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-12-23 01:31:58,723 WARN L197 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-12-23 01:32:00,115 WARN L197 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-23 01:32:00,532 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-12-23 01:32:02,788 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-23 01:32:04,161 WARN L197 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-23 01:32:04,558 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-23 01:32:05,058 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 01:32:05,471 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-23 01:32:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:06,279 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2020-12-23 01:32:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 01:32:06,280 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 46 [2020-12-23 01:32:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:06,281 INFO L225 Difference]: With dead ends: 101 [2020-12-23 01:32:06,281 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 01:32:06,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3315 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=632, Invalid=10710, Unknown=0, NotChecked=0, Total=11342 [2020-12-23 01:32:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 01:32:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-12-23 01:32:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 01:32:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-12-23 01:32:06,298 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 46 [2020-12-23 01:32:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:06,298 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-12-23 01:32:06,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 01:32:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-12-23 01:32:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 01:32:06,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:06,298 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:06,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:06,499 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:06,500 INFO L82 PathProgramCache]: Analyzing trace with hash 568845021, now seen corresponding path program 6 times [2020-12-23 01:32:06,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:06,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983866984] [2020-12-23 01:32:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:06,510 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:32:06,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25235247] [2020-12-23 01:32:06,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:06,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 01:32:06,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:06,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 01:32:06,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:06,687 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 15 treesize of output 11 [2020-12-23 01:32:06,688 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:06,698 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:06,699 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:06,699 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 01:32:06,745 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 01:32:06,746 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2020-12-23 01:32:06,747 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:06,762 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:06,763 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:06,763 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-12-23 01:32:06,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:06,937 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:32:06,938 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2020-12-23 01:32:06,940 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:06,976 INFO L625 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2020-12-23 01:32:06,977 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:06,977 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2020-12-23 01:32:06,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:07,027 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:32:07,028 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2020-12-23 01:32:07,030 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:07,072 INFO L625 ElimStorePlain]: treesize reduction 42, result has 46.8 percent of original size [2020-12-23 01:32:07,073 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:07,074 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2020-12-23 01:32:07,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:07,131 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:32:07,132 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2020-12-23 01:32:07,134 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:07,184 INFO L625 ElimStorePlain]: treesize reduction 42, result has 46.8 percent of original size [2020-12-23 01:32:07,185 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:07,186 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2020-12-23 01:32:07,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:07,232 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:32:07,233 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2020-12-23 01:32:07,235 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:07,273 INFO L625 ElimStorePlain]: treesize reduction 51, result has 42.0 percent of original size [2020-12-23 01:32:07,274 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:07,275 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2020-12-23 01:32:07,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:07,325 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:32:07,325 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2020-12-23 01:32:07,327 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:07,364 INFO L625 ElimStorePlain]: treesize reduction 51, result has 42.0 percent of original size [2020-12-23 01:32:07,366 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:07,366 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:32 [2020-12-23 01:32:07,434 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:32:07,434 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 35 treesize of output 43 [2020-12-23 01:32:07,436 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:07,457 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:07,458 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:32:07,459 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:32:07,461 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:32:07,463 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2020-12-23 01:32:07,463 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:56 [2020-12-23 01:32:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 01:32:07,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983866984] [2020-12-23 01:32:07,588 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:32:07,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25235247] [2020-12-23 01:32:07,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:32:07,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 01:32:07,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026292669] [2020-12-23 01:32:07,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 01:32:07,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 01:32:07,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:32:07,589 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 14 states. [2020-12-23 01:32:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:08,285 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-12-23 01:32:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:32:08,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-23 01:32:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:08,288 INFO L225 Difference]: With dead ends: 81 [2020-12-23 01:32:08,288 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 01:32:08,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:32:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 01:32:08,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-12-23 01:32:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 01:32:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-12-23 01:32:08,305 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 46 [2020-12-23 01:32:08,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:08,305 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-12-23 01:32:08,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 01:32:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-12-23 01:32:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 01:32:08,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:08,306 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:08,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 01:32:08,515 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:08,516 INFO L82 PathProgramCache]: Analyzing trace with hash 501777881, now seen corresponding path program 20 times [2020-12-23 01:32:08,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:08,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497764942] [2020-12-23 01:32:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497764942] [2020-12-23 01:32:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719491602] [2020-12-23 01:32:08,796 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:08,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:32:08,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:08,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:32:08,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:09,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:32:09,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2020-12-23 01:32:09,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085323081] [2020-12-23 01:32:09,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 01:32:09,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:09,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 01:32:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:32:09,137 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 28 states. [2020-12-23 01:32:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:10,394 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2020-12-23 01:32:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 01:32:10,396 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2020-12-23 01:32:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:10,397 INFO L225 Difference]: With dead ends: 98 [2020-12-23 01:32:10,397 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 01:32:10,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:32:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 01:32:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2020-12-23 01:32:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 01:32:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-12-23 01:32:10,410 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 48 [2020-12-23 01:32:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:10,411 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-12-23 01:32:10,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 01:32:10,411 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-12-23 01:32:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:32:10,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:10,411 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:10,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 01:32:10,616 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:10,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash -198074805, now seen corresponding path program 21 times [2020-12-23 01:32:10,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:10,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049321972] [2020-12-23 01:32:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:10,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049321972] [2020-12-23 01:32:10,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607296574] [2020-12-23 01:32:10,876 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:11,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 01:32:11,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:11,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:32:11,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:11,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:32:11,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2020-12-23 01:32:11,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079725835] [2020-12-23 01:32:11,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 01:32:11,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:11,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 01:32:11,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:32:11,380 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 28 states. [2020-12-23 01:32:11,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:11,875 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-12-23 01:32:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:32:11,876 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 49 [2020-12-23 01:32:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:11,877 INFO L225 Difference]: With dead ends: 102 [2020-12-23 01:32:11,877 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 01:32:11,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:32:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 01:32:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2020-12-23 01:32:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 01:32:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-12-23 01:32:11,892 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 49 [2020-12-23 01:32:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:11,893 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-12-23 01:32:11,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 01:32:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-12-23 01:32:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:32:11,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:11,893 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:12,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 01:32:12,102 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:12,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash -777284467, now seen corresponding path program 22 times [2020-12-23 01:32:12,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:12,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905695691] [2020-12-23 01:32:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:14,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905695691] [2020-12-23 01:32:14,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622607695] [2020-12-23 01:32:14,635 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:14,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:32:14,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:14,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 01:32:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:14,709 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:32:14,710 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:14,718 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:14,722 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:32:14,723 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:14,731 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:14,733 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:14,733 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-23 01:32:14,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:14,747 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:32:14,748 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:14,760 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:14,761 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:14,761 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2020-12-23 01:32:14,971 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:14,972 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:32:14,974 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:15,021 INFO L625 ElimStorePlain]: treesize reduction 20, result has 62.3 percent of original size [2020-12-23 01:32:15,022 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:15,022 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-23 01:32:15,320 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2020-12-23 01:32:15,320 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2020-12-23 01:32:15,323 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:15,386 INFO L625 ElimStorePlain]: treesize reduction 20, result has 69.2 percent of original size [2020-12-23 01:32:15,387 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:15,387 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2020-12-23 01:32:15,822 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-23 01:32:15,823 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2020-12-23 01:32:15,823 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2020-12-23 01:32:15,827 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:15,915 INFO L625 ElimStorePlain]: treesize reduction 64, result has 44.3 percent of original size [2020-12-23 01:32:15,916 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:15,916 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2020-12-23 01:32:16,447 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-12-23 01:32:16,448 INFO L348 Elim1Store]: treesize reduction 114, result has 51.7 percent of original size [2020-12-23 01:32:16,448 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 155 [2020-12-23 01:32:16,451 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:16,546 INFO L625 ElimStorePlain]: treesize reduction 64, result has 49.6 percent of original size [2020-12-23 01:32:16,546 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:16,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:63 [2020-12-23 01:32:17,229 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-12-23 01:32:17,230 INFO L348 Elim1Store]: treesize reduction 112, result has 62.7 percent of original size [2020-12-23 01:32:17,230 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 224 [2020-12-23 01:32:17,235 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:17,376 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-12-23 01:32:17,377 INFO L625 ElimStorePlain]: treesize reduction 108, result has 39.0 percent of original size [2020-12-23 01:32:17,378 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:17,378 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:69 [2020-12-23 01:32:18,233 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 66 [2020-12-23 01:32:18,234 INFO L348 Elim1Store]: treesize reduction 170, result has 57.2 percent of original size [2020-12-23 01:32:18,234 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 266 [2020-12-23 01:32:18,240 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:18,409 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-12-23 01:32:18,410 INFO L625 ElimStorePlain]: treesize reduction 130, result has 37.5 percent of original size [2020-12-23 01:32:18,411 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:18,411 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:78 [2020-12-23 01:32:19,392 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 76 [2020-12-23 01:32:19,393 INFO L348 Elim1Store]: treesize reduction 240, result has 52.6 percent of original size [2020-12-23 01:32:19,394 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 308 [2020-12-23 01:32:19,401 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:19,607 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-12-23 01:32:19,607 INFO L625 ElimStorePlain]: treesize reduction 152, result has 37.2 percent of original size [2020-12-23 01:32:19,608 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:19,609 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:90 [2020-12-23 01:32:21,178 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2020-12-23 01:32:21,179 INFO L348 Elim1Store]: treesize reduction 322, result has 25.6 percent of original size [2020-12-23 01:32:21,179 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 231 [2020-12-23 01:32:21,186 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:21,324 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-12-23 01:32:21,325 INFO L625 ElimStorePlain]: treesize reduction 78, result has 56.9 percent of original size [2020-12-23 01:32:21,326 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. [2020-12-23 01:32:21,326 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:124, output treesize:103 [2020-12-23 01:32:22,495 WARN L197 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-23 01:32:23,598 WARN L197 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-23 01:32:24,064 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2020-12-23 01:32:24,065 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2020-12-23 01:32:24,065 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 129 treesize of output 371 [2020-12-23 01:32:24,073 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:24,244 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-12-23 01:32:24,245 INFO L625 ElimStorePlain]: treesize reduction 142, result has 45.8 percent of original size [2020-12-23 01:32:24,246 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. [2020-12-23 01:32:24,246 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:139, output treesize:120 [2020-12-23 01:32:24,806 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-23 01:32:25,846 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2020-12-23 01:32:25,847 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2020-12-23 01:32:25,847 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 135 treesize of output 373 [2020-12-23 01:32:25,855 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:26,015 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-23 01:32:26,016 INFO L625 ElimStorePlain]: treesize reduction 48, result has 71.4 percent of original size [2020-12-23 01:32:26,017 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. [2020-12-23 01:32:26,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:145, output treesize:120 [2020-12-23 01:32:27,135 WARN L197 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 01:32:27,752 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-12-23 01:32:28,218 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2020-12-23 01:32:28,219 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2020-12-23 01:32:28,219 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 135 treesize of output 373 [2020-12-23 01:32:28,229 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:28,306 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:28,310 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. [2020-12-23 01:32:28,313 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:145, output treesize:110 [2020-12-23 01:32:28,813 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-23 01:32:29,458 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2020-12-23 01:32:29,459 INFO L348 Elim1Store]: treesize reduction 322, result has 25.6 percent of original size [2020-12-23 01:32:29,460 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 231 [2020-12-23 01:32:29,466 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:29,617 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-12-23 01:32:29,618 INFO L625 ElimStorePlain]: treesize reduction 70, result has 60.9 percent of original size [2020-12-23 01:32:29,619 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. [2020-12-23 01:32:29,619 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:124, output treesize:109 [2020-12-23 01:32:31,073 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2020-12-23 01:32:31,074 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2020-12-23 01:32:31,074 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 135 treesize of output 373 [2020-12-23 01:32:31,083 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:31,282 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2020-12-23 01:32:31,283 INFO L625 ElimStorePlain]: treesize reduction 248, result has 35.2 percent of original size [2020-12-23 01:32:31,284 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. [2020-12-23 01:32:31,285 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:145, output treesize:135 [2020-12-23 01:32:33,162 WARN L197 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2020-12-23 01:32:33,163 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2020-12-23 01:32:33,164 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 161 treesize of output 532 [2020-12-23 01:32:33,179 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:33,380 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-12-23 01:32:33,381 INFO L625 ElimStorePlain]: treesize reduction 88, result has 59.1 percent of original size [2020-12-23 01:32:33,382 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:33,382 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:171, output treesize:127 [2020-12-23 01:32:34,149 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-12-23 01:32:34,934 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2020-12-23 01:32:34,935 INFO L348 Elim1Store]: treesize reduction 322, result has 25.6 percent of original size [2020-12-23 01:32:34,936 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 231 [2020-12-23 01:32:34,941 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:35,018 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:35,020 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:35,020 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:124, output treesize:99 [2020-12-23 01:32:35,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:32:35,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:32:35,438 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:32:35,440 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:32:35,445 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:32:35,446 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-12-23 01:32:35,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2020-12-23 01:32:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:35,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:32:35,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 72 [2020-12-23 01:32:35,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788573230] [2020-12-23 01:32:35,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 01:32:35,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 01:32:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=4878, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 01:32:35,736 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 72 states. [2020-12-23 01:32:39,233 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-12-23 01:32:39,513 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-23 01:32:41,222 WARN L197 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-23 01:32:42,154 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-23 01:32:43,070 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-23 01:32:43,846 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-23 01:32:44,862 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 01:32:45,794 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-23 01:32:47,080 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-23 01:32:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:48,651 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2020-12-23 01:32:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 01:32:48,652 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 51 [2020-12-23 01:32:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:48,653 INFO L225 Difference]: With dead ends: 112 [2020-12-23 01:32:48,653 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 01:32:48,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=332, Invalid=6640, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 01:32:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 01:32:48,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2020-12-23 01:32:48,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 01:32:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-12-23 01:32:48,673 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 51 [2020-12-23 01:32:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:48,673 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-12-23 01:32:48,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 01:32:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-12-23 01:32:48,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:32:48,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:48,674 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:48,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:48,875 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:48,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:48,875 INFO L82 PathProgramCache]: Analyzing trace with hash -519119029, now seen corresponding path program 7 times [2020-12-23 01:32:48,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:48,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483347509] [2020-12-23 01:32:48,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:48,887 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:32:48,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829476491] [2020-12-23 01:32:48,888 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:48,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 01:32:48,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:48,979 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:32:48,980 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:48,985 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:48,986 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:48,986 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 01:32:49,069 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 01:32:49,070 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:49,087 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:49,088 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:49,089 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:32:49,182 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:49,183 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:32:49,185 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:49,226 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2020-12-23 01:32:49,226 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:49,227 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 01:32:49,379 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:49,380 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 118 [2020-12-23 01:32:49,383 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:49,453 INFO L625 ElimStorePlain]: treesize reduction 50, result has 46.8 percent of original size [2020-12-23 01:32:49,455 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. [2020-12-23 01:32:49,455 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:44 [2020-12-23 01:32:50,744 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:50,745 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:32:50,749 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:50,814 INFO L625 ElimStorePlain]: treesize reduction 156, result has 23.2 percent of original size [2020-12-23 01:32:50,816 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. [2020-12-23 01:32:50,816 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2020-12-23 01:32:50,984 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:50,985 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:32:50,988 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:51,060 INFO L625 ElimStorePlain]: treesize reduction 66, result has 41.6 percent of original size [2020-12-23 01:32:51,062 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. [2020-12-23 01:32:51,063 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2020-12-23 01:32:51,252 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:51,253 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:32:51,258 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:51,318 INFO L625 ElimStorePlain]: treesize reduction 66, result has 41.6 percent of original size [2020-12-23 01:32:51,320 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. [2020-12-23 01:32:51,320 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2020-12-23 01:32:51,494 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:51,494 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:32:51,497 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:51,566 INFO L625 ElimStorePlain]: treesize reduction 96, result has 32.9 percent of original size [2020-12-23 01:32:51,568 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. [2020-12-23 01:32:51,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2020-12-23 01:32:51,746 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:51,747 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:32:51,750 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:51,816 INFO L625 ElimStorePlain]: treesize reduction 102, result has 31.5 percent of original size [2020-12-23 01:32:51,819 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. [2020-12-23 01:32:51,819 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:43 [2020-12-23 01:32:52,000 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:52,001 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 41 treesize of output 57 [2020-12-23 01:32:52,003 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:52,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:52,017 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:52,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2020-12-23 01:32:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 46 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 01:32:52,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483347509] [2020-12-23 01:32:52,091 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:32:52,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829476491] [2020-12-23 01:32:52,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:32:52,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-23 01:32:52,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033002380] [2020-12-23 01:32:52,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 01:32:52,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:52,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 01:32:52,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:32:52,093 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 21 states. [2020-12-23 01:32:53,435 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 01:32:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:54,221 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-12-23 01:32:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:32:54,223 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-12-23 01:32:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:54,224 INFO L225 Difference]: With dead ends: 88 [2020-12-23 01:32:54,224 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 01:32:54,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:32:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 01:32:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-23 01:32:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 01:32:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-12-23 01:32:54,246 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 51 [2020-12-23 01:32:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:54,247 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-12-23 01:32:54,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 01:32:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-12-23 01:32:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 01:32:54,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:54,248 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:54,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 01:32:54,452 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash 947978831, now seen corresponding path program 23 times [2020-12-23 01:32:54,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:54,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655846561] [2020-12-23 01:32:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 49 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:54,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655846561] [2020-12-23 01:32:54,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262037845] [2020-12-23 01:32:54,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:55,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 01:32:55,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:32:55,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 64 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:55,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:32:55,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2020-12-23 01:32:55,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560220604] [2020-12-23 01:32:55,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:32:55,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:32:55,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:32:55,479 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 31 states. [2020-12-23 01:32:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:57,296 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2020-12-23 01:32:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 01:32:57,297 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 53 [2020-12-23 01:32:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:57,298 INFO L225 Difference]: With dead ends: 106 [2020-12-23 01:32:57,298 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 01:32:57,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=526, Invalid=1826, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 01:32:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 01:32:57,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 60. [2020-12-23 01:32:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 01:32:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-12-23 01:32:57,321 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 53 [2020-12-23 01:32:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:57,321 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-12-23 01:32:57,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:32:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-12-23 01:32:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 01:32:57,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:57,322 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:57,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:57,523 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash -373843623, now seen corresponding path program 24 times [2020-12-23 01:32:57,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:57,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237073754] [2020-12-23 01:32:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 95 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:57,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237073754] [2020-12-23 01:32:57,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438224610] [2020-12-23 01:32:57,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:58,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 01:32:58,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:32:58,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:58,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:32:58,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2020-12-23 01:32:58,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038110251] [2020-12-23 01:32:58,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:32:58,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:58,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:32:58,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:32:58,611 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 31 states. [2020-12-23 01:32:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:59,276 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2020-12-23 01:32:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 01:32:59,278 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 54 [2020-12-23 01:32:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:59,278 INFO L225 Difference]: With dead ends: 110 [2020-12-23 01:32:59,278 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 01:32:59,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:32:59,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 01:32:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2020-12-23 01:32:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 01:32:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-12-23 01:32:59,296 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2020-12-23 01:32:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:59,296 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-12-23 01:32:59,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:32:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-12-23 01:32:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 01:32:59,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:59,296 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:59,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 01:32:59,497 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:59,498 INFO L82 PathProgramCache]: Analyzing trace with hash -928564137, now seen corresponding path program 25 times [2020-12-23 01:32:59,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:59,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149199677] [2020-12-23 01:32:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:33:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:33:03,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149199677] [2020-12-23 01:33:03,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476880389] [2020-12-23 01:33:03,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:33:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:33:03,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-23 01:33:03,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:33:03,430 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 11 treesize of output 7 [2020-12-23 01:33:03,431 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:03,445 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:33:03,446 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:03,446 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:33:03,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:03,590 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:33:03,591 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:03,610 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:33:03,611 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:03,612 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 01:33:03,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:03,946 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:33:03,946 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:33:03,948 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:04,014 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2020-12-23 01:33:04,015 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:04,015 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-12-23 01:33:04,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:04,462 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2020-12-23 01:33:04,462 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2020-12-23 01:33:04,465 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:04,536 INFO L625 ElimStorePlain]: treesize reduction 20, result has 71.0 percent of original size [2020-12-23 01:33:04,538 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:04,538 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2020-12-23 01:33:04,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:05,052 INFO L348 Elim1Store]: treesize reduction 122, result has 31.5 percent of original size [2020-12-23 01:33:05,053 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 86 [2020-12-23 01:33:05,055 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:05,136 INFO L625 ElimStorePlain]: treesize reduction 20, result has 75.3 percent of original size [2020-12-23 01:33:05,137 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:05,138 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2020-12-23 01:33:05,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:05,713 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2020-12-23 01:33:05,713 INFO L348 Elim1Store]: treesize reduction 210, result has 24.5 percent of original size [2020-12-23 01:33:05,714 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 101 [2020-12-23 01:33:05,717 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:05,811 INFO L625 ElimStorePlain]: treesize reduction 20, result has 78.5 percent of original size [2020-12-23 01:33:05,817 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:05,817 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:73 [2020-12-23 01:33:06,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:06,513 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 37 [2020-12-23 01:33:06,514 INFO L348 Elim1Store]: treesize reduction 316, result has 20.2 percent of original size [2020-12-23 01:33:06,515 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 116 [2020-12-23 01:33:06,518 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:06,617 INFO L625 ElimStorePlain]: treesize reduction 20, result has 81.0 percent of original size [2020-12-23 01:33:06,618 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:06,619 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:85 [2020-12-23 01:33:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:07,418 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 42 [2020-12-23 01:33:07,419 INFO L348 Elim1Store]: treesize reduction 440, result has 17.3 percent of original size [2020-12-23 01:33:07,419 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 90 treesize of output 131 [2020-12-23 01:33:07,422 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:07,557 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-23 01:33:07,558 INFO L625 ElimStorePlain]: treesize reduction 20, result has 82.9 percent of original size [2020-12-23 01:33:07,558 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:07,558 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:97 [2020-12-23 01:33:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:08,542 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 47 [2020-12-23 01:33:08,543 INFO L348 Elim1Store]: treesize reduction 582, result has 15.2 percent of original size [2020-12-23 01:33:08,544 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 146 [2020-12-23 01:33:08,547 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:08,690 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-23 01:33:08,692 INFO L625 ElimStorePlain]: treesize reduction 20, result has 84.5 percent of original size [2020-12-23 01:33:08,694 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:08,694 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:113, output treesize:109 [2020-12-23 01:33:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:10,152 WARN L197 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 86 [2020-12-23 01:33:10,153 INFO L348 Elim1Store]: treesize reduction 322, result has 48.6 percent of original size [2020-12-23 01:33:10,153 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 350 [2020-12-23 01:33:10,160 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:10,516 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2020-12-23 01:33:10,517 INFO L625 ElimStorePlain]: treesize reduction 174, result has 37.2 percent of original size [2020-12-23 01:33:10,518 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:10,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:103 [2020-12-23 01:33:13,050 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-23 01:33:13,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:13,328 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 67 [2020-12-23 01:33:13,329 INFO L348 Elim1Store]: treesize reduction 416, result has 23.1 percent of original size [2020-12-23 01:33:13,329 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 123 treesize of output 257 [2020-12-23 01:33:13,335 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:13,562 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-12-23 01:33:13,563 INFO L625 ElimStorePlain]: treesize reduction 142, result has 45.2 percent of original size [2020-12-23 01:33:13,564 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. [2020-12-23 01:33:13,564 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:134, output treesize:117 [2020-12-23 01:33:14,275 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-23 01:33:15,178 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-23 01:33:15,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:15,805 WARN L197 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 111 [2020-12-23 01:33:15,806 INFO L348 Elim1Store]: treesize reduction 416, result has 38.9 percent of original size [2020-12-23 01:33:15,807 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 142 treesize of output 411 [2020-12-23 01:33:15,815 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:16,085 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-12-23 01:33:16,086 INFO L625 ElimStorePlain]: treesize reduction 120, result has 52.0 percent of original size [2020-12-23 01:33:16,088 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. [2020-12-23 01:33:16,088 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:153, output treesize:130 [2020-12-23 01:33:17,283 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-23 01:33:18,282 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-23 01:33:18,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:18,986 WARN L197 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 111 [2020-12-23 01:33:18,987 INFO L348 Elim1Store]: treesize reduction 416, result has 38.9 percent of original size [2020-12-23 01:33:18,988 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 144 treesize of output 413 [2020-12-23 01:33:18,996 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:19,296 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-12-23 01:33:19,297 INFO L625 ElimStorePlain]: treesize reduction 142, result has 47.8 percent of original size [2020-12-23 01:33:19,299 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. [2020-12-23 01:33:19,299 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:155, output treesize:130 [2020-12-23 01:33:20,363 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-23 01:33:21,339 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-23 01:33:21,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:22,004 WARN L197 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 111 [2020-12-23 01:33:22,005 INFO L348 Elim1Store]: treesize reduction 416, result has 38.9 percent of original size [2020-12-23 01:33:22,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 144 treesize of output 413 [2020-12-23 01:33:22,018 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:22,329 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 62 [2020-12-23 01:33:22,330 INFO L625 ElimStorePlain]: treesize reduction 360, result has 27.9 percent of original size [2020-12-23 01:33:22,332 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. [2020-12-23 01:33:22,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:155, output treesize:139 [2020-12-23 01:33:23,384 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-23 01:33:24,475 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-23 01:33:24,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:25,598 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2020-12-23 01:33:25,600 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2020-12-23 01:33:25,600 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 164 treesize of output 584 [2020-12-23 01:33:25,614 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:25,961 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 68 [2020-12-23 01:33:25,962 INFO L625 ElimStorePlain]: treesize reduction 244, result has 39.0 percent of original size [2020-12-23 01:33:25,964 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:25,964 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:175, output treesize:156 [2020-12-23 01:33:27,071 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-12-23 01:33:27,992 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-23 01:33:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:29,020 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2020-12-23 01:33:29,021 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2020-12-23 01:33:29,022 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 170 treesize of output 586 [2020-12-23 01:33:29,038 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:29,413 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2020-12-23 01:33:29,414 INFO L625 ElimStorePlain]: treesize reduction 189, result has 45.2 percent of original size [2020-12-23 01:33:29,416 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:29,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:181, output treesize:156 [2020-12-23 01:33:31,153 WARN L197 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-23 01:33:32,994 WARN L197 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-23 01:33:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:34,768 WARN L197 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 355 DAG size of output: 211 [2020-12-23 01:33:34,769 INFO L348 Elim1Store]: treesize reduction 416, result has 58.8 percent of original size [2020-12-23 01:33:34,770 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 181 treesize of output 772 [2020-12-23 01:33:34,796 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:35,137 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2020-12-23 01:33:35,137 INFO L625 ElimStorePlain]: treesize reduction 249, result has 40.1 percent of original size [2020-12-23 01:33:35,139 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:35,139 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:192, output treesize:167 [2020-12-23 01:33:36,456 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-12-23 01:33:37,696 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-23 01:33:37,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:38,841 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2020-12-23 01:33:38,843 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2020-12-23 01:33:38,844 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 170 treesize of output 586 [2020-12-23 01:33:38,869 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:39,203 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2020-12-23 01:33:39,204 INFO L625 ElimStorePlain]: treesize reduction 220, result has 40.5 percent of original size [2020-12-23 01:33:39,207 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:39,207 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:181, output treesize:150 [2020-12-23 01:33:40,390 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-23 01:33:41,501 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-23 01:33:41,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:42,595 WARN L197 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2020-12-23 01:33:42,596 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2020-12-23 01:33:42,597 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 164 treesize of output 584 [2020-12-23 01:33:42,609 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:42,956 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 67 [2020-12-23 01:33:42,957 INFO L625 ElimStorePlain]: treesize reduction 264, result has 36.2 percent of original size [2020-12-23 01:33:42,962 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:42,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:175, output treesize:150 [2020-12-23 01:33:43,969 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:33:43,971 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:33:43,972 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:33:43,974 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:33:43,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:33:43,986 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2020-12-23 01:33:43,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 17 disjuncts [2020-12-23 01:33:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:33:44,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:33:44,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43] total 83 [2020-12-23 01:33:44,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587175393] [2020-12-23 01:33:44,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-23 01:33:44,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:33:44,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-23 01:33:44,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=6498, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 01:33:44,547 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 83 states. [2020-12-23 01:33:47,806 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-23 01:33:48,133 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-23 01:33:48,686 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-23 01:33:49,183 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-23 01:33:50,141 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-23 01:33:50,647 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-23 01:33:52,012 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-23 01:33:52,388 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-23 01:33:53,149 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-23 01:33:53,559 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-23 01:33:54,886 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-23 01:33:55,485 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-23 01:33:56,327 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-23 01:33:58,399 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-12-23 01:33:59,155 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-12-23 01:34:00,613 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-12-23 01:34:01,615 WARN L197 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-23 01:34:02,697 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-23 01:34:04,031 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-12-23 01:34:05,073 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-23 01:34:06,327 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-12-23 01:34:07,543 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-12-23 01:34:08,536 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-23 01:34:09,669 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-12-23 01:34:10,912 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-12-23 01:34:11,922 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-23 01:34:13,157 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-12-23 01:34:14,447 WARN L197 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-12-23 01:34:15,597 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-12-23 01:34:16,818 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-12-23 01:34:18,462 WARN L197 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-12-23 01:34:19,689 WARN L197 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-12-23 01:34:21,172 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2020-12-23 01:34:22,712 WARN L197 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-12-23 01:34:24,688 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-12-23 01:34:26,169 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-12-23 01:34:27,498 WARN L197 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-12-23 01:34:29,085 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-23 01:34:30,421 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-12-23 01:34:31,328 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-12-23 01:34:32,865 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-12-23 01:34:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:34:33,307 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2020-12-23 01:34:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 01:34:33,309 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 56 [2020-12-23 01:34:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:34:33,310 INFO L225 Difference]: With dead ends: 123 [2020-12-23 01:34:33,310 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 01:34:33,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5273 ImplicationChecksByTransitivity, 60.1s TimeCoverageRelationStatistics Valid=789, Invalid=16767, Unknown=0, NotChecked=0, Total=17556 [2020-12-23 01:34:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 01:34:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-12-23 01:34:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 01:34:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2020-12-23 01:34:33,338 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 56 [2020-12-23 01:34:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:34:33,338 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2020-12-23 01:34:33,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-23 01:34:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2020-12-23 01:34:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 01:34:33,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:34:33,339 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:34:33,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 01:34:33,540 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:34:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:34:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash -670398699, now seen corresponding path program 8 times [2020-12-23 01:34:33,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:34:33,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675433869] [2020-12-23 01:34:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:34:33,553 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:34:33,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215872150] [2020-12-23 01:34:33,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:34:33,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:34:33,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:34:33,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 01:34:33,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:34:33,855 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 15 treesize of output 11 [2020-12-23 01:34:33,857 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:33,878 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:33,879 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:33,880 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-23 01:34:34,047 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:34,047 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:34:34,050 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:34,114 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.9 percent of original size [2020-12-23 01:34:34,115 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:34,115 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2020-12-23 01:34:34,379 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:34,380 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 118 [2020-12-23 01:34:34,382 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:34,498 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2020-12-23 01:34:34,499 INFO L625 ElimStorePlain]: treesize reduction 50, result has 47.4 percent of original size [2020-12-23 01:34:34,501 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. [2020-12-23 01:34:34,501 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:45 [2020-12-23 01:34:35,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:36,070 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:36,071 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:36,076 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:36,183 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2020-12-23 01:34:36,184 INFO L625 ElimStorePlain]: treesize reduction 156, result has 23.5 percent of original size [2020-12-23 01:34:36,186 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. [2020-12-23 01:34:36,187 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:48 [2020-12-23 01:34:36,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:36,472 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:36,473 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:36,476 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:36,567 INFO L625 ElimStorePlain]: treesize reduction 96, result has 33.3 percent of original size [2020-12-23 01:34:36,570 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. [2020-12-23 01:34:36,570 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:48 [2020-12-23 01:34:36,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:36,784 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:36,784 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:36,789 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:36,878 INFO L625 ElimStorePlain]: treesize reduction 102, result has 32.0 percent of original size [2020-12-23 01:34:36,881 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. [2020-12-23 01:34:36,881 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:48 [2020-12-23 01:34:37,495 WARN L197 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 01:34:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:37,597 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:37,598 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:37,601 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:37,717 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2020-12-23 01:34:37,718 INFO L625 ElimStorePlain]: treesize reduction 156, result has 23.5 percent of original size [2020-12-23 01:34:37,721 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. [2020-12-23 01:34:37,721 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:48 [2020-12-23 01:34:37,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:37,951 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:37,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:37,955 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:38,060 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2020-12-23 01:34:38,061 INFO L625 ElimStorePlain]: treesize reduction 156, result has 23.5 percent of original size [2020-12-23 01:34:38,063 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. [2020-12-23 01:34:38,064 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:48 [2020-12-23 01:34:38,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:38,297 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:38,298 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:38,302 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:38,394 INFO L625 ElimStorePlain]: treesize reduction 66, result has 42.1 percent of original size [2020-12-23 01:34:38,397 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. [2020-12-23 01:34:38,398 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:73, output treesize:43 [2020-12-23 01:34:38,687 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:38,688 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 41 treesize of output 57 [2020-12-23 01:34:38,690 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:38,706 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:38,709 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:38,709 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2020-12-23 01:34:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 54 proven. 137 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 01:34:38,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675433869] [2020-12-23 01:34:38,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:34:38,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215872150] [2020-12-23 01:34:38,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:34:38,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 01:34:38,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452694133] [2020-12-23 01:34:38,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 01:34:38,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:34:38,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 01:34:38,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=446, Unknown=1, NotChecked=0, Total=506 [2020-12-23 01:34:38,814 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 23 states. [2020-12-23 01:34:42,108 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 01:34:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:34:43,753 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2020-12-23 01:34:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:34:43,756 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-12-23 01:34:43,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:34:43,756 INFO L225 Difference]: With dead ends: 96 [2020-12-23 01:34:43,757 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 01:34:43,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=91, Invalid=664, Unknown=1, NotChecked=0, Total=756 [2020-12-23 01:34:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 01:34:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-23 01:34:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 01:34:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-12-23 01:34:43,782 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 56 [2020-12-23 01:34:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:34:43,783 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-12-23 01:34:43,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 01:34:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-12-23 01:34:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 01:34:43,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:34:43,784 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:34:43,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 01:34:43,997 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:34:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:34:43,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1439033387, now seen corresponding path program 26 times [2020-12-23 01:34:43,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:34:43,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77824320] [2020-12-23 01:34:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:34:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:34:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 64 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:34:44,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77824320] [2020-12-23 01:34:44,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501608865] [2020-12-23 01:34:44,724 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:34:44,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:34:44,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:34:44,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 01:34:44,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:34:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 81 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:34:45,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:34:45,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2020-12-23 01:34:45,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235815765] [2020-12-23 01:34:45,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 01:34:45,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:34:45,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 01:34:45,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 01:34:45,393 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 34 states.