/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/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:42:55,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:42:55,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:42:55,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:42:55,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:42:55,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:42:55,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:42:55,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:42:55,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:42:55,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:42:55,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:42:55,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:42:55,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:42:55,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:42:55,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:42:55,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:42:55,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:42:55,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:42:55,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:42:55,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:42:55,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:42:55,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:42:55,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:42:55,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:42:55,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:42:55,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:42:55,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:42:55,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:42:55,814 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 06:42:55,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:42:55,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:42:55,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:42:55,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:42:55,866 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:42:55,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:42:55,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:42:55,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:42:55,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:42:55,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:42:55,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:42:55,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:42:55,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:42:55,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:42:55,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:42:55,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:42:55,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:42:55,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:42:55,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:42:55,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:42:55,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:42:55,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:42:55,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:42:55,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:42:55,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:42:55,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:42:56,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:42:56,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:42:56,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:42:56,316 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:42:56,317 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:42:56,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/insertion_sort-1.c [2020-12-23 06:42:56,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/13f40a9b4/a7d330ca091843f8ba32073de7166570/FLAG913a9292a [2020-12-23 06:42:56,955 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:42:56,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-1.c [2020-12-23 06:42:56,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/13f40a9b4/a7d330ca091843f8ba32073de7166570/FLAG913a9292a [2020-12-23 06:42:57,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/13f40a9b4/a7d330ca091843f8ba32073de7166570 [2020-12-23 06:42:57,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:42:57,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:42:57,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:42:57,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:42:57,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:42:57,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d62933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57, skipping insertion in model container [2020-12-23 06:42:57,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:42:57,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:42:57,509 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/loops/insertion_sort-1.c[328,341] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~v~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~key~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~v~0,],[BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~v~0,],[BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2020-12-23 06:42:57,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:42:57,551 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:42:57,571 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/loops/insertion_sort-1.c[328,341] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#v~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#v~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~key~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#v~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#v~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHPLUS,IntegerLiteral[1],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[~#v~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#v~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]]]] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2020-12-23 06:42:57,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:42:57,625 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:42:57,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57 WrapperNode [2020-12-23 06:42:57,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:42:57,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:42:57,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:42:57,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:42:57,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:42:57,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:42:57,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:42:57,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:42:57,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (1/1) ... [2020-12-23 06:42:57,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:42:57,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:42:57,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:42:57,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:42:57,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (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 06:42:57,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:42:57,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:42:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:42:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:42:57,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:42:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:42:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:42:58,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:42:58,276 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 06:42:58,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:42:58 BoogieIcfgContainer [2020-12-23 06:42:58,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:42:58,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:42:58,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:42:58,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:42:58,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:42:57" (1/3) ... [2020-12-23 06:42:58,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1295a4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:42:58, skipping insertion in model container [2020-12-23 06:42:58,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:57" (2/3) ... [2020-12-23 06:42:58,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1295a4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:42:58, skipping insertion in model container [2020-12-23 06:42:58,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:42:58" (3/3) ... [2020-12-23 06:42:58,301 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2020-12-23 06:42:58,308 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:42:58,312 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:42:58,334 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:42:58,361 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:42:58,362 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:42:58,362 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:42:58,362 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:42:58,362 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:42:58,362 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:42:58,362 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:42:58,363 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:42:58,377 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 06:42:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:42:58,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:58,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:42:58,385 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2015618667, now seen corresponding path program 1 times [2020-12-23 06:42:58,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:58,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109693421] [2020-12-23 06:42:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:58,705 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 06:42:58,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109693421] [2020-12-23 06:42:58,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:42:58,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:42:58,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117324605] [2020-12-23 06:42:58,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:42:58,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:58,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:42:58,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:42:58,730 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-12-23 06:42:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:58,825 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2020-12-23 06:42:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:42:58,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 06:42:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:58,836 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:42:58,836 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:42:58,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:42:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:42:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-23 06:42:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:42:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-23 06:42:58,874 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 9 [2020-12-23 06:42:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:58,875 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-23 06:42:58,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:42:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-23 06:42:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:42:58,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:58,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:42:58,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:42:58,877 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1565476563, now seen corresponding path program 1 times [2020-12-23 06:42:58,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:58,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794243647] [2020-12-23 06:42:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:59,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794243647] [2020-12-23 06:42:59,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598100382] [2020-12-23 06:42:59,046 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 06:42:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:59,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:42:59,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:59,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:59,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:42:59,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881397919] [2020-12-23 06:42:59,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:42:59,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:59,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:42:59,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:42:59,250 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 7 states. [2020-12-23 06:42:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:59,335 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-12-23 06:42:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:42:59,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-23 06:42:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:59,337 INFO L225 Difference]: With dead ends: 51 [2020-12-23 06:42:59,338 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:42:59,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:42:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:42:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2020-12-23 06:42:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:42:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-23 06:42:59,345 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 11 [2020-12-23 06:42:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:59,345 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-23 06:42:59,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:42:59,346 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-23 06:42:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:42:59,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:59,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:42:59,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:42:59,561 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:59,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1379565948, now seen corresponding path program 1 times [2020-12-23 06:42:59,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:59,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614314594] [2020-12-23 06:42:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:00,080 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 06:43:00,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614314594] [2020-12-23 06:43:00,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590997092] [2020-12-23 06:43:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:00,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:43:00,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:00,234 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:00,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:00,348 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 28 treesize of output 27 [2020-12-23 06:43:00,352 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:00,362 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:00,367 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 06:43:00,367 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:30 [2020-12-23 06:43:00,424 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:00,428 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:00,430 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:43:00,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:00,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2020-12-23 06:43:00,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044156373] [2020-12-23 06:43:00,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:43:00,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:00,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:43:00,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:43:00,451 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 18 states. [2020-12-23 06:43:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:01,125 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-12-23 06:43:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:43:01,125 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-12-23 06:43:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:01,127 INFO L225 Difference]: With dead ends: 77 [2020-12-23 06:43:01,127 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:43:01,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:43:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:43:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 38. [2020-12-23 06:43:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:43:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-23 06:43:01,137 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 19 [2020-12-23 06:43:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:01,137 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-23 06:43:01,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:43:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-23 06:43:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:43:01,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:01,138 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:01,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:01,353 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:01,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1125897754, now seen corresponding path program 1 times [2020-12-23 06:43:01,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:01,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204321209] [2020-12-23 06:43:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:01,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204321209] [2020-12-23 06:43:01,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790560503] [2020-12-23 06:43:01,576 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 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 06:43:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:01,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:43:01,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:01,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:01,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2020-12-23 06:43:01,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307258227] [2020-12-23 06:43:01,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:43:01,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:43:01,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:43:01,788 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 11 states. [2020-12-23 06:43:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:01,959 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2020-12-23 06:43:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:43:01,960 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-23 06:43:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:01,961 INFO L225 Difference]: With dead ends: 122 [2020-12-23 06:43:01,962 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:43:01,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:43:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:43:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2020-12-23 06:43:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 06:43:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-12-23 06:43:01,974 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 23 [2020-12-23 06:43:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:01,974 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-12-23 06:43:01,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:43:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-12-23 06:43:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:43:01,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:01,976 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:02,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:02,190 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:02,191 INFO L82 PathProgramCache]: Analyzing trace with hash -210329187, now seen corresponding path program 1 times [2020-12-23 06:43:02,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:02,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032893851] [2020-12-23 06:43:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:02,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032893851] [2020-12-23 06:43:02,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410413436] [2020-12-23 06:43:02,752 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 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 06:43:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:02,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:43:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:02,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:02,971 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-23 06:43:02,971 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 36 treesize of output 27 [2020-12-23 06:43:02,974 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:02,983 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:02,984 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:02,984 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-23 06:43:03,295 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-23 06:43:03,295 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 48 treesize of output 121 [2020-12-23 06:43:03,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:43:03,303 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:03,306 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:03,343 INFO L625 ElimStorePlain]: treesize reduction 97, result has 27.1 percent of original size [2020-12-23 06:43:03,349 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:43:03,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:33 [2020-12-23 06:43:03,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:03,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:03,492 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:03,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:03,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:43:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:43:03,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:03,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-12-23 06:43:03,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597004510] [2020-12-23 06:43:03,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:43:03,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:03,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:43:03,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:43:03,539 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 28 states. [2020-12-23 06:43:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:05,401 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2020-12-23 06:43:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:43:05,401 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 24 [2020-12-23 06:43:05,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:05,404 INFO L225 Difference]: With dead ends: 166 [2020-12-23 06:43:05,404 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 06:43:05,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=443, Invalid=2419, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:43:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 06:43:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 54. [2020-12-23 06:43:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 06:43:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-23 06:43:05,420 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 24 [2020-12-23 06:43:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:05,421 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-23 06:43:05,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:43:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-23 06:43:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:43:05,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:05,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:05,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:05,638 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:05,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:05,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1447473291, now seen corresponding path program 2 times [2020-12-23 06:43:05,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:05,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11409593] [2020-12-23 06:43:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:06,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11409593] [2020-12-23 06:43:06,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147138206] [2020-12-23 06:43:06,157 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 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 06:43:06,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:43:06,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:06,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:43:06,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:06,331 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:06,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:06,395 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 28 treesize of output 27 [2020-12-23 06:43:06,398 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:06,418 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:06,423 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 06:43:06,424 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:40 [2020-12-23 06:43:06,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:06,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:06,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:06,492 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:06,492 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 06:43:06,494 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:06,502 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:06,504 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 06:43:06,504 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-23 06:43:06,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:06,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:06,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:43:06,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:06,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-12-23 06:43:06,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82876745] [2020-12-23 06:43:06,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:43:06,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:06,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:43:06,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:43:06,553 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 17 states. [2020-12-23 06:43:07,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:07,024 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-12-23 06:43:07,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:43:07,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-12-23 06:43:07,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:07,026 INFO L225 Difference]: With dead ends: 95 [2020-12-23 06:43:07,026 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 06:43:07,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:43:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 06:43:07,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2020-12-23 06:43:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 06:43:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-12-23 06:43:07,038 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 27 [2020-12-23 06:43:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:07,038 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-12-23 06:43:07,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:43:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-12-23 06:43:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:43:07,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:07,040 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:07,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:43:07,253 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:07,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1913928053, now seen corresponding path program 2 times [2020-12-23 06:43:07,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:07,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929772963] [2020-12-23 06:43:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:07,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929772963] [2020-12-23 06:43:07,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784897210] [2020-12-23 06:43:07,532 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 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 06:43:07,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:43:07,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:07,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:43:07,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:07,718 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 16 treesize of output 12 [2020-12-23 06:43:07,719 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:07,727 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:07,729 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 06:43:07,729 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2020-12-23 06:43:07,747 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:07,768 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 06:43:07,769 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 23 treesize of output 22 [2020-12-23 06:43:07,770 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:07,775 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:07,776 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:07,776 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-23 06:43:07,858 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:07,862 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:07,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:43:07,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:07,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 18 [2020-12-23 06:43:07,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435238217] [2020-12-23 06:43:07,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:43:07,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:43:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:43:07,890 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 18 states. [2020-12-23 06:43:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:08,579 INFO L93 Difference]: Finished difference Result 183 states and 234 transitions. [2020-12-23 06:43:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:43:08,579 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-12-23 06:43:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:08,581 INFO L225 Difference]: With dead ends: 183 [2020-12-23 06:43:08,581 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 06:43:08,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:43:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 06:43:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-12-23 06:43:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 06:43:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2020-12-23 06:43:08,616 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 31 [2020-12-23 06:43:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:08,618 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2020-12-23 06:43:08,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:43:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2020-12-23 06:43:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:43:08,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:08,622 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:08,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:08,836 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:08,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:08,837 INFO L82 PathProgramCache]: Analyzing trace with hash -635707062, now seen corresponding path program 1 times [2020-12-23 06:43:08,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:08,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574661070] [2020-12-23 06:43:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:09,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574661070] [2020-12-23 06:43:09,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901871490] [2020-12-23 06:43:09,220 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 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 06:43:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:09,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:43:09,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:09,444 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:09,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:09,474 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 28 treesize of output 27 [2020-12-23 06:43:09,476 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:09,486 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:09,490 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 06:43:09,490 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:35 [2020-12-23 06:43:09,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:09,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:09,560 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:43:09,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:09,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2020-12-23 06:43:09,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10716685] [2020-12-23 06:43:09,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:43:09,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:09,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:43:09,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:43:09,588 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand 19 states. [2020-12-23 06:43:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:11,511 INFO L93 Difference]: Finished difference Result 235 states and 295 transitions. [2020-12-23 06:43:11,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:43:11,512 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-12-23 06:43:11,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:11,514 INFO L225 Difference]: With dead ends: 235 [2020-12-23 06:43:11,514 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 06:43:11,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=652, Invalid=3130, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:43:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 06:43:11,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 95. [2020-12-23 06:43:11,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 06:43:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2020-12-23 06:43:11,530 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 32 [2020-12-23 06:43:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:11,530 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2020-12-23 06:43:11,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:43:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2020-12-23 06:43:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:43:11,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:11,532 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:11,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:11,740 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 222375954, now seen corresponding path program 2 times [2020-12-23 06:43:11,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:11,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081475282] [2020-12-23 06:43:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:12,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081475282] [2020-12-23 06:43:12,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388520413] [2020-12-23 06:43:12,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:12,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:43:12,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:12,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:43:12,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:12,538 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:12,623 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-23 06:43:12,624 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 36 treesize of output 27 [2020-12-23 06:43:12,625 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:12,637 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:12,638 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:12,638 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:43 [2020-12-23 06:43:12,972 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-23 06:43:12,973 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 48 treesize of output 121 [2020-12-23 06:43:12,975 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:43:12,976 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:12,984 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:13,030 INFO L625 ElimStorePlain]: treesize reduction 99, result has 28.3 percent of original size [2020-12-23 06:43:13,034 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:43:13,034 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:36 [2020-12-23 06:43:13,270 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:13,271 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 35 treesize of output 125 [2020-12-23 06:43:13,273 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:13,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:13,276 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:13,317 INFO L625 ElimStorePlain]: treesize reduction 57, result has 42.4 percent of original size [2020-12-23 06:43:13,321 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:43:13,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:33 [2020-12-23 06:43:13,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:13,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:13,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:13,468 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:13,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:43:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:43:13,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:13,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2020-12-23 06:43:13,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603215200] [2020-12-23 06:43:13,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:43:13,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:13,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:43:13,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:43:13,511 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 33 states. [2020-12-23 06:43:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:14,666 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2020-12-23 06:43:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:43:14,666 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2020-12-23 06:43:14,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:14,667 INFO L225 Difference]: With dead ends: 124 [2020-12-23 06:43:14,667 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 06:43:14,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:43:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 06:43:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2020-12-23 06:43:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 06:43:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2020-12-23 06:43:14,683 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 32 [2020-12-23 06:43:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:14,683 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2020-12-23 06:43:14,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:43:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2020-12-23 06:43:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 06:43:14,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:14,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:14,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:43:14,899 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1757363551, now seen corresponding path program 3 times [2020-12-23 06:43:14,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:14,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924577609] [2020-12-23 06:43:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:15,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924577609] [2020-12-23 06:43:15,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615171894] [2020-12-23 06:43:15,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:15,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:43:15,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:15,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:43:15,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:43:15,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:15,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2020-12-23 06:43:15,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718775003] [2020-12-23 06:43:15,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:43:15,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:15,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:43:15,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:43:15,602 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand 14 states. [2020-12-23 06:43:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:15,957 INFO L93 Difference]: Finished difference Result 267 states and 336 transitions. [2020-12-23 06:43:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:43:15,957 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-12-23 06:43:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:15,959 INFO L225 Difference]: With dead ends: 267 [2020-12-23 06:43:15,959 INFO L226 Difference]: Without dead ends: 205 [2020-12-23 06:43:15,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:43:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-23 06:43:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2020-12-23 06:43:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 06:43:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 198 transitions. [2020-12-23 06:43:15,981 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 198 transitions. Word has length 35 [2020-12-23 06:43:15,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:15,981 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 198 transitions. [2020-12-23 06:43:15,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:43:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 198 transitions. [2020-12-23 06:43:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:43:15,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:15,983 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:16,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:16,199 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:16,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1000905248, now seen corresponding path program 1 times [2020-12-23 06:43:16,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:16,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520666431] [2020-12-23 06:43:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:16,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520666431] [2020-12-23 06:43:16,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59126498] [2020-12-23 06:43:16,493 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 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 06:43:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:16,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:43:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:16,583 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:16,610 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-23 06:43:16,611 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 38 treesize of output 29 [2020-12-23 06:43:16,612 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:16,619 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:16,619 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:16,620 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2020-12-23 06:43:16,795 INFO L348 Elim1Store]: treesize reduction 12, result has 87.4 percent of original size [2020-12-23 06:43:16,796 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 43 treesize of output 103 [2020-12-23 06:43:16,798 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:43:16,798 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:16,800 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:16,827 INFO L625 ElimStorePlain]: treesize reduction 72, result has 29.4 percent of original size [2020-12-23 06:43:16,829 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 06:43:16,829 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:27 [2020-12-23 06:43:16,940 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:16,941 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:16,943 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:43:16,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:16,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 21 [2020-12-23 06:43:16,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782361496] [2020-12-23 06:43:16,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:43:16,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:43:16,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:43:16,977 INFO L87 Difference]: Start difference. First operand 163 states and 198 transitions. Second operand 21 states. [2020-12-23 06:43:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:17,711 INFO L93 Difference]: Finished difference Result 193 states and 234 transitions. [2020-12-23 06:43:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:43:17,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-12-23 06:43:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:17,714 INFO L225 Difference]: With dead ends: 193 [2020-12-23 06:43:17,714 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 06:43:17,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:43:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 06:43:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 165. [2020-12-23 06:43:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 06:43:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 201 transitions. [2020-12-23 06:43:17,731 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 201 transitions. Word has length 36 [2020-12-23 06:43:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:17,732 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 201 transitions. [2020-12-23 06:43:17,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:43:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 201 transitions. [2020-12-23 06:43:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 06:43:17,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:17,733 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:17,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:17,948 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:17,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1716712809, now seen corresponding path program 3 times [2020-12-23 06:43:17,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:17,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510883961] [2020-12-23 06:43:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:18,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510883961] [2020-12-23 06:43:18,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732171856] [2020-12-23 06:43:18,553 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 06:43:18,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:43:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:18,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:43:18,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:18,724 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:18,795 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-23 06:43:18,796 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 36 treesize of output 27 [2020-12-23 06:43:18,797 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:18,804 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:18,804 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:18,805 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-23 06:43:18,979 INFO L348 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2020-12-23 06:43:18,980 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 2 case distinctions, treesize of input 50 treesize of output 31 [2020-12-23 06:43:18,981 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:19,007 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:19,009 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 06:43:19,009 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:30 [2020-12-23 06:43:19,118 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:19,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:19,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:19,124 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:19,126 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:43:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 06:43:19,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:19,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2020-12-23 06:43:19,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787881870] [2020-12-23 06:43:19,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:43:19,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:19,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:43:19,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:43:19,163 INFO L87 Difference]: Start difference. First operand 165 states and 201 transitions. Second operand 31 states. [2020-12-23 06:43:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:22,769 INFO L93 Difference]: Finished difference Result 304 states and 367 transitions. [2020-12-23 06:43:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:43:22,770 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2020-12-23 06:43:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:22,772 INFO L225 Difference]: With dead ends: 304 [2020-12-23 06:43:22,772 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 06:43:22,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=941, Invalid=6891, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 06:43:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 06:43:22,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 132. [2020-12-23 06:43:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 06:43:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2020-12-23 06:43:22,790 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 37 [2020-12-23 06:43:22,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:22,790 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2020-12-23 06:43:22,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:43:22,790 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2020-12-23 06:43:22,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:43:22,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:22,791 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:23,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:43:23,005 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash -336019396, now seen corresponding path program 4 times [2020-12-23 06:43:23,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:23,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575960727] [2020-12-23 06:43:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:23,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575960727] [2020-12-23 06:43:23,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523408442] [2020-12-23 06:43:23,611 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 06:43:23,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:43:23,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:43:23,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:23,704 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 16 treesize of output 12 [2020-12-23 06:43:23,705 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:23,713 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:23,714 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 06:43:23,715 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:10 [2020-12-23 06:43:23,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:23,761 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 0 case distinctions, treesize of input 32 treesize of output 27 [2020-12-23 06:43:23,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:23,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:23,772 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 24 [2020-12-23 06:43:23,773 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:23,779 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:23,780 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:23,790 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:23,791 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:23,791 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:26 [2020-12-23 06:43:23,929 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 0 case distinctions, treesize of input 42 treesize of output 35 [2020-12-23 06:43:23,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:23,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:23,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:23,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:23,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:23,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:23,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:23,942 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 36 [2020-12-23 06:43:23,943 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:23,948 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:23,949 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:23,959 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:23,961 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 06:43:23,962 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:31 [2020-12-23 06:43:24,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:24,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:24,093 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:43:24,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:24,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 23 [2020-12-23 06:43:24,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262035415] [2020-12-23 06:43:24,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:43:24,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:24,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:43:24,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:43:24,128 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand 23 states. [2020-12-23 06:43:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:25,030 INFO L93 Difference]: Finished difference Result 258 states and 317 transitions. [2020-12-23 06:43:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:43:25,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-12-23 06:43:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:25,032 INFO L225 Difference]: With dead ends: 258 [2020-12-23 06:43:25,032 INFO L226 Difference]: Without dead ends: 222 [2020-12-23 06:43:25,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:43:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-23 06:43:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 158. [2020-12-23 06:43:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 06:43:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2020-12-23 06:43:25,053 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 39 [2020-12-23 06:43:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:25,054 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2020-12-23 06:43:25,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:43:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2020-12-23 06:43:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:43:25,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:25,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:25,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:43:25,272 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:25,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1292986487, now seen corresponding path program 1 times [2020-12-23 06:43:25,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:25,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303978438] [2020-12-23 06:43:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:26,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303978438] [2020-12-23 06:43:26,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802883787] [2020-12-23 06:43:26,095 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 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 06:43:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:26,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:43:26,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:26,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:26,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:26,279 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 34 treesize of output 33 [2020-12-23 06:43:26,281 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:26,298 INFO L625 ElimStorePlain]: treesize reduction 7, result has 83.7 percent of original size [2020-12-23 06:43:26,300 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:26,300 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:33 [2020-12-23 06:43:26,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:26,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:26,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:26,408 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:26,408 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 06:43:26,413 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:26,422 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:26,424 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 06:43:26,424 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-23 06:43:26,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:26,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:26,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:26,453 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:26,453 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 06:43:26,454 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:26,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:26,466 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 06:43:26,466 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-23 06:43:26,495 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:26,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:26,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 06:43:26,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:26,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 26 [2020-12-23 06:43:26,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518649552] [2020-12-23 06:43:26,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:43:26,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:26,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:43:26,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:43:26,526 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand 26 states. [2020-12-23 06:43:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:27,953 INFO L93 Difference]: Finished difference Result 285 states and 341 transitions. [2020-12-23 06:43:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:43:27,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 40 [2020-12-23 06:43:27,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:27,956 INFO L225 Difference]: With dead ends: 285 [2020-12-23 06:43:27,956 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 06:43:27,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=404, Invalid=1852, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:43:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 06:43:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 161. [2020-12-23 06:43:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 06:43:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2020-12-23 06:43:27,977 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 40 [2020-12-23 06:43:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:27,977 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2020-12-23 06:43:27,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:43:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2020-12-23 06:43:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:43:27,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:27,978 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:28,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:43:28,194 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:28,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1122199553, now seen corresponding path program 2 times [2020-12-23 06:43:28,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:28,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208641881] [2020-12-23 06:43:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:28,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208641881] [2020-12-23 06:43:28,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088619238] [2020-12-23 06:43:28,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:29,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:43:29,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:43:29,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:29,208 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:29,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:29,344 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 28 treesize of output 27 [2020-12-23 06:43:29,345 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:29,374 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:29,376 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 06:43:29,376 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:35 [2020-12-23 06:43:29,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:29,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:29,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:29,528 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:29,529 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 06:43:29,530 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:29,539 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:29,541 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 06:43:29,541 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-23 06:43:29,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:29,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:29,575 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:43:29,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:29,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 29 [2020-12-23 06:43:29,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575090637] [2020-12-23 06:43:29,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:43:29,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:29,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:43:29,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:43:29,615 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand 29 states. [2020-12-23 06:43:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:32,277 INFO L93 Difference]: Finished difference Result 283 states and 341 transitions. [2020-12-23 06:43:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:43:32,277 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-12-23 06:43:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:32,279 INFO L225 Difference]: With dead ends: 283 [2020-12-23 06:43:32,279 INFO L226 Difference]: Without dead ends: 248 [2020-12-23 06:43:32,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=744, Invalid=3162, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:43:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-23 06:43:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 175. [2020-12-23 06:43:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 06:43:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2020-12-23 06:43:32,302 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 40 [2020-12-23 06:43:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:32,302 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2020-12-23 06:43:32,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:43:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2020-12-23 06:43:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:43:32,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:32,303 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:32,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:32,517 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:32,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1167216441, now seen corresponding path program 4 times [2020-12-23 06:43:32,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:32,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238356225] [2020-12-23 06:43:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:43:33,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238356225] [2020-12-23 06:43:33,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975647679] [2020-12-23 06:43:33,248 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 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 06:43:33,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:43:33,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:33,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:43:33,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:33,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:33,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:33,475 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 36 treesize of output 27 [2020-12-23 06:43:33,476 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:33,494 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:33,495 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:33,495 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:45 [2020-12-23 06:43:33,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:33,756 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:33,756 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 50 treesize of output 31 [2020-12-23 06:43:33,757 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:33,773 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:33,775 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 06:43:33,775 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:39 [2020-12-23 06:43:33,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:33,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:33,876 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:33,877 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2020-12-23 06:43:33,878 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:33,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:33,892 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:33,893 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2020-12-23 06:43:34,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:34,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:34,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:34,058 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:34,059 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2020-12-23 06:43:34,060 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:34,071 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:34,073 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 06:43:34,073 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:19 [2020-12-23 06:43:34,109 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:34,111 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:34,112 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:43:34,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:34,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2020-12-23 06:43:34,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901713511] [2020-12-23 06:43:34,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:43:34,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:34,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:43:34,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:43:34,153 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand 32 states. [2020-12-23 06:43:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:35,468 INFO L93 Difference]: Finished difference Result 300 states and 368 transitions. [2020-12-23 06:43:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:43:35,469 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-12-23 06:43:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:35,470 INFO L225 Difference]: With dead ends: 300 [2020-12-23 06:43:35,470 INFO L226 Difference]: Without dead ends: 242 [2020-12-23 06:43:35,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:43:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-23 06:43:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 183. [2020-12-23 06:43:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 06:43:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 225 transitions. [2020-12-23 06:43:35,494 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 225 transitions. Word has length 40 [2020-12-23 06:43:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:35,494 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 225 transitions. [2020-12-23 06:43:35,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:43:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 225 transitions. [2020-12-23 06:43:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 06:43:35,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:35,495 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:35,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:43:35,696 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:35,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1721163603, now seen corresponding path program 1 times [2020-12-23 06:43:35,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:35,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305697421] [2020-12-23 06:43:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:36,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305697421] [2020-12-23 06:43:36,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639238340] [2020-12-23 06:43:36,781 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 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 06:43:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:36,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:43:36,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:36,920 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:36,943 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 34 treesize of output 33 [2020-12-23 06:43:36,944 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:36,964 INFO L625 ElimStorePlain]: treesize reduction 7, result has 83.7 percent of original size [2020-12-23 06:43:36,965 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:36,966 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:33 [2020-12-23 06:43:37,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,085 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:43:37,086 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:37,087 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 46 [2020-12-23 06:43:37,088 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:37,108 INFO L625 ElimStorePlain]: treesize reduction 17, result has 71.2 percent of original size [2020-12-23 06:43:37,109 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:37,109 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:42 [2020-12-23 06:43:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,380 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:43:37,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,383 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:43:37,385 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:37,386 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 58 [2020-12-23 06:43:37,387 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:37,412 INFO L625 ElimStorePlain]: treesize reduction 35, result has 52.1 percent of original size [2020-12-23 06:43:37,413 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:37,414 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:32 [2020-12-23 06:43:37,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:37,631 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:37,632 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 70 [2020-12-23 06:43:37,634 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:37,671 INFO L625 ElimStorePlain]: treesize reduction 17, result has 76.7 percent of original size [2020-12-23 06:43:37,673 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:37,674 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 06:43:37,675 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:50 [2020-12-23 06:43:37,883 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:37,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:37,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:43:37,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:37,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 38 [2020-12-23 06:43:37,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300285984] [2020-12-23 06:43:37,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:43:37,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:43:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:43:37,927 INFO L87 Difference]: Start difference. First operand 183 states and 225 transitions. Second operand 38 states. [2020-12-23 06:43:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:43,467 INFO L93 Difference]: Finished difference Result 426 states and 526 transitions. [2020-12-23 06:43:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 06:43:43,467 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-12-23 06:43:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:43,469 INFO L225 Difference]: With dead ends: 426 [2020-12-23 06:43:43,470 INFO L226 Difference]: Without dead ends: 351 [2020-12-23 06:43:43,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3115 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1226, Invalid=8280, Unknown=0, NotChecked=0, Total=9506 [2020-12-23 06:43:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-23 06:43:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 249. [2020-12-23 06:43:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-23 06:43:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 316 transitions. [2020-12-23 06:43:43,504 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 316 transitions. Word has length 41 [2020-12-23 06:43:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:43,504 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 316 transitions. [2020-12-23 06:43:43,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:43:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 316 transitions. [2020-12-23 06:43:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 06:43:43,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:43,505 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:43,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:43:43,719 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash -840467502, now seen corresponding path program 5 times [2020-12-23 06:43:43,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:43,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479179870] [2020-12-23 06:43:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:44,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479179870] [2020-12-23 06:43:44,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127558090] [2020-12-23 06:43:44,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:44,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 06:43:44,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:43:44,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:44,498 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 06:43:44,499 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:44,507 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:44,508 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:44,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2020-12-23 06:43:44,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:44,598 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 0 case distinctions, treesize of input 34 treesize of output 29 [2020-12-23 06:43:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:44,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:44,613 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2020-12-23 06:43:44,614 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:44,620 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:44,621 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:44,632 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:44,634 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 06:43:44,635 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:47, output treesize:32 [2020-12-23 06:43:44,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:44,784 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:44,785 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:44,787 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:44,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:43:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:43:44,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:44,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-12-23 06:43:44,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055629926] [2020-12-23 06:43:44,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:43:44,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:44,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:43:44,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:43:44,819 INFO L87 Difference]: Start difference. First operand 249 states and 316 transitions. Second operand 19 states. [2020-12-23 06:43:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:46,014 INFO L93 Difference]: Finished difference Result 561 states and 741 transitions. [2020-12-23 06:43:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:43:46,014 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-12-23 06:43:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:46,016 INFO L225 Difference]: With dead ends: 561 [2020-12-23 06:43:46,017 INFO L226 Difference]: Without dead ends: 418 [2020-12-23 06:43:46,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:43:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-12-23 06:43:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 273. [2020-12-23 06:43:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-23 06:43:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 344 transitions. [2020-12-23 06:43:46,054 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 344 transitions. Word has length 43 [2020-12-23 06:43:46,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:46,055 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 344 transitions. [2020-12-23 06:43:46,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:43:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 344 transitions. [2020-12-23 06:43:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:43:46,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:46,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:46,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:43:46,260 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:46,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash 632000141, now seen corresponding path program 1 times [2020-12-23 06:43:46,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:46,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573160693] [2020-12-23 06:43:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:46,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573160693] [2020-12-23 06:43:46,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991276957] [2020-12-23 06:43:46,566 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 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 06:43:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:46,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:43:46,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:46,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:46,769 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:46,787 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 06:43:46,788 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 23 treesize of output 22 [2020-12-23 06:43:46,789 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:46,795 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:46,796 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:46,796 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-23 06:43:46,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:46,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:46,870 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:43:46,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:46,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 23 [2020-12-23 06:43:46,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141695669] [2020-12-23 06:43:46,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:43:46,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:46,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:43:46,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:43:46,898 INFO L87 Difference]: Start difference. First operand 273 states and 344 transitions. Second operand 23 states. [2020-12-23 06:43:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:48,339 INFO L93 Difference]: Finished difference Result 577 states and 757 transitions. [2020-12-23 06:43:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:43:48,340 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-23 06:43:48,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:48,342 INFO L225 Difference]: With dead ends: 577 [2020-12-23 06:43:48,342 INFO L226 Difference]: Without dead ends: 461 [2020-12-23 06:43:48,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=373, Invalid=2077, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:43:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-12-23 06:43:48,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 310. [2020-12-23 06:43:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-23 06:43:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 397 transitions. [2020-12-23 06:43:48,394 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 397 transitions. Word has length 44 [2020-12-23 06:43:48,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:48,395 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 397 transitions. [2020-12-23 06:43:48,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:43:48,395 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 397 transitions. [2020-12-23 06:43:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:43:48,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:48,396 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:48,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:48,610 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:48,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:48,611 INFO L82 PathProgramCache]: Analyzing trace with hash 906213909, now seen corresponding path program 2 times [2020-12-23 06:43:48,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:48,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195948730] [2020-12-23 06:43:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:49,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195948730] [2020-12-23 06:43:49,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682494657] [2020-12-23 06:43:49,260 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 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 06:43:49,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:43:49,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:43:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:49,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:49,513 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-23 06:43:49,513 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 36 treesize of output 27 [2020-12-23 06:43:49,515 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:49,527 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:49,528 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:49,528 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:44 [2020-12-23 06:43:49,867 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-23 06:43:49,867 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 48 treesize of output 121 [2020-12-23 06:43:49,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:43:49,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:49,874 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:49,917 INFO L625 ElimStorePlain]: treesize reduction 99, result has 26.1 percent of original size [2020-12-23 06:43:49,918 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 06:43:49,918 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:27 [2020-12-23 06:43:50,093 INFO L348 Elim1Store]: treesize reduction 12, result has 87.4 percent of original size [2020-12-23 06:43:50,093 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 34 treesize of output 100 [2020-12-23 06:43:50,095 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:50,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:50,099 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:50,126 INFO L625 ElimStorePlain]: treesize reduction 43, result has 43.4 percent of original size [2020-12-23 06:43:50,128 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 06:43:50,128 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:17 [2020-12-23 06:43:50,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:50,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:50,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:43:50,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:50,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 33 [2020-12-23 06:43:50,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695124256] [2020-12-23 06:43:50,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:43:50,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:43:50,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:43:50,326 INFO L87 Difference]: Start difference. First operand 310 states and 397 transitions. Second operand 33 states. [2020-12-23 06:43:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:52,849 INFO L93 Difference]: Finished difference Result 452 states and 578 transitions. [2020-12-23 06:43:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:43:52,850 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-12-23 06:43:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:52,852 INFO L225 Difference]: With dead ends: 452 [2020-12-23 06:43:52,852 INFO L226 Difference]: Without dead ends: 373 [2020-12-23 06:43:52,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=482, Invalid=3300, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:43:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-12-23 06:43:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 320. [2020-12-23 06:43:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-12-23 06:43:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 412 transitions. [2020-12-23 06:43:52,896 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 412 transitions. Word has length 44 [2020-12-23 06:43:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:52,896 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 412 transitions. [2020-12-23 06:43:52,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:43:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 412 transitions. [2020-12-23 06:43:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 06:43:52,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:52,898 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:53,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:53,112 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:53,113 INFO L82 PathProgramCache]: Analyzing trace with hash 647596744, now seen corresponding path program 1 times [2020-12-23 06:43:53,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:53,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934048189] [2020-12-23 06:43:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 06:43:53,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934048189] [2020-12-23 06:43:53,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:43:53,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:43:53,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875261996] [2020-12-23 06:43:53,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:43:53,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:53,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:43:53,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:43:53,139 INFO L87 Difference]: Start difference. First operand 320 states and 412 transitions. Second operand 3 states. [2020-12-23 06:43:53,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:53,182 INFO L93 Difference]: Finished difference Result 382 states and 497 transitions. [2020-12-23 06:43:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:43:53,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-23 06:43:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:53,185 INFO L225 Difference]: With dead ends: 382 [2020-12-23 06:43:53,185 INFO L226 Difference]: Without dead ends: 303 [2020-12-23 06:43:53,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:43:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-12-23 06:43:53,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 296. [2020-12-23 06:43:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-12-23 06:43:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 371 transitions. [2020-12-23 06:43:53,223 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 371 transitions. Word has length 45 [2020-12-23 06:43:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:53,224 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 371 transitions. [2020-12-23 06:43:53,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:43:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 371 transitions. [2020-12-23 06:43:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 06:43:53,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:53,225 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:53,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 06:43:53,225 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:53,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:53,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1747430856, now seen corresponding path program 5 times [2020-12-23 06:43:53,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:53,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158559831] [2020-12-23 06:43:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:43:53,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158559831] [2020-12-23 06:43:53,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633519437] [2020-12-23 06:43:53,963 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 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 06:43:54,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:43:54,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:54,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:43:54,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:54,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:54,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:54,600 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 36 treesize of output 27 [2020-12-23 06:43:54,602 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:54,618 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:54,619 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:54,619 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:47 [2020-12-23 06:43:54,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:54,783 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:54,783 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 50 treesize of output 31 [2020-12-23 06:43:54,784 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:54,796 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:54,797 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:54,797 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:31 [2020-12-23 06:43:54,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:54,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:54,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:54,977 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:54,977 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2020-12-23 06:43:54,978 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:54,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:54,989 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 06:43:54,989 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:19 [2020-12-23 06:43:55,025 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:55,027 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:55,028 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:43:55,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:55,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 34 [2020-12-23 06:43:55,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002027561] [2020-12-23 06:43:55,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:43:55,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:55,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:43:55,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:43:55,072 INFO L87 Difference]: Start difference. First operand 296 states and 371 transitions. Second operand 34 states. [2020-12-23 06:43:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:58,181 INFO L93 Difference]: Finished difference Result 656 states and 819 transitions. [2020-12-23 06:43:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:43:58,186 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-12-23 06:43:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:58,188 INFO L225 Difference]: With dead ends: 656 [2020-12-23 06:43:58,189 INFO L226 Difference]: Without dead ends: 552 [2020-12-23 06:43:58,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=704, Invalid=4996, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:43:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-12-23 06:43:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 369. [2020-12-23 06:43:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-12-23 06:43:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 470 transitions. [2020-12-23 06:43:58,241 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 470 transitions. Word has length 45 [2020-12-23 06:43:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:58,241 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 470 transitions. [2020-12-23 06:43:58,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:43:58,241 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 470 transitions. [2020-12-23 06:43:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:43:58,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:58,242 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:58,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:43:58,458 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:58,459 INFO L82 PathProgramCache]: Analyzing trace with hash -583456118, now seen corresponding path program 2 times [2020-12-23 06:43:58,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:58,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808271734] [2020-12-23 06:43:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:59,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808271734] [2020-12-23 06:43:59,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155471551] [2020-12-23 06:43:59,553 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 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 06:43:59,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:43:59,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:59,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:43:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:59,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:59,847 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-23 06:43:59,847 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 36 treesize of output 27 [2020-12-23 06:43:59,849 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:59,866 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:59,866 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:59,867 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:44 [2020-12-23 06:44:00,205 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-23 06:44:00,205 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 49 treesize of output 121 [2020-12-23 06:44:00,207 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:00,208 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:00,211 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:00,256 INFO L625 ElimStorePlain]: treesize reduction 99, result has 28.3 percent of original size [2020-12-23 06:44:00,259 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:44:00,259 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:36 [2020-12-23 06:44:00,562 INFO L348 Elim1Store]: treesize reduction 72, result has 65.4 percent of original size [2020-12-23 06:44:00,563 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 151 [2020-12-23 06:44:00,565 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:00,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:00,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:00,569 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:00,627 INFO L625 ElimStorePlain]: treesize reduction 81, result has 40.9 percent of original size [2020-12-23 06:44:00,629 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 06:44:00,629 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:56 [2020-12-23 06:44:01,271 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2020-12-23 06:44:01,272 INFO L348 Elim1Store]: treesize reduction 112, result has 71.3 percent of original size [2020-12-23 06:44:01,272 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 296 [2020-12-23 06:44:01,276 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-12-23 06:44:01,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:44:01,277 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-12-23 06:44:01,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:44:01,278 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-23 06:44:01,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:01,279 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-23 06:44:01,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,279 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-23 06:44:01,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,283 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,283 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:01,284 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,284 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,289 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:44:01,289 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:44:01,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:01,293 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,293 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,298 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,301 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,301 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,304 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,304 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,305 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,305 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,306 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,307 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:44:01,308 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:44:01,311 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:01,311 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,314 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:01,315 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:01,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:01,346 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:01,530 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 30 [2020-12-23 06:44:01,531 INFO L625 ElimStorePlain]: treesize reduction 871, result has 6.0 percent of original size [2020-12-23 06:44:01,533 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:44:01,534 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:78, output treesize:53 [2020-12-23 06:44:02,099 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-23 06:44:02,099 INFO L348 Elim1Store]: treesize reduction 17, result has 94.2 percent of original size [2020-12-23 06:44:02,100 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 294 [2020-12-23 06:44:02,107 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-12-23 06:44:02,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:44:02,108 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-12-23 06:44:02,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:44:02,109 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-23 06:44:02,110 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:02,110 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-23 06:44:02,110 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,111 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-23 06:44:02,111 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,118 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,118 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,122 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:44:02,123 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,124 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,126 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:44:02,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:44:02,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:02,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,128 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,130 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:44:02,130 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,131 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,133 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,134 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,135 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,135 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,136 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-23 06:44:02,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,138 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-23 06:44:02,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,139 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-23 06:44:02,140 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,141 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,141 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,143 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:02,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,146 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:02,147 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,148 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,150 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:02,150 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,151 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,164 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:02,468 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 38 [2020-12-23 06:44:02,469 INFO L625 ElimStorePlain]: treesize reduction 1125, result has 7.9 percent of original size [2020-12-23 06:44:02,472 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:02,473 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,474 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,475 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,477 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,477 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:44:02,480 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 06:44:02,480 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:78 [2020-12-23 06:44:02,481 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,482 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:44:02,564 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,567 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:44:02,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,677 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,678 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:44:02,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,792 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:02,793 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:44:03,132 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:03,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:03,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:03,140 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:03,141 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:44:03,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:03,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-12-23 06:44:03,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437169342] [2020-12-23 06:44:03,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 06:44:03,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:03,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 06:44:03,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2245, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:44:03,220 INFO L87 Difference]: Start difference. First operand 369 states and 470 transitions. Second operand 50 states. [2020-12-23 06:44:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:06,901 INFO L93 Difference]: Finished difference Result 444 states and 554 transitions. [2020-12-23 06:44:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:44:06,902 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 46 [2020-12-23 06:44:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:06,904 INFO L225 Difference]: With dead ends: 444 [2020-12-23 06:44:06,905 INFO L226 Difference]: Without dead ends: 406 [2020-12-23 06:44:06,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=528, Invalid=5324, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:44:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-23 06:44:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 302. [2020-12-23 06:44:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-23 06:44:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 396 transitions. [2020-12-23 06:44:06,946 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 396 transitions. Word has length 46 [2020-12-23 06:44:06,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:06,946 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 396 transitions. [2020-12-23 06:44:06,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 06:44:06,946 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 396 transitions. [2020-12-23 06:44:06,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 06:44:06,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:06,948 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:07,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:44:07,160 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1547861096, now seen corresponding path program 6 times [2020-12-23 06:44:07,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:07,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462052436] [2020-12-23 06:44:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 06:44:07,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462052436] [2020-12-23 06:44:07,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517154310] [2020-12-23 06:44:07,472 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 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 06:44:07,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 06:44:07,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:44:07,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:44:07,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 06:44:07,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:07,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2020-12-23 06:44:07,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449738992] [2020-12-23 06:44:07,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:44:07,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:07,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:44:07,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:44:07,976 INFO L87 Difference]: Start difference. First operand 302 states and 396 transitions. Second operand 20 states. [2020-12-23 06:44:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:08,631 INFO L93 Difference]: Finished difference Result 828 states and 1079 transitions. [2020-12-23 06:44:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:44:08,632 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-12-23 06:44:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:08,635 INFO L225 Difference]: With dead ends: 828 [2020-12-23 06:44:08,635 INFO L226 Difference]: Without dead ends: 620 [2020-12-23 06:44:08,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:44:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-12-23 06:44:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 406. [2020-12-23 06:44:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-12-23 06:44:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 512 transitions. [2020-12-23 06:44:08,700 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 512 transitions. Word has length 47 [2020-12-23 06:44:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:08,701 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 512 transitions. [2020-12-23 06:44:08,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:44:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 512 transitions. [2020-12-23 06:44:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:44:08,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:08,702 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:08,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:08,916 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:08,917 INFO L82 PathProgramCache]: Analyzing trace with hash 972601763, now seen corresponding path program 2 times [2020-12-23 06:44:08,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:08,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039847574] [2020-12-23 06:44:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:09,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039847574] [2020-12-23 06:44:09,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639507653] [2020-12-23 06:44:09,494 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 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 06:44:09,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:44:09,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:44:09,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:44:09,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:09,711 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 0 case distinctions, treesize of input 26 treesize of output 21 [2020-12-23 06:44:09,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:09,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:09,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:09,721 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2020-12-23 06:44:09,722 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:09,728 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:09,729 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:09,736 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:09,737 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:09,738 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:17 [2020-12-23 06:44:09,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:09,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:09,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:09,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:09,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:44:09,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:09,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 21 [2020-12-23 06:44:09,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010538869] [2020-12-23 06:44:09,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:44:09,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:09,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:44:09,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:44:09,913 INFO L87 Difference]: Start difference. First operand 406 states and 512 transitions. Second operand 21 states. [2020-12-23 06:44:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:11,339 INFO L93 Difference]: Finished difference Result 504 states and 639 transitions. [2020-12-23 06:44:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:44:11,340 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-12-23 06:44:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:11,342 INFO L225 Difference]: With dead ends: 504 [2020-12-23 06:44:11,342 INFO L226 Difference]: Without dead ends: 487 [2020-12-23 06:44:11,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:44:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-12-23 06:44:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 386. [2020-12-23 06:44:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-12-23 06:44:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 484 transitions. [2020-12-23 06:44:11,390 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 484 transitions. Word has length 48 [2020-12-23 06:44:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:11,390 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 484 transitions. [2020-12-23 06:44:11,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:44:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 484 transitions. [2020-12-23 06:44:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 06:44:11,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:11,391 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:11,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 06:44:11,603 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:11,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2023640862, now seen corresponding path program 1 times [2020-12-23 06:44:11,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:11,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479599967] [2020-12-23 06:44:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:44:12,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479599967] [2020-12-23 06:44:12,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789880102] [2020-12-23 06:44:12,179 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 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 06:44:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:12,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:44:12,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:12,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:12,503 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-23 06:44:12,503 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 36 treesize of output 27 [2020-12-23 06:44:12,504 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:12,514 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:12,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:12,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-23 06:44:12,873 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-23 06:44:12,874 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 48 treesize of output 121 [2020-12-23 06:44:12,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:12,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:12,879 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:12,926 INFO L625 ElimStorePlain]: treesize reduction 98, result has 26.3 percent of original size [2020-12-23 06:44:12,928 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 06:44:12,928 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:27 [2020-12-23 06:44:13,092 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:13,093 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:13,094 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:44:13,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:13,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 34 [2020-12-23 06:44:13,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318020798] [2020-12-23 06:44:13,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:44:13,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:13,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:44:13,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:44:13,144 INFO L87 Difference]: Start difference. First operand 386 states and 484 transitions. Second operand 34 states. [2020-12-23 06:44:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:18,078 INFO L93 Difference]: Finished difference Result 647 states and 795 transitions. [2020-12-23 06:44:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 06:44:18,079 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 49 [2020-12-23 06:44:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:18,082 INFO L225 Difference]: With dead ends: 647 [2020-12-23 06:44:18,082 INFO L226 Difference]: Without dead ends: 537 [2020-12-23 06:44:18,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4007 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1150, Invalid=10192, Unknown=0, NotChecked=0, Total=11342 [2020-12-23 06:44:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-12-23 06:44:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 362. [2020-12-23 06:44:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-12-23 06:44:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 438 transitions. [2020-12-23 06:44:18,143 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 438 transitions. Word has length 49 [2020-12-23 06:44:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:18,143 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 438 transitions. [2020-12-23 06:44:18,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:44:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 438 transitions. [2020-12-23 06:44:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 06:44:18,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:18,144 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:18,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:18,346 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash 503230019, now seen corresponding path program 7 times [2020-12-23 06:44:18,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:18,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616744514] [2020-12-23 06:44:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:44:19,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616744514] [2020-12-23 06:44:19,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957747008] [2020-12-23 06:44:19,019 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 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 06:44:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:44:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:19,163 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 06:44:19,164 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:19,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:19,176 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:19,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2020-12-23 06:44:19,229 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:19,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:19,338 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 28 treesize of output 27 [2020-12-23 06:44:19,339 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:19,349 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:19,350 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:19,350 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2020-12-23 06:44:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:19,498 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:19,499 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 06:44:19,500 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:19,511 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:19,513 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 06:44:19,514 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:17 [2020-12-23 06:44:19,687 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:19,688 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:19,689 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:19,690 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:19,690 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:44:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 06:44:19,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:19,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2020-12-23 06:44:19,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123756631] [2020-12-23 06:44:19,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:44:19,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:19,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:44:19,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:44:19,746 INFO L87 Difference]: Start difference. First operand 362 states and 438 transitions. Second operand 28 states. [2020-12-23 06:44:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:21,491 INFO L93 Difference]: Finished difference Result 568 states and 700 transitions. [2020-12-23 06:44:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:44:21,492 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-12-23 06:44:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:21,494 INFO L225 Difference]: With dead ends: 568 [2020-12-23 06:44:21,494 INFO L226 Difference]: Without dead ends: 471 [2020-12-23 06:44:21,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=305, Invalid=1675, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:44:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-12-23 06:44:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 413. [2020-12-23 06:44:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-12-23 06:44:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 498 transitions. [2020-12-23 06:44:21,571 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 498 transitions. Word has length 51 [2020-12-23 06:44:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:21,571 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 498 transitions. [2020-12-23 06:44:21,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:44:21,572 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 498 transitions. [2020-12-23 06:44:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:44:21,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:21,573 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:21,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:44:21,786 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:21,787 INFO L82 PathProgramCache]: Analyzing trace with hash -663049668, now seen corresponding path program 3 times [2020-12-23 06:44:21,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:21,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878888993] [2020-12-23 06:44:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:44:22,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878888993] [2020-12-23 06:44:22,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706884382] [2020-12-23 06:44:22,453 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 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 06:44:22,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 06:44:22,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:44:22,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:44:22,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:22,842 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 06:44:22,843 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:22,851 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:22,853 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:22,853 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2020-12-23 06:44:22,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:23,072 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 28 treesize of output 27 [2020-12-23 06:44:23,073 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:23,084 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:23,085 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:23,085 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2020-12-23 06:44:23,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:23,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:23,275 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:23,275 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2020-12-23 06:44:23,277 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:23,299 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:23,301 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:23,302 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:28 [2020-12-23 06:44:23,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:23,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:23,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:23,496 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:23,497 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2020-12-23 06:44:23,498 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:23,506 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:23,507 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:23,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2020-12-23 06:44:23,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:23,777 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:23,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:44:23,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:23,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-23 06:44:23,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103510796] [2020-12-23 06:44:23,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:44:23,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:23,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:44:23,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:44:23,840 INFO L87 Difference]: Start difference. First operand 413 states and 498 transitions. Second operand 40 states. [2020-12-23 06:44:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:25,987 INFO L93 Difference]: Finished difference Result 656 states and 802 transitions. [2020-12-23 06:44:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:44:25,988 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 52 [2020-12-23 06:44:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:25,990 INFO L225 Difference]: With dead ends: 656 [2020-12-23 06:44:25,990 INFO L226 Difference]: Without dead ends: 578 [2020-12-23 06:44:25,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=387, Invalid=3153, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:44:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-12-23 06:44:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 439. [2020-12-23 06:44:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-12-23 06:44:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 533 transitions. [2020-12-23 06:44:26,069 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 533 transitions. Word has length 52 [2020-12-23 06:44:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:26,069 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 533 transitions. [2020-12-23 06:44:26,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:44:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 533 transitions. [2020-12-23 06:44:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:44:26,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:26,071 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:26,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:44:26,277 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:26,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:26,278 INFO L82 PathProgramCache]: Analyzing trace with hash -169981182, now seen corresponding path program 4 times [2020-12-23 06:44:26,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:26,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559669103] [2020-12-23 06:44:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:44:26,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559669103] [2020-12-23 06:44:26,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609710547] [2020-12-23 06:44:26,669 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 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 06:44:26,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:44:26,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:44:26,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:44:26,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:26,855 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 16 treesize of output 12 [2020-12-23 06:44:26,856 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:26,864 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:26,865 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 06:44:26,866 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:7 [2020-12-23 06:44:26,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:27,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:27,116 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 29 treesize of output 28 [2020-12-23 06:44:27,117 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:27,128 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:27,131 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:27,131 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2020-12-23 06:44:27,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:27,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:27,295 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:27,295 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2020-12-23 06:44:27,297 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:27,307 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:27,309 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 06:44:27,309 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:19 [2020-12-23 06:44:27,475 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:27,477 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:27,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 06:44:27,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:27,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2020-12-23 06:44:27,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300518126] [2020-12-23 06:44:27,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:44:27,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:27,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:44:27,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:44:27,526 INFO L87 Difference]: Start difference. First operand 439 states and 533 transitions. Second operand 34 states. [2020-12-23 06:44:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:29,765 INFO L93 Difference]: Finished difference Result 663 states and 814 transitions. [2020-12-23 06:44:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:44:29,766 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-12-23 06:44:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:29,768 INFO L225 Difference]: With dead ends: 663 [2020-12-23 06:44:29,768 INFO L226 Difference]: Without dead ends: 661 [2020-12-23 06:44:29,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=499, Invalid=3161, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:44:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-12-23 06:44:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 511. [2020-12-23 06:44:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-12-23 06:44:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 631 transitions. [2020-12-23 06:44:29,855 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 631 transitions. Word has length 52 [2020-12-23 06:44:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:29,855 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 631 transitions. [2020-12-23 06:44:29,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:44:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 631 transitions. [2020-12-23 06:44:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 06:44:29,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:29,857 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:30,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:44:30,073 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1569114548, now seen corresponding path program 2 times [2020-12-23 06:44:30,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:30,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057341096] [2020-12-23 06:44:30,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:44:30,113 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:44:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:44:30,162 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:44:30,187 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:44:30,187 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:44:30,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-23 06:44:30,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:44:30 BoogieIcfgContainer [2020-12-23 06:44:30,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:44:30,243 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:44:30,244 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:44:30,244 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:44:30,244 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:42:58" (3/4) ... [2020-12-23 06:44:30,246 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 06:44:30,305 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/insertion_sort-1.c-witness.graphml [2020-12-23 06:44:30,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:44:30,307 INFO L168 Benchmark]: Toolchain (without parser) took 92978.28 ms. Allocated memory was 158.3 MB in the beginning and 367.0 MB in the end (delta: 208.7 MB). Free memory was 133.0 MB in the beginning and 325.2 MB in the end (delta: -192.2 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:44:30,307 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 129.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:44:30,307 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.62 ms. Allocated memory is still 158.3 MB. Free memory was 132.8 MB in the beginning and 122.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:44:30,308 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.17 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 121.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:44:30,308 INFO L168 Benchmark]: Boogie Preprocessor took 67.45 ms. Allocated memory is still 158.3 MB. Free memory was 121.2 MB in the beginning and 120.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:44:30,308 INFO L168 Benchmark]: RCFGBuilder took 506.55 ms. Allocated memory is still 158.3 MB. Free memory was 120.0 MB in the beginning and 139.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:44:30,309 INFO L168 Benchmark]: TraceAbstraction took 91960.67 ms. Allocated memory was 158.3 MB in the beginning and 367.0 MB in the end (delta: 208.7 MB). Free memory was 138.7 MB in the beginning and 329.3 MB in the end (delta: -190.7 MB). Peak memory consumption was 221.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:44:30,309 INFO L168 Benchmark]: Witness Printer took 62.13 ms. Allocated memory is still 367.0 MB. Free memory was 329.3 MB in the beginning and 325.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-23 06:44:30,311 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 129.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.62 ms. Allocated memory is still 158.3 MB. Free memory was 132.8 MB in the beginning and 122.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 72.17 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 121.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.45 ms. Allocated memory is still 158.3 MB. Free memory was 121.2 MB in the beginning and 120.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 506.55 ms. Allocated memory is still 158.3 MB. Free memory was 120.0 MB in the beginning and 139.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 91960.67 ms. Allocated memory was 158.3 MB in the beginning and 367.0 MB in the end (delta: 208.7 MB). Free memory was 138.7 MB in the beginning and 329.3 MB in the end (delta: -190.7 MB). Peak memory consumption was 221.4 MB. Max. memory is 8.0 GB. * Witness Printer took 62.13 ms. Allocated memory is still 367.0 MB. Free memory was 329.3 MB in the beginning and 325.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j