/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/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:39:07,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:39:07,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:39:07,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:39:07,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:39:07,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:39:07,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:39:07,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:39:07,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:39:07,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:39:07,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:39:07,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:39:07,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:39:07,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:39:07,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:39:07,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:39:07,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:39:07,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:39:07,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:39:07,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:39:07,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:39:07,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:39:07,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:39:07,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:39:07,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:39:07,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:39:07,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:39:07,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:39:07,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:39:07,917 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:39:07,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:39:07,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:39:07,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:39:07,921 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:39:07,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:39:07,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:39:07,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:39:07,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:39:07,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:39:07,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:39:07,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:39:07,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:39:07,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:39:07,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:39:07,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:39:07,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:39:07,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:39:07,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:39:07,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:39:07,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:39:07,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:39:07,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:39:07,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:39:07,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:39:07,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:39:08,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:39:08,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:39:08,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:39:08,412 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:39:08,412 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:39:08,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/linear_sea.ch.c [2021-01-06 16:39:08,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a95e77f4/b20042a969a44360bc43c963539d0c10/FLAG87643a125 [2021-01-06 16:39:09,080 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:39:09,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/linear_sea.ch.c [2021-01-06 16:39:09,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a95e77f4/b20042a969a44360bc43c963539d0c10/FLAG87643a125 [2021-01-06 16:39:09,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a95e77f4/b20042a969a44360bc43c963539d0c10 [2021-01-06 16:39:09,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:39:09,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:39:09,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:39:09,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:39:09,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:39:09,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c859981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09, skipping insertion in model container [2021-01-06 16:39:09,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:39:09,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:39:09,702 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/linear_sea.ch.c[358,371] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMOD,IfThenElseExpression[BinaryExpression[LOGICAND,BinaryExpression[COMPLT,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[0]],BinaryExpression[COMPNEQ,IntegerLiteral[0],BinaryExpression[ARITHMOD,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]]],BinaryExpression[ARITHPLUS,IntegerLiteral[1],BinaryExpression[ARITHDIV,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]],BinaryExpression[ARITHDIV,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]],IntegerLiteral[4294967296]]]]]] [2021-01-06 16:39:09,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:39:09,748 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:39:09,765 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/linear_sea.ch.c[358,371] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMOD,IfThenElseExpression[BinaryExpression[LOGICAND,BinaryExpression[COMPLT,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[0]],BinaryExpression[COMPNEQ,IntegerLiteral[0],BinaryExpression[ARITHMOD,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]]],BinaryExpression[ARITHPLUS,IntegerLiteral[1],BinaryExpression[ARITHDIV,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]],BinaryExpression[ARITHDIV,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]],IntegerLiteral[4294967296]]]]]] [2021-01-06 16:39:09,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:39:09,813 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:39:09,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09 WrapperNode [2021-01-06 16:39:09,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:39:09,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:39:09,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:39:09,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:39:09,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:39:09,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:39:09,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:39:09,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:39:09,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (1/1) ... [2021-01-06 16:39:09,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:39:09,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:39:09,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:39:09,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:39:09,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:39:10,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:39:10,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:39:10,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:39:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 16:39:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:39:10,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:39:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:39:10,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:39:10,397 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 16:39:10,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:39:10 BoogieIcfgContainer [2021-01-06 16:39:10,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:39:10,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:39:10,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:39:10,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:39:10,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:39:09" (1/3) ... [2021-01-06 16:39:10,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f70749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:39:10, skipping insertion in model container [2021-01-06 16:39:10,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:39:09" (2/3) ... [2021-01-06 16:39:10,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f70749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:39:10, skipping insertion in model container [2021-01-06 16:39:10,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:39:10" (3/3) ... [2021-01-06 16:39:10,411 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2021-01-06 16:39:10,419 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:39:10,423 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:39:10,443 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:39:10,511 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:39:10,511 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:39:10,512 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:39:10,512 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:39:10,512 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:39:10,512 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:39:10,512 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:39:10,512 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:39:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2021-01-06 16:39:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:39:10,533 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:10,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:10,534 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash 132774875, now seen corresponding path program 1 times [2021-01-06 16:39:10,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:10,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244613536] [2021-01-06 16:39:10,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:39:10,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244613536] [2021-01-06 16:39:10,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:39:10,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:39:10,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165193991] [2021-01-06 16:39:10,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:39:10,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:10,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:39:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:39:10,806 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2021-01-06 16:39:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:10,822 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-01-06 16:39:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:39:10,823 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 16:39:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:10,832 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:39:10,832 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 16:39:10,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:39:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 16:39:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 16:39:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:39:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-01-06 16:39:10,866 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-01-06 16:39:10,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:10,867 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-01-06 16:39:10,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:39:10,867 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-01-06 16:39:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:39:10,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:10,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:10,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:39:10,868 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:10,870 INFO L82 PathProgramCache]: Analyzing trace with hash -317112588, now seen corresponding path program 1 times [2021-01-06 16:39:10,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:10,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364533835] [2021-01-06 16:39:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:39:10,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364533835] [2021-01-06 16:39:10,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:39:10,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:39:10,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524007584] [2021-01-06 16:39:10,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:39:10,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:10,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:39:10,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:39:10,976 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 4 states. [2021-01-06 16:39:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:11,021 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-01-06 16:39:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:39:11,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-01-06 16:39:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:11,022 INFO L225 Difference]: With dead ends: 15 [2021-01-06 16:39:11,022 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 16:39:11,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:39:11,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 16:39:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 16:39:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:39:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-01-06 16:39:11,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2021-01-06 16:39:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:11,027 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-01-06 16:39:11,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:39:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-01-06 16:39:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:39:11,028 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:11,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:11,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:39:11,029 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:11,030 INFO L82 PathProgramCache]: Analyzing trace with hash -317053006, now seen corresponding path program 1 times [2021-01-06 16:39:11,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:11,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904008242] [2021-01-06 16:39:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:39:11,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904008242] [2021-01-06 16:39:11,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:39:11,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:39:11,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609993343] [2021-01-06 16:39:11,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:39:11,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:39:11,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:39:11,294 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2021-01-06 16:39:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:11,330 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-01-06 16:39:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:39:11,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 16:39:11,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:11,334 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:39:11,334 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:39:11,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:39:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:39:11,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:39:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:39:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 16:39:11,343 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-01-06 16:39:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:11,344 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 16:39:11,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:39:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 16:39:11,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:39:11,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:11,345 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:11,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:39:11,346 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:11,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:11,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1714420412, now seen corresponding path program 1 times [2021-01-06 16:39:11,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:11,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585667630] [2021-01-06 16:39:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:39:11,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585667630] [2021-01-06 16:39:11,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990774764] [2021-01-06 16:39:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:11,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:39:11,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:39:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:39:11,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:39:11,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-01-06 16:39:11,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514862302] [2021-01-06 16:39:11,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:39:11,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:39:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:39:11,825 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 10 states. [2021-01-06 16:39:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:12,348 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-01-06 16:39:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:39:12,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-01-06 16:39:12,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:12,350 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:39:12,350 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:39:12,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:39:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:39:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 16:39:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:39:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 16:39:12,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-01-06 16:39:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:12,362 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 16:39:12,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:39:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 16:39:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:39:12,363 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:12,363 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:12,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:12,579 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:12,581 INFO L82 PathProgramCache]: Analyzing trace with hash 488445872, now seen corresponding path program 1 times [2021-01-06 16:39:12,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:12,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029985639] [2021-01-06 16:39:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:13,448 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 84 [2021-01-06 16:39:13,887 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 83 [2021-01-06 16:39:14,270 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2021-01-06 16:39:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:39:14,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029985639] [2021-01-06 16:39:14,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017986220] [2021-01-06 16:39:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:14,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:39:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:39:14,732 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 21 treesize of output 17 [2021-01-06 16:39:14,734 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:14,745 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:39:14,747 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:39:14,748 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2021-01-06 16:39:15,051 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:39:15,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:15,096 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:39:15,096 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 53 [2021-01-06 16:39:15,106 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:15,108 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:15,142 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:39:15,143 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 68 [2021-01-06 16:39:15,150 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:39:15,152 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:15,155 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:39:15,156 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:15,159 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:15,229 INFO L625 ElimStorePlain]: treesize reduction 1, result has 98.5 percent of original size [2021-01-06 16:39:15,230 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 16:39:15,231 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:103, output treesize:65 [2021-01-06 16:39:15,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:39:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:39:15,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:39:15,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 16:39:15,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766548679] [2021-01-06 16:39:15,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:39:15,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:15,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:39:15,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:39:15,700 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2021-01-06 16:39:16,260 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 58 [2021-01-06 16:39:16,551 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 59 [2021-01-06 16:39:16,913 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 67 [2021-01-06 16:39:17,230 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 46 [2021-01-06 16:39:17,417 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-01-06 16:39:17,656 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2021-01-06 16:39:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:18,055 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-01-06 16:39:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:39:18,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2021-01-06 16:39:18,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:18,057 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:39:18,058 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:39:18,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:39:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:39:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-01-06 16:39:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:39:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 16:39:18,070 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-01-06 16:39:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:18,071 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 16:39:18,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:39:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 16:39:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:39:18,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:18,076 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:18,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:18,277 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:18,279 INFO L82 PathProgramCache]: Analyzing trace with hash 570181232, now seen corresponding path program 2 times [2021-01-06 16:39:18,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:18,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268909642] [2021-01-06 16:39:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:19,061 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 44 [2021-01-06 16:39:19,280 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 48 [2021-01-06 16:39:19,962 WARN L197 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 71 [2021-01-06 16:39:20,780 WARN L197 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 82 [2021-01-06 16:39:21,397 WARN L197 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 77 [2021-01-06 16:39:22,165 WARN L197 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 65 [2021-01-06 16:39:22,964 WARN L197 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 96 [2021-01-06 16:39:23,589 WARN L197 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 55 [2021-01-06 16:39:24,067 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 35 [2021-01-06 16:39:24,372 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 54 [2021-01-06 16:39:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:39:24,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268909642] [2021-01-06 16:39:24,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579589533] [2021-01-06 16:39:24,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:24,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:39:24,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:39:24,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:39:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:39:24,640 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 21 treesize of output 17 [2021-01-06 16:39:24,641 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:24,652 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:39:24,653 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:39:24,653 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2021-01-06 16:39:25,126 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:39:25,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:25,166 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:39:25,166 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 55 [2021-01-06 16:39:25,169 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:25,171 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:25,204 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:39:25,205 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 72 [2021-01-06 16:39:25,210 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:39:25,211 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:25,213 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:39:25,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:25,216 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:25,305 INFO L625 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-01-06 16:39:25,314 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 16:39:25,314 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:113, output treesize:71 [2021-01-06 16:39:25,738 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:39:25,939 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:39:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:39:26,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:39:26,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-01-06 16:39:26,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97451595] [2021-01-06 16:39:26,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:39:26,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:26,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:39:26,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:39:26,010 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 24 states. [2021-01-06 16:39:26,548 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-01-06 16:39:26,850 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2021-01-06 16:39:27,183 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2021-01-06 16:39:27,555 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 48 [2021-01-06 16:39:27,948 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 49 [2021-01-06 16:39:28,486 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 58 [2021-01-06 16:39:28,826 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 40 [2021-01-06 16:39:29,202 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 52 [2021-01-06 16:39:29,545 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2021-01-06 16:39:29,770 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 38 [2021-01-06 16:39:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:29,916 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-01-06 16:39:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:39:29,918 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2021-01-06 16:39:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:29,919 INFO L225 Difference]: With dead ends: 39 [2021-01-06 16:39:29,919 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:39:29,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:39:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:39:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-01-06 16:39:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:39:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-01-06 16:39:29,927 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2021-01-06 16:39:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:29,927 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-01-06 16:39:29,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:39:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-01-06 16:39:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:39:29,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:29,928 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:30,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:30,132 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1970775806, now seen corresponding path program 3 times [2021-01-06 16:39:30,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:30,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617251597] [2021-01-06 16:39:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:30,588 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 48 [2021-01-06 16:39:30,795 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 63 [2021-01-06 16:39:31,440 WARN L197 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 86 [2021-01-06 16:39:31,902 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 88 [2021-01-06 16:39:32,518 WARN L197 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 92 [2021-01-06 16:39:33,072 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 82 [2021-01-06 16:39:33,861 WARN L197 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-01-06 16:39:34,685 WARN L197 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 103 [2021-01-06 16:39:35,521 WARN L197 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 92 [2021-01-06 16:39:36,181 WARN L197 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-01-06 16:39:36,591 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2021-01-06 16:39:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:39:36,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617251597] [2021-01-06 16:39:36,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903061363] [2021-01-06 16:39:36,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:37,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:39:37,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:39:37,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:39:37,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:39:37,370 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 21 treesize of output 17 [2021-01-06 16:39:37,371 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:37,379 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 21 treesize of output 17 [2021-01-06 16:39:37,380 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:37,471 INFO L625 ElimStorePlain]: treesize reduction 5, result has 93.8 percent of original size [2021-01-06 16:39:37,473 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 16:39:37,474 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:89, output treesize:76 [2021-01-06 16:39:38,792 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-01-06 16:39:39,183 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 16:39:39,975 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-01-06 16:39:39,985 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 5, 1] term [2021-01-06 16:39:39,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:39:39,988 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:39:40,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:40,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:40,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:40,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:40,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:40,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:40,044 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 15 [2021-01-06 16:39:40,050 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:40,178 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-01-06 16:39:40,179 INFO L348 Elim1Store]: treesize reduction 68, result has 53.1 percent of original size [2021-01-06 16:39:40,179 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 92 [2021-01-06 16:39:40,184 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:40,193 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:40,195 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:40,197 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:40,471 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-01-06 16:39:40,472 INFO L625 ElimStorePlain]: treesize reduction 89, result has 68.2 percent of original size [2021-01-06 16:39:40,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:39:40,562 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:39:40,563 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 92 [2021-01-06 16:39:40,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:40,570 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:40,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:40,577 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:40,721 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-01-06 16:39:40,722 INFO L348 Elim1Store]: treesize reduction 68, result has 53.1 percent of original size [2021-01-06 16:39:40,722 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 91 [2021-01-06 16:39:40,725 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:40,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:40,728 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-01-06 16:39:40,965 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-01-06 16:39:40,966 INFO L625 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2021-01-06 16:39:40,967 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-01-06 16:39:40,967 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:353, output treesize:153 [2021-01-06 16:39:41,284 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-01-06 16:39:41,594 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 7, 1] term [2021-01-06 16:39:41,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:39:42,141 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-01-06 16:39:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:39:42,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:39:42,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-01-06 16:39:42,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034753167] [2021-01-06 16:39:42,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:39:42,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:42,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:39:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:39:42,155 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 28 states. [2021-01-06 16:39:42,950 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 41 [2021-01-06 16:39:43,220 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 42 [2021-01-06 16:39:43,697 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 41 [2021-01-06 16:39:44,377 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 73 [2021-01-06 16:39:44,838 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 47 [2021-01-06 16:39:45,595 WARN L197 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 56 [2021-01-06 16:39:46,282 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 59 [2021-01-06 16:39:47,812 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 205 DAG size of output: 77 [2021-01-06 16:39:49,670 WARN L197 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 205 DAG size of output: 78 [2021-01-06 16:39:52,391 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 220 DAG size of output: 86 [2021-01-06 16:39:55,704 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 200 DAG size of output: 64 [2021-01-06 16:39:57,805 WARN L197 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 201 DAG size of output: 65 [2021-01-06 16:40:00,301 WARN L197 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 166 DAG size of output: 61 [2021-01-06 16:40:03,058 WARN L197 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 166 DAG size of output: 62 [2021-01-06 16:40:04,093 WARN L197 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2021-01-06 16:40:04,882 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 47 [2021-01-06 16:40:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:05,820 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-01-06 16:40:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:40:05,821 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 25 [2021-01-06 16:40:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:05,822 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:40:05,822 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 16:40:05,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=289, Invalid=1967, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:40:05,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 16:40:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-01-06 16:40:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:40:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-01-06 16:40:05,832 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 25 [2021-01-06 16:40:05,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:05,832 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-01-06 16:40:05,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:40:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-01-06 16:40:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:40:05,834 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:05,834 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:06,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:06,035 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:06,036 INFO L82 PathProgramCache]: Analyzing trace with hash 511130498, now seen corresponding path program 4 times [2021-01-06 16:40:06,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:06,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610851124] [2021-01-06 16:40:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:06,765 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2021-01-06 16:40:06,994 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 70 [2021-01-06 16:40:07,456 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2021-01-06 16:40:07,836 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 75 [2021-01-06 16:40:08,203 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2021-01-06 16:40:08,683 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 86 [2021-01-06 16:40:09,377 WARN L197 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 78 [2021-01-06 16:40:09,813 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 67 [2021-01-06 16:40:10,249 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2021-01-06 16:40:10,682 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2021-01-06 16:40:11,125 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 67 [2021-01-06 16:40:11,686 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 68 [2021-01-06 16:40:12,448 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 61 [2021-01-06 16:40:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:12,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610851124] [2021-01-06 16:40:12,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463977887] [2021-01-06 16:40:12,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:13,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:40:13,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:13,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:40:13,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:13,337 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 21 treesize of output 17 [2021-01-06 16:40:13,338 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:13,348 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 21 treesize of output 17 [2021-01-06 16:40:13,349 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:13,454 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-01-06 16:40:13,455 INFO L625 ElimStorePlain]: treesize reduction 5, result has 93.8 percent of original size [2021-01-06 16:40:13,457 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 16:40:13,457 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:89, output treesize:76 [2021-01-06 16:40:14,399 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2021-01-06 16:40:14,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:40:14,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:40:14,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:14,421 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 7 [2021-01-06 16:40:14,425 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:14,440 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:14,441 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-01-06 16:40:14,443 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:40:14,445 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:14,635 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-01-06 16:40:14,636 INFO L625 ElimStorePlain]: treesize reduction 35, result has 77.3 percent of original size [2021-01-06 16:40:14,658 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:14,659 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-01-06 16:40:14,664 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:40:14,666 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:14,681 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:14,681 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-01-06 16:40:14,683 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:14,808 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-01-06 16:40:14,809 INFO L625 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-01-06 16:40:14,810 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-01-06 16:40:14,810 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:199, output treesize:73 [2021-01-06 16:40:16,006 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2021-01-06 16:40:16,006 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:40:16,394 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-01-06 16:40:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:16,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:16,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 33 [2021-01-06 16:40:16,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483507107] [2021-01-06 16:40:16,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:40:16,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:16,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:40:16,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:40:16,799 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 33 states. [2021-01-06 16:40:17,188 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 39 [2021-01-06 16:40:17,825 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2021-01-06 16:40:18,309 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 39 [2021-01-06 16:40:18,710 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 39 [2021-01-06 16:40:19,170 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 51 [2021-01-06 16:40:19,866 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 61 [2021-01-06 16:40:20,360 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2021-01-06 16:40:20,975 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2021-01-06 16:40:21,632 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2021-01-06 16:40:22,290 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 37 [2021-01-06 16:40:22,831 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 45 [2021-01-06 16:40:23,484 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 55 [2021-01-06 16:40:23,869 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-01-06 16:40:24,467 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2021-01-06 16:40:25,431 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2021-01-06 16:40:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:25,534 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-01-06 16:40:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:40:25,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2021-01-06 16:40:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:25,538 INFO L225 Difference]: With dead ends: 53 [2021-01-06 16:40:25,538 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 16:40:25,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:40:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 16:40:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-01-06 16:40:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:40:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-01-06 16:40:25,553 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2021-01-06 16:40:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:25,553 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-01-06 16:40:25,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:40:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-01-06 16:40:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:40:25,555 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:25,555 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:25,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:25,757 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash -214601040, now seen corresponding path program 5 times [2021-01-06 16:40:25,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:25,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472349611] [2021-01-06 16:40:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:26,400 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 54 [2021-01-06 16:40:26,698 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-01-06 16:40:26,964 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 61 [2021-01-06 16:40:27,206 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 58 [2021-01-06 16:40:27,460 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2021-01-06 16:40:27,698 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 60 [2021-01-06 16:40:27,945 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 60 [2021-01-06 16:40:28,425 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2021-01-06 16:40:28,978 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 85 [2021-01-06 16:40:29,567 WARN L197 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 74 [2021-01-06 16:40:30,616 WARN L197 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 77 [2021-01-06 16:40:31,870 WARN L197 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 78 [2021-01-06 16:40:32,979 WARN L197 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2021-01-06 16:40:33,899 WARN L197 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2021-01-06 16:40:35,108 WARN L197 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2021-01-06 16:40:35,767 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 55 [2021-01-06 16:40:36,360 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2021-01-06 16:40:36,879 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2021-01-06 16:40:37,285 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2021-01-06 16:40:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:37,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472349611] [2021-01-06 16:40:37,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086103488] [2021-01-06 16:40:37,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:38,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 16:40:38,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:38,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:40:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:38,370 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 16:40:38,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-01-06 16:40:38,403 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:38,662 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-01-06 16:40:38,663 INFO L625 ElimStorePlain]: treesize reduction 31, result has 65.9 percent of original size [2021-01-06 16:40:38,675 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 21 treesize of output 17 [2021-01-06 16:40:38,677 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:38,740 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:38,741 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:38,741 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:161, output treesize:56 [2021-01-06 16:40:39,084 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-01-06 16:40:41,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:40:41,124 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:41,124 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-01-06 16:40:41,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:40:41,129 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:41,152 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:41,153 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-01-06 16:40:41,157 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:41,519 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-01-06 16:40:41,520 INFO L625 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-01-06 16:40:41,521 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 16:40:41,521 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:137, output treesize:91 [2021-01-06 16:40:42,072 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-01-06 16:40:42,555 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-01-06 16:40:44,732 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-01-06 16:40:45,454 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-01-06 16:40:46,092 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-01-06 16:40:46,151 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:40:46,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 17 disjuncts