/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-crafted/zero_sum_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:44:24,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:44:24,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:44:24,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:44:24,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:44:25,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:44:25,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:44:25,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:44:25,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:44:25,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:44:25,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:44:25,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:44:25,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:44:25,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:44:25,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:44:25,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:44:25,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:44:25,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:44:25,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:44:25,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:44:25,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:44:25,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:44:25,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:44:25,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:44:25,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:44:25,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:44:25,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:44:25,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:44:25,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:44:25,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:44:25,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:44:25,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:44:25,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:44:25,160 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:44:25,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:44:25,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:44:25,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:44:25,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:44:25,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:44:25,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:44:25,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:44:25,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:44:25,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:44:25,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:44:25,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:44:25,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:44:25,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:44:25,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:44:25,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:44:25,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:44:25,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:44:25,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:44:25,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:44:25,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:44:25,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:44:25,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:44:25,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:44:25,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:44:25,637 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:44:25,638 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:44:25,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m3.c [2021-01-06 10:44:25,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/15cbfb0d1/c6eff49c9c3d4a7ca6d8bf21e2776ce7/FLAG783e76b9c [2021-01-06 10:44:26,498 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:44:26,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m3.c [2021-01-06 10:44:26,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/15cbfb0d1/c6eff49c9c3d4a7ca6d8bf21e2776ce7/FLAG783e76b9c [2021-01-06 10:44:26,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/15cbfb0d1/c6eff49c9c3d4a7ca6d8bf21e2776ce7 [2021-01-06 10:44:26,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:44:26,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:44:26,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:44:26,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:44:26,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:44:26,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:44:26" (1/1) ... [2021-01-06 10:44:26,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1461f60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:26, skipping insertion in model container [2021-01-06 10:44:26,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:44:26" (1/1) ... [2021-01-06 10:44:26,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:44:26,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:44:27,019 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m3.c[402,415] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2021-01-06 10:44:27,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:44:27,053 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:44:27,068 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m3.c[402,415] 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[2],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2021-01-06 10:44:27,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:44:27,098 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:44:27,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27 WrapperNode [2021-01-06 10:44:27,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:44:27,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:44:27,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:44:27,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:44:27,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (1/1) ... [2021-01-06 10:44:27,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (1/1) ... [2021-01-06 10:44:27,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:44:27,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:44:27,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:44:27,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:44:27,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (1/1) ... [2021-01-06 10:44:27,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (1/1) ... [2021-01-06 10:44:27,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (1/1) ... [2021-01-06 10:44:27,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (1/1) ... [2021-01-06 10:44:27,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (1/1) ... [2021-01-06 10:44:27,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (1/1) ... [2021-01-06 10:44:27,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (1/1) ... [2021-01-06 10:44:27,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:44:27,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:44:27,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:44:27,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:44:27,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:44:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:44:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:44:27,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:44:27,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:44:27,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:44:27,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:44:27,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:44:27,776 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:44:27,776 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 10:44:27,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:44:27 BoogieIcfgContainer [2021-01-06 10:44:27,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:44:27,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:44:27,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:44:27,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:44:27,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:44:26" (1/3) ... [2021-01-06 10:44:27,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e70a8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:44:27, skipping insertion in model container [2021-01-06 10:44:27,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:44:27" (2/3) ... [2021-01-06 10:44:27,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e70a8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:44:27, skipping insertion in model container [2021-01-06 10:44:27,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:44:27" (3/3) ... [2021-01-06 10:44:27,787 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m3.c [2021-01-06 10:44:27,796 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:44:27,801 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:44:27,824 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:44:27,856 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:44:27,856 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:44:27,856 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:44:27,856 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:44:27,857 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:44:27,857 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:44:27,857 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:44:27,857 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:44:27,874 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-01-06 10:44:27,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:44:27,881 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:27,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:27,882 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:27,890 INFO L82 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2021-01-06 10:44:27,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:27,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023846968] [2021-01-06 10:44:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:44:28,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023846968] [2021-01-06 10:44:28,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:44:28,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:44:28,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056366114] [2021-01-06 10:44:28,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:44:28,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:28,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:44:28,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:44:28,126 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-01-06 10:44:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:28,154 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2021-01-06 10:44:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:44:28,156 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2021-01-06 10:44:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:28,177 INFO L225 Difference]: With dead ends: 59 [2021-01-06 10:44:28,181 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:44:28,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:44:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:44:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 10:44:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:44:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-01-06 10:44:28,237 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-01-06 10:44:28,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:28,238 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-01-06 10:44:28,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:44:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-01-06 10:44:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:44:28,241 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:28,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:28,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:44:28,242 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:28,246 INFO L82 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2021-01-06 10:44:28,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:28,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133422609] [2021-01-06 10:44:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:44:28,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133422609] [2021-01-06 10:44:28,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:44:28,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:44:28,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472009477] [2021-01-06 10:44:28,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:44:28,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:28,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:44:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:44:28,394 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2021-01-06 10:44:28,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:28,476 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-01-06 10:44:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:44:28,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:44:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:28,478 INFO L225 Difference]: With dead ends: 51 [2021-01-06 10:44:28,478 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:44:28,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:44:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:44:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-01-06 10:44:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:44:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-01-06 10:44:28,486 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2021-01-06 10:44:28,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:28,487 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-01-06 10:44:28,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:44:28,487 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-01-06 10:44:28,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:44:28,488 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:28,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:28,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:44:28,489 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:28,490 INFO L82 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2021-01-06 10:44:28,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:28,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746219631] [2021-01-06 10:44:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:44:28,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746219631] [2021-01-06 10:44:28,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:44:28,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:44:28,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62417575] [2021-01-06 10:44:28,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:44:28,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:28,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:44:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:44:28,599 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2021-01-06 10:44:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:28,758 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-01-06 10:44:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:44:28,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-01-06 10:44:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:28,760 INFO L225 Difference]: With dead ends: 59 [2021-01-06 10:44:28,760 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 10:44:28,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:44:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 10:44:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-01-06 10:44:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:44:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-01-06 10:44:28,771 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2021-01-06 10:44:28,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:28,772 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-01-06 10:44:28,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:44:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-01-06 10:44:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:44:28,773 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:28,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:28,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 10:44:28,774 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:28,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:28,774 INFO L82 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2021-01-06 10:44:28,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:28,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571403724] [2021-01-06 10:44:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 10:44:28,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571403724] [2021-01-06 10:44:28,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877450799] [2021-01-06 10:44:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:29,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:44:29,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:44:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 10:44:29,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:44:29,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:44:29,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385821121] [2021-01-06 10:44:29,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:44:29,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:29,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:44:29,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:44:29,175 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2021-01-06 10:44:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:29,266 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-01-06 10:44:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:44:29,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2021-01-06 10:44:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:29,268 INFO L225 Difference]: With dead ends: 65 [2021-01-06 10:44:29,268 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 10:44:29,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:44:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 10:44:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 10:44:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:44:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-01-06 10:44:29,276 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2021-01-06 10:44:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:29,277 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-01-06 10:44:29,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:44:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-01-06 10:44:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:44:29,279 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:29,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:29,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:29,503 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:29,504 INFO L82 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2021-01-06 10:44:29,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:29,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045375178] [2021-01-06 10:44:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:44:29,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045375178] [2021-01-06 10:44:29,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548576130] [2021-01-06 10:44:29,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:29,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:44:29,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:44:29,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:44:29,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:44:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:44:29,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:44:29,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-01-06 10:44:29,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708528514] [2021-01-06 10:44:29,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:44:29,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:44:29,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:44:29,863 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2021-01-06 10:44:30,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:30,148 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-01-06 10:44:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:44:30,149 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 10:44:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:30,150 INFO L225 Difference]: With dead ends: 78 [2021-01-06 10:44:30,150 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 10:44:30,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:44:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 10:44:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-01-06 10:44:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:44:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-01-06 10:44:30,169 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2021-01-06 10:44:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:30,170 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-01-06 10:44:30,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:44:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-01-06 10:44:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:44:30,173 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:30,174 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:30,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:30,388 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:30,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:30,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2021-01-06 10:44:30,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:30,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498383846] [2021-01-06 10:44:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:44:32,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498383846] [2021-01-06 10:44:32,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317207784] [2021-01-06 10:44:32,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:33,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:44:33,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:44:33,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 10:44:33,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:44:34,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:44:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:44:34,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:44:34,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 33 [2021-01-06 10:44:34,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713815082] [2021-01-06 10:44:34,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:44:34,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:34,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:44:34,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:44:34,076 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 33 states. [2021-01-06 10:44:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:35,304 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-01-06 10:44:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:44:35,305 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 47 [2021-01-06 10:44:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:35,306 INFO L225 Difference]: With dead ends: 89 [2021-01-06 10:44:35,307 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 10:44:35,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 24 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:44:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 10:44:35,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2021-01-06 10:44:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 10:44:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-01-06 10:44:35,319 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2021-01-06 10:44:35,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:35,319 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-01-06 10:44:35,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:44:35,319 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-01-06 10:44:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:44:35,321 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:35,321 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:35,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:35,536 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2021-01-06 10:44:35,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:35,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268970789] [2021-01-06 10:44:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 10:44:35,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268970789] [2021-01-06 10:44:35,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357991605] [2021-01-06 10:44:35,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:35,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:44:35,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:44:35,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:44:35,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:44:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 10:44:35,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:44:35,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 10:44:35,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078877563] [2021-01-06 10:44:35,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:44:35,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:35,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:44:35,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:44:35,805 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 13 states. [2021-01-06 10:44:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:36,075 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2021-01-06 10:44:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:44:36,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2021-01-06 10:44:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:36,077 INFO L225 Difference]: With dead ends: 152 [2021-01-06 10:44:36,077 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 10:44:36,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:44:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 10:44:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-01-06 10:44:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 10:44:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-01-06 10:44:36,088 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 49 [2021-01-06 10:44:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:36,089 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-01-06 10:44:36,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:44:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-01-06 10:44:36,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:44:36,090 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:36,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:36,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:36,306 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash -436136292, now seen corresponding path program 5 times [2021-01-06 10:44:36,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:36,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281043431] [2021-01-06 10:44:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 10:44:36,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281043431] [2021-01-06 10:44:36,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68653720] [2021-01-06 10:44:36,422 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:36,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 10:44:36,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:44:36,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:44:36,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:44:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 10:44:36,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:44:36,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 10:44:36,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074253313] [2021-01-06 10:44:36,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:44:36,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:44:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:44:36,734 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 16 states. [2021-01-06 10:44:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:37,114 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2021-01-06 10:44:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:44:37,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2021-01-06 10:44:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:37,115 INFO L225 Difference]: With dead ends: 125 [2021-01-06 10:44:37,115 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 10:44:37,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:44:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 10:44:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-01-06 10:44:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 10:44:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-01-06 10:44:37,124 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2021-01-06 10:44:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:37,124 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-01-06 10:44:37,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:44:37,125 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-01-06 10:44:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:44:37,126 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:37,126 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:37,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:37,341 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2021-01-06 10:44:37,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:37,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143570100] [2021-01-06 10:44:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:44:41,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143570100] [2021-01-06 10:44:41,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757576483] [2021-01-06 10:44:41,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:41,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 10:44:41,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:44:41,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 94 conjunts are in the unsatisfiable core [2021-01-06 10:44:41,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:44:50,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:44:50,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:44:50,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:44:50,028 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:44:50,029 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 6 case distinctions, treesize of input 32 treesize of output 43 [2021-01-06 10:44:50,032 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:44:50,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:44:50,037 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:44:50,037 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:44:50,041 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-01-06 10:44:50,072 INFO L625 ElimStorePlain]: treesize reduction 6, result has 81.8 percent of original size [2021-01-06 10:44:50,074 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:44:50,076 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:44:50,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:31 [2021-01-06 10:44:50,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:44:50,445 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:44:50,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:44:50,521 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:44:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:44:50,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:44:50,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 92 [2021-01-06 10:44:50,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818296814] [2021-01-06 10:44:50,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-01-06 10:44:50,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:50,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-01-06 10:44:50,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=7774, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 10:44:50,703 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 92 states. [2021-01-06 10:44:52,250 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-01-06 10:44:52,605 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-01-06 10:44:52,976 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2021-01-06 10:44:53,645 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2021-01-06 10:44:54,842 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-01-06 10:44:55,153 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-01-06 10:44:55,492 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2021-01-06 10:44:55,879 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-01-06 10:44:56,263 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-01-06 10:44:58,287 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-01-06 10:45:00,936 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-01-06 10:45:02,436 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2021-01-06 10:45:04,460 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-01-06 10:45:04,778 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-01-06 10:45:05,711 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-01-06 10:45:06,599 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-01-06 10:45:06,981 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-01-06 10:45:07,613 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-01-06 10:45:08,705 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-01-06 10:45:12,582 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-01-06 10:45:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:14,121 INFO L93 Difference]: Finished difference Result 235 states and 259 transitions. [2021-01-06 10:45:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 10:45:14,121 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 61 [2021-01-06 10:45:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:14,123 INFO L225 Difference]: With dead ends: 235 [2021-01-06 10:45:14,123 INFO L226 Difference]: Without dead ends: 231 [2021-01-06 10:45:14,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5297 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=1199, Invalid=16093, Unknown=0, NotChecked=0, Total=17292 [2021-01-06 10:45:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-01-06 10:45:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 109. [2021-01-06 10:45:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 10:45:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-01-06 10:45:14,174 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 61 [2021-01-06 10:45:14,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:14,174 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-01-06 10:45:14,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2021-01-06 10:45:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-01-06 10:45:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:45:14,176 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:14,176 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:45:14,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:14,392 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:14,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2021-01-06 10:45:14,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:14,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405370866] [2021-01-06 10:45:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:45:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:45:14,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405370866] [2021-01-06 10:45:14,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627739927] [2021-01-06 10:45:14,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:45:14,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:45:14,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:45:14,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:45:14,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 10:45:14,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143023793] [2021-01-06 10:45:14,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:45:14,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:14,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:45:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:45:14,798 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand 16 states. [2021-01-06 10:45:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:15,302 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2021-01-06 10:45:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:45:15,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2021-01-06 10:45:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:15,304 INFO L225 Difference]: With dead ends: 225 [2021-01-06 10:45:15,304 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 10:45:15,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:45:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 10:45:15,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-01-06 10:45:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 10:45:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2021-01-06 10:45:15,325 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 63 [2021-01-06 10:45:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:15,325 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2021-01-06 10:45:15,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:45:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2021-01-06 10:45:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:45:15,326 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:15,327 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:45:15,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:45:15,542 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:15,544 INFO L82 PathProgramCache]: Analyzing trace with hash -784405174, now seen corresponding path program 8 times [2021-01-06 10:45:15,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:15,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477476357] [2021-01-06 10:45:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:45:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 10:45:15,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477476357] [2021-01-06 10:45:15,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074395679] [2021-01-06 10:45:15,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:15,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:45:15,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:45:15,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:45:15,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 10:45:15,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:45:15,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 10:45:15,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310908428] [2021-01-06 10:45:15,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:45:15,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:45:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:45:15,927 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 16 states. [2021-01-06 10:45:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:16,434 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2021-01-06 10:45:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:45:16,435 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2021-01-06 10:45:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:16,436 INFO L225 Difference]: With dead ends: 155 [2021-01-06 10:45:16,436 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 10:45:16,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:45:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 10:45:16,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-01-06 10:45:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:45:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-01-06 10:45:16,454 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2021-01-06 10:45:16,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:16,455 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-01-06 10:45:16,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:45:16,455 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-01-06 10:45:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:45:16,456 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:16,456 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:45:16,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:45:16,664 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:16,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:16,665 INFO L82 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2021-01-06 10:45:16,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:16,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001970629] [2021-01-06 10:45:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:45:17,857 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-01-06 10:45:18,192 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-01-06 10:45:19,078 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-01-06 10:45:19,285 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-01-06 10:45:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:45:25,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001970629] [2021-01-06 10:45:25,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874089525] [2021-01-06 10:45:25,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:25,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:45:25,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:45:25,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 118 conjunts are in the unsatisfiable core [2021-01-06 10:45:25,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:25,449 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 10:45:25,450 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:45:25,462 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:45:25,464 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:45:25,464 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-01-06 10:45:45,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:45:45,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:45:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:45:45,180 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:45:45,181 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 6 case distinctions, treesize of input 36 treesize of output 51 [2021-01-06 10:45:45,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:45:45,189 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:45:45,190 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:45:45,190 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:45:45,190 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:45:45,191 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:45:45,195 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-01-06 10:45:45,219 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:45:45,221 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:45:45,224 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:45:45,225 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:18 [2021-01-06 10:45:45,625 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:45:46,158 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:45:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:45:46,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:45:46,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 56] total 115 [2021-01-06 10:45:46,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860991968] [2021-01-06 10:45:46,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-01-06 10:45:46,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:46,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-01-06 10:45:46,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=12652, Unknown=0, NotChecked=0, Total=13110 [2021-01-06 10:45:46,540 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 115 states. [2021-01-06 10:45:52,702 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-01-06 10:45:54,207 WARN L197 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 70 [2021-01-06 10:45:57,374 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-01-06 10:45:57,964 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-01-06 10:45:59,280 WARN L197 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 84 [2021-01-06 10:46:00,340 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-01-06 10:46:00,829 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-01-06 10:46:02,211 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 72 [2021-01-06 10:46:03,846 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 82 [2021-01-06 10:46:05,428 WARN L197 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 59 [2021-01-06 10:46:06,434 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-01-06 10:46:07,364 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-01-06 10:46:08,911 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 82 [2021-01-06 10:46:11,484 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-01-06 10:46:16,254 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 77 [2021-01-06 10:46:17,509 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2021-01-06 10:46:18,044 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-01-06 10:46:18,998 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2021-01-06 10:46:20,260 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-01-06 10:46:24,286 WARN L197 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 96 [2021-01-06 10:46:30,497 WARN L197 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 92 [2021-01-06 10:46:37,088 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-01-06 10:46:38,204 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-01-06 10:46:39,924 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2021-01-06 10:46:43,419 WARN L197 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2021-01-06 10:46:45,829 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2021-01-06 10:46:48,215 WARN L197 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 101 [2021-01-06 10:46:50,506 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2021-01-06 10:46:51,286 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-01-06 10:46:54,033 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 94 [2021-01-06 10:46:56,987 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-01-06 10:47:00,367 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2021-01-06 10:47:05,445 WARN L197 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 93 [2021-01-06 10:47:08,133 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2021-01-06 10:47:09,097 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-01-06 10:47:10,156 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2021-01-06 10:47:12,773 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2021-01-06 10:47:13,638 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-01-06 10:47:16,796 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-01-06 10:47:20,433 WARN L197 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2021-01-06 10:47:22,555 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2021-01-06 10:47:24,394 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-01-06 10:47:26,790 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-01-06 10:47:27,532 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-01-06 10:47:29,904 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-01-06 10:47:32,486 WARN L197 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-01-06 10:47:34,807 WARN L197 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-01-06 10:47:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:35,614 INFO L93 Difference]: Finished difference Result 206 states and 225 transitions. [2021-01-06 10:47:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-01-06 10:47:35,617 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 75 [2021-01-06 10:47:35,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:35,620 INFO L225 Difference]: With dead ends: 206 [2021-01-06 10:47:35,620 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 10:47:35,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10435 ImplicationChecksByTransitivity, 112.0s TimeCoverageRelationStatistics Valid=1447, Invalid=42859, Unknown=4, NotChecked=0, Total=44310 [2021-01-06 10:47:35,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 10:47:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 133. [2021-01-06 10:47:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 10:47:35,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2021-01-06 10:47:35,659 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 75 [2021-01-06 10:47:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:35,659 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2021-01-06 10:47:35,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 115 states. [2021-01-06 10:47:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2021-01-06 10:47:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 10:47:35,660 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:35,660 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:35,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:35,875 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:35,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1706175702, now seen corresponding path program 10 times [2021-01-06 10:47:35,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:35,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416941900] [2021-01-06 10:47:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:47:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-01-06 10:47:36,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416941900] [2021-01-06 10:47:36,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314856092] [2021-01-06 10:47:36,203 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:36,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:47:36,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:36,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:47:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-01-06 10:47:36,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:47:36,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-01-06 10:47:36,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553937236] [2021-01-06 10:47:36,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:47:36,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:36,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:47:36,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:47:36,899 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand 19 states. [2021-01-06 10:47:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:38,520 INFO L93 Difference]: Finished difference Result 275 states and 301 transitions. [2021-01-06 10:47:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:47:38,523 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2021-01-06 10:47:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:38,525 INFO L225 Difference]: With dead ends: 275 [2021-01-06 10:47:38,525 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 10:47:38,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:47:38,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 10:47:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-01-06 10:47:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 10:47:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2021-01-06 10:47:38,549 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 77 [2021-01-06 10:47:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:38,550 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2021-01-06 10:47:38,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:47:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2021-01-06 10:47:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:47:38,550 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:38,551 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:38,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:38,752 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1014758264, now seen corresponding path program 11 times [2021-01-06 10:47:38,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:38,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442921250] [2021-01-06 10:47:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:47:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-01-06 10:47:39,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442921250] [2021-01-06 10:47:39,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689620123] [2021-01-06 10:47:39,123 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:39,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:47:39,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:39,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:47:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-01-06 10:47:40,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:47:40,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-01-06 10:47:40,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401455871] [2021-01-06 10:47:40,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:47:40,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:40,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:47:40,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:47:40,271 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 24 states. [2021-01-06 10:47:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:42,328 INFO L93 Difference]: Finished difference Result 185 states and 205 transitions. [2021-01-06 10:47:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:47:42,332 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2021-01-06 10:47:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:42,333 INFO L225 Difference]: With dead ends: 185 [2021-01-06 10:47:42,333 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 10:47:42,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:47:42,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 10:47:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-01-06 10:47:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:47:42,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-01-06 10:47:42,352 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2021-01-06 10:47:42,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:42,352 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-01-06 10:47:42,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:47:42,352 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-01-06 10:47:42,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:47:42,353 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:42,353 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:42,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:47:42,554 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:42,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1296238366, now seen corresponding path program 12 times [2021-01-06 10:47:42,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:42,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289486382] [2021-01-06 10:47:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:47:43,848 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-01-06 10:47:44,083 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-01-06 10:47:44,436 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 16 [2021-01-06 10:47:44,655 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-01-06 10:47:44,944 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-01-06 10:47:45,269 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-01-06 10:47:45,578 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-01-06 10:47:45,898 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-01-06 10:47:46,240 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-01-06 10:47:46,590 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-01-06 10:47:46,887 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 10:47:47,134 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-01-06 10:47:47,425 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-01-06 10:47:47,723 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-01-06 10:47:48,060 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-01-06 10:47:48,410 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-01-06 10:47:48,804 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-01-06 10:47:49,276 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-01-06 10:47:49,675 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-01-06 10:47:50,085 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-01-06 10:47:50,474 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-01-06 10:47:50,849 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-01-06 10:47:51,265 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-01-06 10:47:51,573 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-01-06 10:47:51,879 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-01-06 10:47:52,198 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-01-06 10:47:52,550 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-01-06 10:47:52,913 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-01-06 10:47:53,297 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-01-06 10:47:53,696 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-01-06 10:47:54,117 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-01-06 10:47:54,564 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-01-06 10:47:54,881 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-01-06 10:47:55,203 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-01-06 10:47:55,527 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-01-06 10:47:56,758 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-01-06 10:47:57,235 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-01-06 10:48:00,347 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-01-06 10:48:00,814 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-01-06 10:48:03,960 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-01-06 10:48:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 6 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:48:07,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289486382] [2021-01-06 10:48:07,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989335692] [2021-01-06 10:48:07,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:08,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 10:48:08,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:48:08,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 148 conjunts are in the unsatisfiable core [2021-01-06 10:48:08,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:08,525 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 10:48:08,529 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:48:08,559 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:48:08,565 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:48:08,566 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10