/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-programs/partial_mod_count_limited_base.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:43:32,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:43:32,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:43:32,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:43:32,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:43:32,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:43:32,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:43:32,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:43:32,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:43:32,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:43:32,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:43:32,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:43:32,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:43:32,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:43:32,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:43:32,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:43:32,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:43:32,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:43:32,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:43:32,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:43:32,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:43:32,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:43:32,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:43:32,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:43:32,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 00:43:32,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 00:43:32,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 00:43:32,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 00:43:32,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 00:43:32,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 00:43:32,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 00:43:32,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 00:43:32,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 00:43:32,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 00:43:32,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 00:43:32,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 00:43:32,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 00:43:32,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 00:43:32,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:43:32,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:43:32,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:43:32,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:43:32,829 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:43:32,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:43:32,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:43:32,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:43:32,835 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:43:32,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:43:32,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:43:32,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:43:32,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:43:32,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:43:32,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:43:32,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:43:32,838 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:43:32,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:43:32,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:43:32,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:43:32,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:43:32,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:43:32,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:43:32,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:43:32,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:43:32,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:43:32,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:43:32,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:43:32,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:43:32,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:43:33,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:43:33,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:43:33,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:43:33,317 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:43:33,318 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:43:33,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2020-12-23 00:43:33,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/332ebf4d4/47896a28823f472aa734c068c596447b/FLAG2ff1cfcfc [2020-12-23 00:43:34,177 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:43:34,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2020-12-23 00:43:34,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/332ebf4d4/47896a28823f472aa734c068c596447b/FLAG2ff1cfcfc [2020-12-23 00:43:34,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/332ebf4d4/47896a28823f472aa734c068c596447b [2020-12-23 00:43:34,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:43:34,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:43:34,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:43:34,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:43:34,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:43:34,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0bba9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34, skipping insertion in model container [2020-12-23 00:43:34,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:43:34,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:43:34,774 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-programs/partial_mod_count_limited_base.c[334,347] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:43:34,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:43:34,812 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:43:34,828 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-programs/partial_mod_count_limited_base.c[334,347] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:43:34,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:43:34,858 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:43:34,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34 WrapperNode [2020-12-23 00:43:34,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:43:34,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:43:34,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:43:34,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:43:34,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:43:34,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:43:34,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:43:34,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:43:34,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (1/1) ... [2020-12-23 00:43:34,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:43:34,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:43:34,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:43:34,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:43:34,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:43:35,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:43:35,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:43:35,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:43:35,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:43:35,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:43:35,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:43:35,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:43:35,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:43:35,434 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 00:43:35,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:43:35 BoogieIcfgContainer [2020-12-23 00:43:35,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:43:35,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:43:35,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:43:35,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:43:35,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:43:34" (1/3) ... [2020-12-23 00:43:35,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72569202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:43:35, skipping insertion in model container [2020-12-23 00:43:35,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:34" (2/3) ... [2020-12-23 00:43:35,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72569202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:43:35, skipping insertion in model container [2020-12-23 00:43:35,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:43:35" (3/3) ... [2020-12-23 00:43:35,456 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_base.c [2020-12-23 00:43:35,505 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:43:35,510 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:43:35,549 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:43:35,599 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:43:35,601 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:43:35,602 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:43:35,602 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:43:35,602 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:43:35,602 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:43:35,603 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:43:35,603 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:43:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 00:43:35,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:43:35,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:35,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:35,640 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:35,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:35,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2020-12-23 00:43:35,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:35,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118358819] [2020-12-23 00:43:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:43:35,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118358819] [2020-12-23 00:43:35,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:43:35,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:43:35,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539625379] [2020-12-23 00:43:35,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:43:35,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:35,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:43:35,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:43:35,977 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 00:43:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:35,998 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2020-12-23 00:43:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:43:36,000 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 00:43:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:36,029 INFO L225 Difference]: With dead ends: 39 [2020-12-23 00:43:36,029 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 00:43:36,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:43:36,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 00:43:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 00:43:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:43:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-23 00:43:36,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-12-23 00:43:36,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:36,079 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-23 00:43:36,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:43:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-23 00:43:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:43:36,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:36,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:36,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:43:36,083 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:36,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:36,087 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2020-12-23 00:43:36,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:36,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223539353] [2020-12-23 00:43:36,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:43:36,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223539353] [2020-12-23 00:43:36,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:43:36,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:43:36,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032344479] [2020-12-23 00:43:36,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:43:36,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:36,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:43:36,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:43:36,229 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-12-23 00:43:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:36,296 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-23 00:43:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:43:36,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 00:43:36,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:36,297 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:43:36,298 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:43:36,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:43:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:43:36,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-23 00:43:36,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:43:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-23 00:43:36,306 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-23 00:43:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:36,306 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-23 00:43:36,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:43:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-23 00:43:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:43:36,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:36,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:36,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:43:36,308 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:36,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2020-12-23 00:43:36,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:36,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509794750] [2020-12-23 00:43:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:43:36,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509794750] [2020-12-23 00:43:36,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:43:36,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:43:36,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428111216] [2020-12-23 00:43:36,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:43:36,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:36,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:43:36,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:43:36,433 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-23 00:43:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:36,498 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-12-23 00:43:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:43:36,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 00:43:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:36,500 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:43:36,500 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:43:36,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:43:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:43:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-12-23 00:43:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:43:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-23 00:43:36,506 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2020-12-23 00:43:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:36,507 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-23 00:43:36,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:43:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-23 00:43:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:43:36,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:36,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:36,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:43:36,508 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:36,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:36,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2129460565, now seen corresponding path program 1 times [2020-12-23 00:43:36,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:36,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080147615] [2020-12-23 00:43:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:43:36,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080147615] [2020-12-23 00:43:36,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:43:36,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:43:36,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151410147] [2020-12-23 00:43:36,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:43:36,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:36,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:43:36,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:43:36,658 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2020-12-23 00:43:36,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:36,688 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-23 00:43:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:43:36,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-23 00:43:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:36,690 INFO L225 Difference]: With dead ends: 32 [2020-12-23 00:43:36,690 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:43:36,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:43:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:43:36,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-12-23 00:43:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:43:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-23 00:43:36,698 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2020-12-23 00:43:36,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:36,699 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-23 00:43:36,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:43:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-23 00:43:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:43:36,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:36,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:36,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:43:36,700 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2129520147, now seen corresponding path program 1 times [2020-12-23 00:43:36,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:36,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020638191] [2020-12-23 00:43:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:43:36,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020638191] [2020-12-23 00:43:36,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:43:36,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:43:36,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950040144] [2020-12-23 00:43:36,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:43:36,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:36,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:43:36,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:43:36,758 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2020-12-23 00:43:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:36,803 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-12-23 00:43:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:43:36,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 00:43:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:36,804 INFO L225 Difference]: With dead ends: 37 [2020-12-23 00:43:36,804 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:43:36,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:43:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:43:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-12-23 00:43:36,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:43:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-23 00:43:36,812 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2020-12-23 00:43:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:36,813 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-23 00:43:36,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:43:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-23 00:43:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:43:36,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:36,814 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:36,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 00:43:36,815 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:36,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1393431485, now seen corresponding path program 1 times [2020-12-23 00:43:36,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:36,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668157852] [2020-12-23 00:43:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:36,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668157852] [2020-12-23 00:43:36,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646573843] [2020-12-23 00:43:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:36,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:43:36,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:37,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:43:37,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:43:37,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901519562] [2020-12-23 00:43:37,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:43:37,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:37,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:43:37,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:43:37,083 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-12-23 00:43:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:37,151 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2020-12-23 00:43:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:43:37,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-23 00:43:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:37,153 INFO L225 Difference]: With dead ends: 83 [2020-12-23 00:43:37,153 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:43:37,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:43:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:43:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2020-12-23 00:43:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:43:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-23 00:43:37,162 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2020-12-23 00:43:37,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:37,162 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-23 00:43:37,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:43:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-23 00:43:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:43:37,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:37,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:37,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:43:37,377 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:37,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1589095526, now seen corresponding path program 1 times [2020-12-23 00:43:37,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:37,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078334955] [2020-12-23 00:43:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:37,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078334955] [2020-12-23 00:43:37,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222163830] [2020-12-23 00:43:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:43:37,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:37,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:43:37,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2020-12-23 00:43:37,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091425915] [2020-12-23 00:43:37,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:43:37,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:37,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:43:37,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:43:37,679 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 10 states. [2020-12-23 00:43:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:37,949 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2020-12-23 00:43:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:43:37,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-12-23 00:43:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:37,954 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:43:37,954 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 00:43:37,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:43:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 00:43:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 39. [2020-12-23 00:43:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 00:43:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-12-23 00:43:37,972 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 26 [2020-12-23 00:43:37,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:37,972 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-12-23 00:43:37,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:43:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-12-23 00:43:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 00:43:37,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:37,976 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:38,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:38,177 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash -442192347, now seen corresponding path program 2 times [2020-12-23 00:43:38,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:38,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995351201] [2020-12-23 00:43:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:43:38,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995351201] [2020-12-23 00:43:38,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936644657] [2020-12-23 00:43:38,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:38,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:43:38,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:38,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:43:38,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:38,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:43:38,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 00:43:38,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142932011] [2020-12-23 00:43:38,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:43:38,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:38,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:43:38,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:43:38,524 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 12 states. [2020-12-23 00:43:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:39,034 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2020-12-23 00:43:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:43:39,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-12-23 00:43:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:39,037 INFO L225 Difference]: With dead ends: 143 [2020-12-23 00:43:39,038 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 00:43:39,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:43:39,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 00:43:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 56. [2020-12-23 00:43:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:43:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-12-23 00:43:39,051 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 31 [2020-12-23 00:43:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:39,052 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-12-23 00:43:39,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:43:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-12-23 00:43:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 00:43:39,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:39,055 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:39,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:39,271 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1071498680, now seen corresponding path program 2 times [2020-12-23 00:43:39,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:39,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648495583] [2020-12-23 00:43:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:39,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648495583] [2020-12-23 00:43:39,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183071742] [2020-12-23 00:43:39,387 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:39,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:43:39,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:43:39,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:39,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:43:39,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 00:43:39,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370481729] [2020-12-23 00:43:39,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:43:39,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:43:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:43:39,637 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 13 states. [2020-12-23 00:43:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:39,791 INFO L93 Difference]: Finished difference Result 207 states and 247 transitions. [2020-12-23 00:43:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:43:39,792 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-12-23 00:43:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:39,794 INFO L225 Difference]: With dead ends: 207 [2020-12-23 00:43:39,794 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 00:43:39,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:43:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 00:43:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 56. [2020-12-23 00:43:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:43:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-12-23 00:43:39,804 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 36 [2020-12-23 00:43:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:39,805 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-12-23 00:43:39,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:43:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-12-23 00:43:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:43:39,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:39,806 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:40,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:40,022 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:40,023 INFO L82 PathProgramCache]: Analyzing trace with hash 4107907, now seen corresponding path program 3 times [2020-12-23 00:43:40,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:40,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189210002] [2020-12-23 00:43:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:40,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189210002] [2020-12-23 00:43:40,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031150136] [2020-12-23 00:43:40,192 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:40,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:43:40,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:40,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:43:40,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 00:43:40,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:43:40,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-23 00:43:40,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747133391] [2020-12-23 00:43:40,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:43:40,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:40,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:43:40,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:43:40,386 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2020-12-23 00:43:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:41,195 INFO L93 Difference]: Finished difference Result 367 states and 435 transitions. [2020-12-23 00:43:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:43:41,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-12-23 00:43:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:41,198 INFO L225 Difference]: With dead ends: 367 [2020-12-23 00:43:41,198 INFO L226 Difference]: Without dead ends: 349 [2020-12-23 00:43:41,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:43:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-23 00:43:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 76. [2020-12-23 00:43:41,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:43:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2020-12-23 00:43:41,212 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 41 [2020-12-23 00:43:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:41,213 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2020-12-23 00:43:41,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:43:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2020-12-23 00:43:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:43:41,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:41,215 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:41,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:43:41,429 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:41,430 INFO L82 PathProgramCache]: Analyzing trace with hash 867646876, now seen corresponding path program 1 times [2020-12-23 00:43:41,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:41,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509610759] [2020-12-23 00:43:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:41,448 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:41,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848222608] [2020-12-23 00:43:41,448 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:41,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:43:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:41,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509610759] [2020-12-23 00:43:41,667 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:41,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848222608] [2020-12-23 00:43:41,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:41,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:43:41,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288579571] [2020-12-23 00:43:41,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:43:41,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:41,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:43:41,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:43:41,670 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand 10 states. [2020-12-23 00:43:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:41,849 INFO L93 Difference]: Finished difference Result 302 states and 363 transitions. [2020-12-23 00:43:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:43:41,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-12-23 00:43:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:41,852 INFO L225 Difference]: With dead ends: 302 [2020-12-23 00:43:41,852 INFO L226 Difference]: Without dead ends: 252 [2020-12-23 00:43:41,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:43:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-23 00:43:41,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 86. [2020-12-23 00:43:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 00:43:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2020-12-23 00:43:41,865 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 46 [2020-12-23 00:43:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:41,865 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2020-12-23 00:43:41,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:43:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2020-12-23 00:43:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:43:41,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:41,867 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:42,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:42,082 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1544530789, now seen corresponding path program 3 times [2020-12-23 00:43:42,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:42,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904849629] [2020-12-23 00:43:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:43:42,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904849629] [2020-12-23 00:43:42,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947506302] [2020-12-23 00:43:42,271 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:42,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:43:42,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:42,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:43:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:43:42,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:43:42,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-12-23 00:43:42,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102480626] [2020-12-23 00:43:42,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:43:42,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:42,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:43:42,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:43:42,644 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 19 states. [2020-12-23 00:43:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:46,593 INFO L93 Difference]: Finished difference Result 366 states and 450 transitions. [2020-12-23 00:43:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 00:43:46,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-12-23 00:43:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:46,596 INFO L225 Difference]: With dead ends: 366 [2020-12-23 00:43:46,596 INFO L226 Difference]: Without dead ends: 348 [2020-12-23 00:43:46,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1648, Invalid=4514, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 00:43:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-23 00:43:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 123. [2020-12-23 00:43:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 00:43:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2020-12-23 00:43:46,614 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 51 [2020-12-23 00:43:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:46,614 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2020-12-23 00:43:46,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:43:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2020-12-23 00:43:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:43:46,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:46,616 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:46,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:46,830 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash 76873861, now seen corresponding path program 2 times [2020-12-23 00:43:46,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:46,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353165145] [2020-12-23 00:43:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:46,849 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:46,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17011856] [2020-12-23 00:43:46,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:46,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:43:46,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:46,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:43:46,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-23 00:43:47,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353165145] [2020-12-23 00:43:47,015 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:47,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17011856] [2020-12-23 00:43:47,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:43:47,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:43:47,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292628119] [2020-12-23 00:43:47,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:43:47,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:47,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:43:47,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:43:47,018 INFO L87 Difference]: Start difference. First operand 123 states and 154 transitions. Second operand 4 states. [2020-12-23 00:43:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:47,046 INFO L93 Difference]: Finished difference Result 228 states and 289 transitions. [2020-12-23 00:43:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:43:47,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-23 00:43:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:47,052 INFO L225 Difference]: With dead ends: 228 [2020-12-23 00:43:47,052 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 00:43:47,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:43:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 00:43:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2020-12-23 00:43:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 00:43:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2020-12-23 00:43:47,075 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 61 [2020-12-23 00:43:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:47,077 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2020-12-23 00:43:47,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:43:47,077 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2020-12-23 00:43:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:43:47,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:47,080 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:47,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:43:47,281 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:47,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:47,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1073413637, now seen corresponding path program 4 times [2020-12-23 00:43:47,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:47,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341163183] [2020-12-23 00:43:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:43:47,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341163183] [2020-12-23 00:43:47,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85952944] [2020-12-23 00:43:47,527 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:47,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:43:47,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:47,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:43:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:47,703 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 17 treesize of output 13 [2020-12-23 00:43:47,704 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:43:47,710 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:43:47,710 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:43:47,711 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 00:43:47,757 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-23 00:43:47,759 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:43:47,764 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:43:47,766 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:43:47,766 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2020-12-23 00:43:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 00:43:47,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:43:47,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 19 [2020-12-23 00:43:47,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458557772] [2020-12-23 00:43:47,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:43:47,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:47,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:43:47,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:43:47,810 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand 19 states. [2020-12-23 00:43:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:48,894 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2020-12-23 00:43:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:43:48,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-12-23 00:43:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:48,896 INFO L225 Difference]: With dead ends: 270 [2020-12-23 00:43:48,897 INFO L226 Difference]: Without dead ends: 220 [2020-12-23 00:43:48,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:43:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-23 00:43:48,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 105. [2020-12-23 00:43:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 00:43:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2020-12-23 00:43:48,907 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 61 [2020-12-23 00:43:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:48,908 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2020-12-23 00:43:48,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:43:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2020-12-23 00:43:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 00:43:48,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:48,909 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:49,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:49,124 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2024298556, now seen corresponding path program 3 times [2020-12-23 00:43:49,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:49,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156686282] [2020-12-23 00:43:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:49,140 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:49,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70030096] [2020-12-23 00:43:49,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:49,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 00:43:49,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:49,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:43:49,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:49,311 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:43:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 185 proven. 70 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 00:43:49,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156686282] [2020-12-23 00:43:49,511 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:49,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70030096] [2020-12-23 00:43:49,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:49,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:43:49,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768512260] [2020-12-23 00:43:49,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:43:49,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:43:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:43:49,513 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand 11 states. [2020-12-23 00:43:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:50,035 INFO L93 Difference]: Finished difference Result 272 states and 317 transitions. [2020-12-23 00:43:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:43:50,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-12-23 00:43:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:50,038 INFO L225 Difference]: With dead ends: 272 [2020-12-23 00:43:50,038 INFO L226 Difference]: Without dead ends: 254 [2020-12-23 00:43:50,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:43:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-23 00:43:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 115. [2020-12-23 00:43:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 00:43:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2020-12-23 00:43:50,052 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 76 [2020-12-23 00:43:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:50,052 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2020-12-23 00:43:50,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:43:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2020-12-23 00:43:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 00:43:50,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:50,054 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:50,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:43:50,269 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:50,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1166078337, now seen corresponding path program 4 times [2020-12-23 00:43:50,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:50,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409836116] [2020-12-23 00:43:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:50,291 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:50,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716652637] [2020-12-23 00:43:50,292 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:50,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:43:50,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:50,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:43:50,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:50,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409836116] [2020-12-23 00:43:50,774 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:50,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716652637] [2020-12-23 00:43:50,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:50,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 00:43:50,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504734701] [2020-12-23 00:43:50,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:43:50,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:50,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:43:50,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:43:50,777 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand 17 states. [2020-12-23 00:43:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:51,092 INFO L93 Difference]: Finished difference Result 459 states and 539 transitions. [2020-12-23 00:43:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:43:51,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-12-23 00:43:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:51,095 INFO L225 Difference]: With dead ends: 459 [2020-12-23 00:43:51,095 INFO L226 Difference]: Without dead ends: 380 [2020-12-23 00:43:51,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:43:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-12-23 00:43:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 150. [2020-12-23 00:43:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 00:43:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2020-12-23 00:43:51,109 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 81 [2020-12-23 00:43:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:51,109 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2020-12-23 00:43:51,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:43:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2020-12-23 00:43:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 00:43:51,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:51,111 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:51,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:43:51,324 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash -350545868, now seen corresponding path program 5 times [2020-12-23 00:43:51,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:51,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411809217] [2020-12-23 00:43:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:51,347 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:51,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781294264] [2020-12-23 00:43:51,349 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:52,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 00:43:52,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:52,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:43:52,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:52,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411809217] [2020-12-23 00:43:52,676 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:52,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781294264] [2020-12-23 00:43:52,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:52,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 00:43:52,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206622996] [2020-12-23 00:43:52,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:43:52,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:52,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:43:52,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:43:52,679 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand 24 states. [2020-12-23 00:43:53,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:53,162 INFO L93 Difference]: Finished difference Result 613 states and 714 transitions. [2020-12-23 00:43:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:43:53,163 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 116 [2020-12-23 00:43:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:53,167 INFO L225 Difference]: With dead ends: 613 [2020-12-23 00:43:53,167 INFO L226 Difference]: Without dead ends: 534 [2020-12-23 00:43:53,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:43:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-12-23 00:43:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 185. [2020-12-23 00:43:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 00:43:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 202 transitions. [2020-12-23 00:43:53,183 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 202 transitions. Word has length 116 [2020-12-23 00:43:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:53,184 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 202 transitions. [2020-12-23 00:43:53,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:43:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 202 transitions. [2020-12-23 00:43:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 00:43:53,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:53,187 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:53,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:43:53,402 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:53,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2125285983, now seen corresponding path program 6 times [2020-12-23 00:43:53,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:53,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108218169] [2020-12-23 00:43:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:53,427 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:53,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397336642] [2020-12-23 00:43:53,427 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:54,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:43:54,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:54,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:43:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:54,397 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:43:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 693 proven. 99 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2020-12-23 00:43:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108218169] [2020-12-23 00:43:54,637 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397336642] [2020-12-23 00:43:54,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:54,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:43:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263366643] [2020-12-23 00:43:54,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:43:54,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:54,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:43:54,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:43:54,639 INFO L87 Difference]: Start difference. First operand 185 states and 202 transitions. Second operand 12 states. [2020-12-23 00:43:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:55,280 INFO L93 Difference]: Finished difference Result 377 states and 428 transitions. [2020-12-23 00:43:55,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 00:43:55,281 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2020-12-23 00:43:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:55,283 INFO L225 Difference]: With dead ends: 377 [2020-12-23 00:43:55,283 INFO L226 Difference]: Without dead ends: 359 [2020-12-23 00:43:55,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=370, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:43:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-12-23 00:43:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 195. [2020-12-23 00:43:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 00:43:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 214 transitions. [2020-12-23 00:43:55,299 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 214 transitions. Word has length 151 [2020-12-23 00:43:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:55,300 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 214 transitions. [2020-12-23 00:43:55,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:43:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 214 transitions. [2020-12-23 00:43:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 00:43:55,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:55,301 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:55,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:43:55,517 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash 125499964, now seen corresponding path program 7 times [2020-12-23 00:43:55,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:55,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213433501] [2020-12-23 00:43:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:55,540 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:55,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541970609] [2020-12-23 00:43:55,540 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:55,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:43:55,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:56,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213433501] [2020-12-23 00:43:56,735 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:56,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541970609] [2020-12-23 00:43:56,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:56,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-23 00:43:56,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004758249] [2020-12-23 00:43:56,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:43:56,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:56,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:43:56,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:43:56,738 INFO L87 Difference]: Start difference. First operand 195 states and 214 transitions. Second operand 32 states. [2020-12-23 00:43:57,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:57,375 INFO L93 Difference]: Finished difference Result 809 states and 939 transitions. [2020-12-23 00:43:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:43:57,375 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2020-12-23 00:43:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:57,379 INFO L225 Difference]: With dead ends: 809 [2020-12-23 00:43:57,379 INFO L226 Difference]: Without dead ends: 720 [2020-12-23 00:43:57,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:43:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2020-12-23 00:43:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 235. [2020-12-23 00:43:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-23 00:43:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 254 transitions. [2020-12-23 00:43:57,399 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 254 transitions. Word has length 156 [2020-12-23 00:43:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:57,399 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 254 transitions. [2020-12-23 00:43:57,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:43:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 254 transitions. [2020-12-23 00:43:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-23 00:43:57,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:57,401 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:57,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:57,602 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:57,603 INFO L82 PathProgramCache]: Analyzing trace with hash 802096572, now seen corresponding path program 8 times [2020-12-23 00:43:57,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:57,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138499826] [2020-12-23 00:43:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:57,631 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:57,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424844727] [2020-12-23 00:43:57,632 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:57,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:43:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:57,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:43:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3190 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:43:59,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138499826] [2020-12-23 00:43:59,320 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:59,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424844727] [2020-12-23 00:43:59,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:59,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-23 00:43:59,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888177477] [2020-12-23 00:43:59,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:43:59,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:59,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:43:59,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:43:59,325 INFO L87 Difference]: Start difference. First operand 235 states and 254 transitions. Second operand 40 states. [2020-12-23 00:44:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:00,312 INFO L93 Difference]: Finished difference Result 985 states and 1139 transitions. [2020-12-23 00:44:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:44:00,312 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 196 [2020-12-23 00:44:00,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:00,317 INFO L225 Difference]: With dead ends: 985 [2020-12-23 00:44:00,317 INFO L226 Difference]: Without dead ends: 896 [2020-12-23 00:44:00,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:44:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-23 00:44:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 275. [2020-12-23 00:44:00,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-23 00:44:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 294 transitions. [2020-12-23 00:44:00,345 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 294 transitions. Word has length 196 [2020-12-23 00:44:00,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:00,345 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 294 transitions. [2020-12-23 00:44:00,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:44:00,346 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 294 transitions. [2020-12-23 00:44:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-23 00:44:00,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:00,349 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:00,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:00,563 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:00,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1508798148, now seen corresponding path program 9 times [2020-12-23 00:44:00,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:00,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752749397] [2020-12-23 00:44:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:00,598 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:44:00,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043067402] [2020-12-23 00:44:00,598 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:00,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:44:00,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:00,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:44:00,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:00,942 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:44:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4778 backedges. 1419 proven. 133 refuted. 0 times theorem prover too weak. 3226 trivial. 0 not checked. [2020-12-23 00:44:01,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752749397] [2020-12-23 00:44:01,303 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:44:01,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043067402] [2020-12-23 00:44:01,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:01,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:44:01,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775593706] [2020-12-23 00:44:01,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:44:01,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:01,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:44:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:44:01,305 INFO L87 Difference]: Start difference. First operand 275 states and 294 transitions. Second operand 13 states. [2020-12-23 00:44:02,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:02,052 INFO L93 Difference]: Finished difference Result 492 states and 549 transitions. [2020-12-23 00:44:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:44:02,053 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 236 [2020-12-23 00:44:02,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:02,056 INFO L225 Difference]: With dead ends: 492 [2020-12-23 00:44:02,056 INFO L226 Difference]: Without dead ends: 474 [2020-12-23 00:44:02,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:44:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-12-23 00:44:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 285. [2020-12-23 00:44:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-23 00:44:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2020-12-23 00:44:02,083 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 236 [2020-12-23 00:44:02,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:02,083 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2020-12-23 00:44:02,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:44:02,083 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2020-12-23 00:44:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-23 00:44:02,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:02,087 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:02,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:02,301 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:02,302 INFO L82 PathProgramCache]: Analyzing trace with hash -890145409, now seen corresponding path program 10 times [2020-12-23 00:44:02,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:02,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508886357] [2020-12-23 00:44:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:02,334 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:44:02,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133730849] [2020-12-23 00:44:02,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:04,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:04,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:04,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 00:44:04,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4999 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:06,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508886357] [2020-12-23 00:44:06,727 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:44:06,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133730849] [2020-12-23 00:44:06,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:06,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-12-23 00:44:06,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946126528] [2020-12-23 00:44:06,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 00:44:06,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:06,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 00:44:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:44:06,733 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand 49 states. [2020-12-23 00:44:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:08,093 INFO L93 Difference]: Finished difference Result 1203 states and 1389 transitions. [2020-12-23 00:44:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 00:44:08,096 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 241 [2020-12-23 00:44:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:08,101 INFO L225 Difference]: With dead ends: 1203 [2020-12-23 00:44:08,101 INFO L226 Difference]: Without dead ends: 1104 [2020-12-23 00:44:08,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:44:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2020-12-23 00:44:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 330. [2020-12-23 00:44:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-12-23 00:44:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 351 transitions. [2020-12-23 00:44:08,130 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 351 transitions. Word has length 241 [2020-12-23 00:44:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:08,131 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 351 transitions. [2020-12-23 00:44:08,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 00:44:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 351 transitions. [2020-12-23 00:44:08,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-23 00:44:08,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:08,135 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:08,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:44:08,349 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash -39345644, now seen corresponding path program 11 times [2020-12-23 00:44:08,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:08,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538758692] [2020-12-23 00:44:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:08,387 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:44:08,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299664758] [2020-12-23 00:44:08,387 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:09,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2020-12-23 00:47:09,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:47:09,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 00:47:09,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7213 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:47:12,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538758692] [2020-12-23 00:47:12,625 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:47:12,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299664758] [2020-12-23 00:47:12,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:47:12,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-12-23 00:47:12,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284708897] [2020-12-23 00:47:12,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 00:47:12,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:12,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 00:47:12,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 00:47:12,629 INFO L87 Difference]: Start difference. First operand 330 states and 351 transitions. Second operand 58 states. [2020-12-23 00:47:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:14,794 INFO L93 Difference]: Finished difference Result 1401 states and 1614 transitions. [2020-12-23 00:47:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 00:47:14,795 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 286 [2020-12-23 00:47:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:14,801 INFO L225 Difference]: With dead ends: 1401 [2020-12-23 00:47:14,801 INFO L226 Difference]: Without dead ends: 1302 [2020-12-23 00:47:14,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 00:47:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2020-12-23 00:47:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 375. [2020-12-23 00:47:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-12-23 00:47:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 396 transitions. [2020-12-23 00:47:14,837 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 396 transitions. Word has length 286 [2020-12-23 00:47:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:14,838 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 396 transitions. [2020-12-23 00:47:14,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 00:47:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 396 transitions. [2020-12-23 00:47:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-12-23 00:47:14,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:14,843 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:15,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:47:15,057 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:15,058 INFO L82 PathProgramCache]: Analyzing trace with hash 966681503, now seen corresponding path program 12 times [2020-12-23 00:47:15,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:15,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143929308] [2020-12-23 00:47:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:15,103 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:47:15,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457654573] [2020-12-23 00:47:15,104 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:16,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 00:47:16,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:47:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:47:16,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:16,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:47:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9832 backedges. 2393 proven. 172 refuted. 0 times theorem prover too weak. 7267 trivial. 0 not checked. [2020-12-23 00:47:17,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143929308] [2020-12-23 00:47:17,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:47:17,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457654573] [2020-12-23 00:47:17,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:47:17,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:47:17,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336570196] [2020-12-23 00:47:17,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:47:17,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:17,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:47:17,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:47:17,265 INFO L87 Difference]: Start difference. First operand 375 states and 396 transitions. Second operand 14 states. [2020-12-23 00:47:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:18,104 INFO L93 Difference]: Finished difference Result 617 states and 680 transitions. [2020-12-23 00:47:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:47:18,105 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 331 [2020-12-23 00:47:18,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:18,109 INFO L225 Difference]: With dead ends: 617 [2020-12-23 00:47:18,109 INFO L226 Difference]: Without dead ends: 599 [2020-12-23 00:47:18,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:47:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-12-23 00:47:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 385. [2020-12-23 00:47:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-12-23 00:47:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 408 transitions. [2020-12-23 00:47:18,141 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 408 transitions. Word has length 331 [2020-12-23 00:47:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:18,142 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 408 transitions. [2020-12-23 00:47:18,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:47:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 408 transitions. [2020-12-23 00:47:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-23 00:47:18,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:18,144 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:18,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:47:18,358 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:18,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:18,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1853380356, now seen corresponding path program 13 times [2020-12-23 00:47:18,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:18,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351264677] [2020-12-23 00:47:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:18,404 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:47:18,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075023678] [2020-12-23 00:47:18,405 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:47:18,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 00:47:18,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10148 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:47:22,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351264677] [2020-12-23 00:47:22,699 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:47:22,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075023678] [2020-12-23 00:47:22,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:47:22,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-12-23 00:47:22,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434632175] [2020-12-23 00:47:22,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 00:47:22,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:22,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 00:47:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 00:47:22,704 INFO L87 Difference]: Start difference. First operand 385 states and 408 transitions. Second operand 68 states. [2020-12-23 00:47:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:25,165 INFO L93 Difference]: Finished difference Result 1641 states and 1889 transitions. [2020-12-23 00:47:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 00:47:25,166 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 336 [2020-12-23 00:47:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:25,172 INFO L225 Difference]: With dead ends: 1641 [2020-12-23 00:47:25,172 INFO L226 Difference]: Without dead ends: 1532 [2020-12-23 00:47:25,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 00:47:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2020-12-23 00:47:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 435. [2020-12-23 00:47:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-23 00:47:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 458 transitions. [2020-12-23 00:47:25,214 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 458 transitions. Word has length 336 [2020-12-23 00:47:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:25,215 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 458 transitions. [2020-12-23 00:47:25,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 00:47:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 458 transitions. [2020-12-23 00:47:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-12-23 00:47:25,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:25,218 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 73, 73, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:25,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:47:25,433 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:25,434 INFO L82 PathProgramCache]: Analyzing trace with hash 608865116, now seen corresponding path program 14 times [2020-12-23 00:47:25,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:25,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964696315] [2020-12-23 00:47:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:25,483 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:47:25,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915571804] [2020-12-23 00:47:25,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:25,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:47:25,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:47:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 00:47:25,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13583 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:47:31,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964696315] [2020-12-23 00:47:31,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:47:31,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915571804] [2020-12-23 00:47:31,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:47:31,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-12-23 00:47:31,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099266001] [2020-12-23 00:47:31,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 00:47:31,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:31,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 00:47:31,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 00:47:31,239 INFO L87 Difference]: Start difference. First operand 435 states and 458 transitions. Second operand 78 states. [2020-12-23 00:47:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:34,909 INFO L93 Difference]: Finished difference Result 1861 states and 2139 transitions. [2020-12-23 00:47:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 00:47:34,910 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 386 [2020-12-23 00:47:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:34,917 INFO L225 Difference]: With dead ends: 1861 [2020-12-23 00:47:34,917 INFO L226 Difference]: Without dead ends: 1752 [2020-12-23 00:47:34,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 00:47:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2020-12-23 00:47:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 485. [2020-12-23 00:47:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-12-23 00:47:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 508 transitions. [2020-12-23 00:47:34,980 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 508 transitions. Word has length 386 [2020-12-23 00:47:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:34,981 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 508 transitions. [2020-12-23 00:47:34,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 00:47:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 508 transitions. [2020-12-23 00:47:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-12-23 00:47:34,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:34,985 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 83, 83, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:35,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:47:35,200 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:35,201 INFO L82 PathProgramCache]: Analyzing trace with hash -419686980, now seen corresponding path program 15 times [2020-12-23 00:47:35,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:35,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188527814] [2020-12-23 00:47:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:35,261 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:47:35,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639908790] [2020-12-23 00:47:35,261 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:35,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-23 00:47:35,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:47:35,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:47:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:35,846 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:47:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17518 backedges. 3645 proven. 216 refuted. 0 times theorem prover too weak. 13657 trivial. 0 not checked. [2020-12-23 00:47:36,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188527814] [2020-12-23 00:47:36,420 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:47:36,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639908790] [2020-12-23 00:47:36,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:47:36,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 00:47:36,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508616982] [2020-12-23 00:47:36,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:47:36,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:36,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:47:36,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:47:36,422 INFO L87 Difference]: Start difference. First operand 485 states and 508 transitions. Second operand 15 states. [2020-12-23 00:47:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:37,495 INFO L93 Difference]: Finished difference Result 752 states and 821 transitions. [2020-12-23 00:47:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:47:37,496 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 436 [2020-12-23 00:47:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:37,498 INFO L225 Difference]: With dead ends: 752 [2020-12-23 00:47:37,498 INFO L226 Difference]: Without dead ends: 734 [2020-12-23 00:47:37,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=416, Invalid=706, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:47:37,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-12-23 00:47:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 495. [2020-12-23 00:47:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-12-23 00:47:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 520 transitions. [2020-12-23 00:47:37,542 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 520 transitions. Word has length 436 [2020-12-23 00:47:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:37,543 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 520 transitions. [2020-12-23 00:47:37,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:47:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 520 transitions. [2020-12-23 00:47:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2020-12-23 00:47:37,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:37,547 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 85, 84, 84, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:37,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:37,760 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:37,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1503280897, now seen corresponding path program 16 times [2020-12-23 00:47:37,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:37,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416621428] [2020-12-23 00:47:37,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:37,817 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:47:37,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463087482] [2020-12-23 00:47:37,817 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true