/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/reducercommutativity/rangesum20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:15:03,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:15:03,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:15:03,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:15:03,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:15:03,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:15:03,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:15:03,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:15:03,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:15:03,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:15:03,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:15:03,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:15:03,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:15:03,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:15:03,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:15:03,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:15:03,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:15:03,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:15:03,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:15:03,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:15:03,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:15:03,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:15:03,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:15:03,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:15:03,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:15:03,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:15:03,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:15:03,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:15:03,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:15:03,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:15:03,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:15:03,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:15:03,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:15:03,786 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:15:03,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:15:03,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:15:03,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:15:03,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:15:03,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:15:03,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:15:03,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:15:03,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:15:03,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:15:03,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:15:03,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:15:03,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:15:03,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:15:03,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:15:03,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:15:03,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:15:03,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:15:03,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:15:03,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:15:03,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:15:03,793 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:15:04,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:15:04,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:15:04,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:15:04,402 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:15:04,403 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:15:04,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum20.i [2021-01-06 10:15:04,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/92ad6e631/d819763fc3034f2e9c6e33786bd9a333/FLAGcff6890bf [2021-01-06 10:15:05,244 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:15:05,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i [2021-01-06 10:15:05,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/92ad6e631/d819763fc3034f2e9c6e33786bd9a333/FLAGcff6890bf [2021-01-06 10:15:05,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/92ad6e631/d819763fc3034f2e9c6e33786bd9a333 [2021-01-06 10:15:05,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:15:05,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:15:05,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:15:05,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:15:05,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:15:05,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:05,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1133e805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05, skipping insertion in model container [2021-01-06 10:15:05,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:05,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:15:05,633 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~cnt~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[19]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:15:05,827 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/reducercommutativity/rangesum20.i[1465,1478] [2021-01-06 10:15:05,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:15:05,843 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~cnt~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[76],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:15:05,875 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/reducercommutativity/rangesum20.i[1465,1478] [2021-01-06 10:15:05,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:15:05,899 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:15:05,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05 WrapperNode [2021-01-06 10:15:05,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:15:05,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:15:05,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:15:05,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:15:05,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:05,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:06,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:15:06,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:15:06,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:15:06,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:15:06,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:06,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:06,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:06,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:06,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:06,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:06,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (1/1) ... [2021-01-06 10:15:06,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:15:06,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:15:06,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:15:06,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:15:06,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:15:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:15:06,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:15:06,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:15:06,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:15:06,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:15:06,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:15:06,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:15:06,988 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:15:06,988 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-01-06 10:15:06,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:15:06 BoogieIcfgContainer [2021-01-06 10:15:06,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:15:06,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:15:07,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:15:07,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:15:07,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:15:05" (1/3) ... [2021-01-06 10:15:07,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40bac772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:15:07, skipping insertion in model container [2021-01-06 10:15:07,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:05" (2/3) ... [2021-01-06 10:15:07,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40bac772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:15:07, skipping insertion in model container [2021-01-06 10:15:07,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:15:06" (3/3) ... [2021-01-06 10:15:07,011 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2021-01-06 10:15:07,020 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:15:07,027 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:15:07,060 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:15:07,113 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:15:07,113 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:15:07,113 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:15:07,114 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:15:07,114 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:15:07,114 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:15:07,114 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:15:07,115 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:15:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-01-06 10:15:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:15:07,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:07,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:07,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:07,163 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-01-06 10:15:07,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:07,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50779304] [2021-01-06 10:15:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:15:07,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50779304] [2021-01-06 10:15:07,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:07,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:15:07,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632778627] [2021-01-06 10:15:07,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:15:07,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:07,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:15:07,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:15:07,459 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2021-01-06 10:15:07,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:07,482 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-01-06 10:15:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:15:07,484 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-01-06 10:15:07,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:07,495 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:15:07,496 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:15:07,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:15:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:15:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 10:15:07,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:15:07,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-01-06 10:15:07,543 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2021-01-06 10:15:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:07,544 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-01-06 10:15:07,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:15:07,544 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-01-06 10:15:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:15:07,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:07,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:07,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:15:07,546 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2021-01-06 10:15:07,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:07,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690590399] [2021-01-06 10:15:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:07,568 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:07,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563526678] [2021-01-06 10:15:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:07,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:15:07,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:15:07,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690590399] [2021-01-06 10:15:07,700 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:07,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563526678] [2021-01-06 10:15:07,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:07,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:15:07,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942947681] [2021-01-06 10:15:07,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:07,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:07,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:15:07,705 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2021-01-06 10:15:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:07,724 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2021-01-06 10:15:07,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:07,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:15:07,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:07,726 INFO L225 Difference]: With dead ends: 50 [2021-01-06 10:15:07,726 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:15:07,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:15:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:15:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 10:15:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:15:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 10:15:07,734 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-01-06 10:15:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:07,735 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 10:15:07,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 10:15:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:15:07,736 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:07,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:07,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:15:07,951 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:07,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-01-06 10:15:07,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:07,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723879494] [2021-01-06 10:15:07,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:15:08,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723879494] [2021-01-06 10:15:08,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303760414] [2021-01-06 10:15:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:08,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:15:08,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:15:08,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:08,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:15:08,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014711486] [2021-01-06 10:15:08,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:08,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:08,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:08,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:08,176 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2021-01-06 10:15:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:08,243 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-01-06 10:15:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:08,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:15:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:08,245 INFO L225 Difference]: With dead ends: 57 [2021-01-06 10:15:08,245 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 10:15:08,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 10:15:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-01-06 10:15:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:15:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-01-06 10:15:08,254 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-01-06 10:15:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:08,255 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-01-06 10:15:08,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-01-06 10:15:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:15:08,256 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:08,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:08,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:08,465 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:08,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:08,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-01-06 10:15:08,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:08,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223951216] [2021-01-06 10:15:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:15:08,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223951216] [2021-01-06 10:15:08,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77727317] [2021-01-06 10:15:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:15:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:08,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:08,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:15:08,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026830155] [2021-01-06 10:15:08,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:08,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:08,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:08,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:08,717 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2021-01-06 10:15:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:08,746 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-01-06 10:15:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:08,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2021-01-06 10:15:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:08,751 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:15:08,752 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:15:08,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:15:08,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-01-06 10:15:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:15:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-01-06 10:15:08,772 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-01-06 10:15:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:08,772 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-01-06 10:15:08,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:08,773 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-01-06 10:15:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:15:08,777 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:08,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:08,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:08,996 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:08,998 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-01-06 10:15:08,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:08,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568793182] [2021-01-06 10:15:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:09,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568793182] [2021-01-06 10:15:09,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977211959] [2021-01-06 10:15:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:09,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:15:09,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:09,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:15:09,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564105112] [2021-01-06 10:15:09,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:09,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:09,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:09,221 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2021-01-06 10:15:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:09,273 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-01-06 10:15:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:09,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2021-01-06 10:15:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:09,276 INFO L225 Difference]: With dead ends: 78 [2021-01-06 10:15:09,276 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 10:15:09,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 10:15:09,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-01-06 10:15:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:15:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-01-06 10:15:09,287 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-01-06 10:15:09,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:09,287 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-01-06 10:15:09,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-01-06 10:15:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:15:09,288 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:09,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:09,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:09,504 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:09,506 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-01-06 10:15:09,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:09,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762247816] [2021-01-06 10:15:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:09,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762247816] [2021-01-06 10:15:09,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930810603] [2021-01-06 10:15:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:09,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:09,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:09,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:09,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:15:09,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424134797] [2021-01-06 10:15:09,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:09,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:09,750 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2021-01-06 10:15:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:09,802 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2021-01-06 10:15:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:09,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2021-01-06 10:15:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:09,804 INFO L225 Difference]: With dead ends: 90 [2021-01-06 10:15:09,804 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:15:09,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:15:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 10:15:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:15:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-01-06 10:15:09,825 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2021-01-06 10:15:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:09,826 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-01-06 10:15:09,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-01-06 10:15:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:15:09,828 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:09,828 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:10,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:15:10,043 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:10,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:10,044 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2021-01-06 10:15:10,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:10,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128760087] [2021-01-06 10:15:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:15:10,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128760087] [2021-01-06 10:15:10,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678613991] [2021-01-06 10:15:10,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:10,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:15:10,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:10,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:15:10,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 10:15:10,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:10,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-01-06 10:15:10,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963872238] [2021-01-06 10:15:10,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:10,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:10,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:10,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:10,302 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2021-01-06 10:15:10,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:10,402 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-01-06 10:15:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:10,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-01-06 10:15:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:10,409 INFO L225 Difference]: With dead ends: 114 [2021-01-06 10:15:10,409 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 10:15:10,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 10:15:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-01-06 10:15:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 10:15:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-01-06 10:15:10,429 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2021-01-06 10:15:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:10,430 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-01-06 10:15:10,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:10,430 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-01-06 10:15:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:15:10,431 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:10,432 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:10,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:10,644 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:10,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:10,645 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2021-01-06 10:15:10,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:10,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011122058] [2021-01-06 10:15:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 10:15:10,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011122058] [2021-01-06 10:15:10,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174291516] [2021-01-06 10:15:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:10,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:10,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 10:15:10,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:10,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 10:15:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155800034] [2021-01-06 10:15:10,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:10,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:10,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:10,874 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2021-01-06 10:15:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:10,998 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2021-01-06 10:15:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:10,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 10:15:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:11,002 INFO L225 Difference]: With dead ends: 162 [2021-01-06 10:15:11,002 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 10:15:11,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 10:15:11,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-01-06 10:15:11,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:15:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-01-06 10:15:11,015 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2021-01-06 10:15:11,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:11,015 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-01-06 10:15:11,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:11,016 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-01-06 10:15:11,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:15:11,017 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:11,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:11,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:11,232 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:11,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2021-01-06 10:15:11,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:11,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911016987] [2021-01-06 10:15:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:11,254 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:11,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858352986] [2021-01-06 10:15:11,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:11,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:11,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 10:15:11,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911016987] [2021-01-06 10:15:11,483 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:11,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858352986] [2021-01-06 10:15:11,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:11,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:11,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234297463] [2021-01-06 10:15:11,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:11,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:11,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:11,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:11,487 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2021-01-06 10:15:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:11,515 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-01-06 10:15:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:11,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-01-06 10:15:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:11,518 INFO L225 Difference]: With dead ends: 174 [2021-01-06 10:15:11,518 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:15:11,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:15:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 10:15:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:15:11,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2021-01-06 10:15:11,529 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2021-01-06 10:15:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:11,530 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2021-01-06 10:15:11,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:11,530 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2021-01-06 10:15:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 10:15:11,532 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:11,532 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:11,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:15:11,746 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:11,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:11,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2021-01-06 10:15:11,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:11,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398357817] [2021-01-06 10:15:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:15:11,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398357817] [2021-01-06 10:15:11,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:11,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:15:11,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064522262] [2021-01-06 10:15:11,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:15:11,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:11,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:15:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:11,835 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2021-01-06 10:15:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:11,915 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2021-01-06 10:15:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:11,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2021-01-06 10:15:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:11,917 INFO L225 Difference]: With dead ends: 177 [2021-01-06 10:15:11,917 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:15:11,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:15:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-01-06 10:15:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:15:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-01-06 10:15:11,932 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2021-01-06 10:15:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:11,933 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-01-06 10:15:11,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:15:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-01-06 10:15:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 10:15:11,938 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:11,938 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:11,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 10:15:11,939 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:11,943 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2021-01-06 10:15:11,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:11,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220681919] [2021-01-06 10:15:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:11,970 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:11,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330439394] [2021-01-06 10:15:11,971 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:12,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 10:15:12,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220681919] [2021-01-06 10:15:12,150 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:12,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330439394] [2021-01-06 10:15:12,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:12,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:15:12,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482118189] [2021-01-06 10:15:12,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:12,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:12,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:12,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:12,153 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2021-01-06 10:15:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:12,187 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-01-06 10:15:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:12,188 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2021-01-06 10:15:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:12,189 INFO L225 Difference]: With dead ends: 158 [2021-01-06 10:15:12,190 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:15:12,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:15:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 10:15:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 10:15:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-01-06 10:15:12,198 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2021-01-06 10:15:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:12,198 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-01-06 10:15:12,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-01-06 10:15:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:15:12,200 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:12,200 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:12,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:12,415 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:12,417 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2021-01-06 10:15:12,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:12,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599134840] [2021-01-06 10:15:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:12,444 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:12,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938685623] [2021-01-06 10:15:12,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:12,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:12,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:15:12,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 10:15:12,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599134840] [2021-01-06 10:15:12,684 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:12,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938685623] [2021-01-06 10:15:12,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:12,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:15:12,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241757440] [2021-01-06 10:15:12,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:12,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:12,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:12,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:15:12,686 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 8 states. [2021-01-06 10:15:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:12,722 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-01-06 10:15:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:12,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2021-01-06 10:15:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:12,724 INFO L225 Difference]: With dead ends: 160 [2021-01-06 10:15:12,724 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 10:15:12,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:15:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 10:15:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 10:15:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 10:15:12,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-01-06 10:15:12,732 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2021-01-06 10:15:12,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:12,732 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-01-06 10:15:12,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-01-06 10:15:12,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:15:12,734 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:12,734 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:12,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:12,949 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:12,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:12,950 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2021-01-06 10:15:12,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:12,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262411276] [2021-01-06 10:15:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:12,965 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:12,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917377026] [2021-01-06 10:15:12,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:13,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:15:13,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-01-06 10:15:13,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262411276] [2021-01-06 10:15:13,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917377026] [2021-01-06 10:15:13,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:13,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:15:13,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219555440] [2021-01-06 10:15:13,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:15:13,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:13,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:15:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:13,155 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2021-01-06 10:15:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:13,192 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2021-01-06 10:15:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:13,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2021-01-06 10:15:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:13,197 INFO L225 Difference]: With dead ends: 116 [2021-01-06 10:15:13,197 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 10:15:13,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 10:15:13,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2021-01-06 10:15:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:15:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-01-06 10:15:13,209 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2021-01-06 10:15:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:13,209 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-01-06 10:15:13,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:15:13,210 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-01-06 10:15:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:15:13,212 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:13,213 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:13,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:15:13,429 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:13,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:13,430 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2021-01-06 10:15:13,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:13,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909149307] [2021-01-06 10:15:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:13,446 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:13,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386236331] [2021-01-06 10:15:13,447 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:13,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:15:13,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 10:15:13,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909149307] [2021-01-06 10:15:13,665 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:13,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386236331] [2021-01-06 10:15:13,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:13,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:15:13,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498113450] [2021-01-06 10:15:13,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:15:13,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:13,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:15:13,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:13,667 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2021-01-06 10:15:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:13,704 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-01-06 10:15:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:15:13,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-01-06 10:15:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:13,706 INFO L225 Difference]: With dead ends: 106 [2021-01-06 10:15:13,706 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 10:15:13,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 10:15:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-01-06 10:15:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 10:15:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-01-06 10:15:13,712 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2021-01-06 10:15:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:13,712 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-01-06 10:15:13,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:15:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-01-06 10:15:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 10:15:13,713 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:13,713 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:13,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:15:13,929 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:13,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2021-01-06 10:15:13,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:13,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693963554] [2021-01-06 10:15:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:13,948 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:13,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648652744] [2021-01-06 10:15:13,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 10:15:14,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:14,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:14,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:15:14,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 10:15:14,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693963554] [2021-01-06 10:15:14,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:14,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648652744] [2021-01-06 10:15:14,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:14,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:15:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662549486] [2021-01-06 10:15:14,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:15:14,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:15:14,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:14,237 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2021-01-06 10:15:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:14,281 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2021-01-06 10:15:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:15:14,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2021-01-06 10:15:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:14,282 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:15:14,283 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 10:15:14,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:14,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 10:15:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 10:15:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:15:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-01-06 10:15:14,292 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2021-01-06 10:15:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:14,292 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-01-06 10:15:14,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:15:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-01-06 10:15:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 10:15:14,293 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:14,293 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:14,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:15:14,507 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:14,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2021-01-06 10:15:14,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:14,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498679696] [2021-01-06 10:15:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:14,525 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:14,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804361851] [2021-01-06 10:15:14,525 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 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 [2021-01-06 10:15:14,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:15:14,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:14,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:15:14,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498679696] [2021-01-06 10:15:14,672 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:14,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804361851] [2021-01-06 10:15:14,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:14,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:15:14,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528268209] [2021-01-06 10:15:14,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:15:14,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:14,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:15:14,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:14,674 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2021-01-06 10:15:14,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:14,700 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-01-06 10:15:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:14,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2021-01-06 10:15:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:14,701 INFO L225 Difference]: With dead ends: 82 [2021-01-06 10:15:14,701 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:15:14,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:15:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-01-06 10:15:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:15:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-01-06 10:15:14,707 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2021-01-06 10:15:14,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:14,707 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-01-06 10:15:14,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:15:14,707 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-01-06 10:15:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 10:15:14,708 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:14,708 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:14,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:14,923 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:14,924 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2021-01-06 10:15:14,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:14,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162824152] [2021-01-06 10:15:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:14,940 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:14,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651584097] [2021-01-06 10:15:14,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:14,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:15,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:15,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 10:15:15,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162824152] [2021-01-06 10:15:15,090 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:15,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651584097] [2021-01-06 10:15:15,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:15,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:15:15,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610165265] [2021-01-06 10:15:15,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:15,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:15,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:15,093 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2021-01-06 10:15:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:15,181 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2021-01-06 10:15:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:15:15,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2021-01-06 10:15:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:15,182 INFO L225 Difference]: With dead ends: 117 [2021-01-06 10:15:15,182 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 10:15:15,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 10:15:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-01-06 10:15:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:15:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-01-06 10:15:15,188 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2021-01-06 10:15:15,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:15,188 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-01-06 10:15:15,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:15,189 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-01-06 10:15:15,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:15:15,189 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:15,190 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:15,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:15:15,405 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:15,406 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2021-01-06 10:15:15,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:15,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692909717] [2021-01-06 10:15:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:15,422 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:15,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653462899] [2021-01-06 10:15:15,423 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 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 [2021-01-06 10:15:15,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 10:15:15,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:15,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:15,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 10:15:15,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692909717] [2021-01-06 10:15:15,706 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:15,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653462899] [2021-01-06 10:15:15,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:15,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:15,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761889678] [2021-01-06 10:15:15,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:15,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:15,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:15,708 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2021-01-06 10:15:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:15,816 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-01-06 10:15:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:15,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2021-01-06 10:15:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:15,818 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:15:15,818 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:15:15,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:15:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-01-06 10:15:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:15:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-01-06 10:15:15,826 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2021-01-06 10:15:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:15,827 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-01-06 10:15:15,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-01-06 10:15:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 10:15:15,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:15,830 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:16,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:15:16,041 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:16,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:16,042 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2021-01-06 10:15:16,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:16,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957578140] [2021-01-06 10:15:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:16,060 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:16,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370975764] [2021-01-06 10:15:16,061 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 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 [2021-01-06 10:15:16,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:15:16,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:16,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 10:15:16,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957578140] [2021-01-06 10:15:16,483 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:16,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370975764] [2021-01-06 10:15:16,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:16,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:15:16,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814787719] [2021-01-06 10:15:16,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:16,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:16,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:16,485 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2021-01-06 10:15:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:16,507 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2021-01-06 10:15:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:15:16,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2021-01-06 10:15:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:16,509 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:15:16,509 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:15:16,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:15:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 10:15:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 10:15:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-01-06 10:15:16,516 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2021-01-06 10:15:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:16,516 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-01-06 10:15:16,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-01-06 10:15:16,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 10:15:16,517 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:16,517 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:16,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:16,731 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:16,732 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2021-01-06 10:15:16,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:16,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765024256] [2021-01-06 10:15:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:16,748 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:16,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953395121] [2021-01-06 10:15:16,748 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 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 [2021-01-06 10:15:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:15:16,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-01-06 10:15:17,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765024256] [2021-01-06 10:15:17,000 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:17,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953395121] [2021-01-06 10:15:17,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:17,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:15:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031041937] [2021-01-06 10:15:17,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:15:17,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:15:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:17,002 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 11 states. [2021-01-06 10:15:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:17,071 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2021-01-06 10:15:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:15:17,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2021-01-06 10:15:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:17,073 INFO L225 Difference]: With dead ends: 154 [2021-01-06 10:15:17,073 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 10:15:17,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 10:15:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 10:15:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 10:15:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2021-01-06 10:15:17,079 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2021-01-06 10:15:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:17,080 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2021-01-06 10:15:17,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:15:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2021-01-06 10:15:17,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:15:17,081 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:17,081 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:17,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:17,297 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:17,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:17,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2021-01-06 10:15:17,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:17,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764450872] [2021-01-06 10:15:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:17,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:17,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785696709] [2021-01-06 10:15:17,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:17,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:17,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:17,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:15:17,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-01-06 10:15:17,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764450872] [2021-01-06 10:15:17,702 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:17,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785696709] [2021-01-06 10:15:17,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:17,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:15:17,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165653421] [2021-01-06 10:15:17,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:15:17,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:17,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:15:17,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:15:17,704 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 12 states. [2021-01-06 10:15:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:17,748 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2021-01-06 10:15:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:15:17,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2021-01-06 10:15:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:17,750 INFO L225 Difference]: With dead ends: 156 [2021-01-06 10:15:17,750 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 10:15:17,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:15:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 10:15:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-01-06 10:15:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 10:15:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2021-01-06 10:15:17,756 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2021-01-06 10:15:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:17,756 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2021-01-06 10:15:17,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:15:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2021-01-06 10:15:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 10:15:17,757 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:17,757 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:17,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:17,962 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:17,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2021-01-06 10:15:17,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:17,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387167309] [2021-01-06 10:15:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:17,980 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:17,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75264020] [2021-01-06 10:15:17,980 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 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 [2021-01-06 10:15:18,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:15:18,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-01-06 10:15:18,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387167309] [2021-01-06 10:15:18,417 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:18,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75264020] [2021-01-06 10:15:18,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:18,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:15:18,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046992741] [2021-01-06 10:15:18,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:18,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:18,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:18,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:18,421 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2021-01-06 10:15:18,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:18,509 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-01-06 10:15:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:15:18,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2021-01-06 10:15:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:18,511 INFO L225 Difference]: With dead ends: 153 [2021-01-06 10:15:18,511 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:15:18,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:15:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-01-06 10:15:18,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 10:15:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-01-06 10:15:18,518 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2021-01-06 10:15:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:18,518 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-01-06 10:15:18,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-01-06 10:15:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 10:15:18,519 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:18,520 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:18,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:15:18,734 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2021-01-06 10:15:18,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:18,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150316097] [2021-01-06 10:15:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:18,753 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:18,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097847546] [2021-01-06 10:15:18,758 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 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 [2021-01-06 10:15:18,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:18,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:18,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:18,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-01-06 10:15:18,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150316097] [2021-01-06 10:15:18,961 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:18,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097847546] [2021-01-06 10:15:18,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:18,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:15:18,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704092004] [2021-01-06 10:15:18,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:18,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:18,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:18,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:18,963 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 7 states. [2021-01-06 10:15:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:19,071 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2021-01-06 10:15:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:19,072 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2021-01-06 10:15:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:19,073 INFO L225 Difference]: With dead ends: 173 [2021-01-06 10:15:19,073 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 10:15:19,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 10:15:19,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-01-06 10:15:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 10:15:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-01-06 10:15:19,081 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 97 [2021-01-06 10:15:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:19,081 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-01-06 10:15:19,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-01-06 10:15:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:15:19,082 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:19,083 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:19,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:15:19,298 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash -983224722, now seen corresponding path program 11 times [2021-01-06 10:15:19,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:19,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258987211] [2021-01-06 10:15:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:19,316 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:19,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883138870] [2021-01-06 10:15:19,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:19,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:15:19,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:19,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:15:19,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-01-06 10:15:19,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258987211] [2021-01-06 10:15:19,693 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:19,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883138870] [2021-01-06 10:15:19,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:19,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:15:19,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183430737] [2021-01-06 10:15:19,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:19,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:19,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:19,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:15:19,696 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 8 states. [2021-01-06 10:15:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:19,822 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2021-01-06 10:15:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:19,823 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2021-01-06 10:15:19,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:19,824 INFO L225 Difference]: With dead ends: 188 [2021-01-06 10:15:19,824 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 10:15:19,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:15:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 10:15:19,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2021-01-06 10:15:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:15:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-01-06 10:15:19,832 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 106 [2021-01-06 10:15:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:19,832 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-01-06 10:15:19,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-01-06 10:15:19,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 10:15:19,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:19,834 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:20,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:20,049 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:20,050 INFO L82 PathProgramCache]: Analyzing trace with hash -700509419, now seen corresponding path program 12 times [2021-01-06 10:15:20,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:20,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014245989] [2021-01-06 10:15:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:20,069 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:20,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012573058] [2021-01-06 10:15:20,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:20,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:15:20,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:20,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 10:15:20,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014245989] [2021-01-06 10:15:20,630 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:20,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012573058] [2021-01-06 10:15:20,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:20,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:20,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294021448] [2021-01-06 10:15:20,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:20,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:20,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:20,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:20,632 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 6 states. [2021-01-06 10:15:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:20,657 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2021-01-06 10:15:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:20,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2021-01-06 10:15:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:20,659 INFO L225 Difference]: With dead ends: 150 [2021-01-06 10:15:20,659 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 10:15:20,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:20,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 10:15:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-01-06 10:15:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 10:15:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2021-01-06 10:15:20,666 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 115 [2021-01-06 10:15:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:20,666 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2021-01-06 10:15:20,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2021-01-06 10:15:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 10:15:20,667 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:20,667 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:20,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:15:20,870 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:20,871 INFO L82 PathProgramCache]: Analyzing trace with hash -111816429, now seen corresponding path program 13 times [2021-01-06 10:15:20,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:20,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145864696] [2021-01-06 10:15:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:20,886 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:20,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271144017] [2021-01-06 10:15:20,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:20,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:15:20,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-01-06 10:15:21,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145864696] [2021-01-06 10:15:21,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:21,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271144017] [2021-01-06 10:15:21,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:21,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:15:21,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421866310] [2021-01-06 10:15:21,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:15:21,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:21,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:15:21,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:15:21,172 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 13 states. [2021-01-06 10:15:21,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:21,232 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2021-01-06 10:15:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:15:21,233 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 117 [2021-01-06 10:15:21,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:21,234 INFO L225 Difference]: With dead ends: 216 [2021-01-06 10:15:21,234 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 10:15:21,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:15:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 10:15:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-01-06 10:15:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 10:15:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2021-01-06 10:15:21,241 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 117 [2021-01-06 10:15:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:21,241 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2021-01-06 10:15:21,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:15:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2021-01-06 10:15:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 10:15:21,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:21,243 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:21,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:21,456 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:21,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1032300881, now seen corresponding path program 14 times [2021-01-06 10:15:21,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:21,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831725483] [2021-01-06 10:15:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:21,473 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:21,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859953732] [2021-01-06 10:15:21,474 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:21,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:21,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:21,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:15:21,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-01-06 10:15:21,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831725483] [2021-01-06 10:15:21,860 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:21,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859953732] [2021-01-06 10:15:21,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:21,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 10:15:21,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351350408] [2021-01-06 10:15:21,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:15:21,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:21,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:15:21,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:15:21,864 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand 14 states. [2021-01-06 10:15:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:21,926 INFO L93 Difference]: Finished difference Result 218 states and 238 transitions. [2021-01-06 10:15:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:15:21,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2021-01-06 10:15:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:21,928 INFO L225 Difference]: With dead ends: 218 [2021-01-06 10:15:21,928 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 10:15:21,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:15:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 10:15:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-01-06 10:15:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 10:15:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2021-01-06 10:15:21,935 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 119 [2021-01-06 10:15:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:21,935 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2021-01-06 10:15:21,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:15:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2021-01-06 10:15:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 10:15:21,936 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:21,937 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:22,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:15:22,150 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:22,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1017408015, now seen corresponding path program 15 times [2021-01-06 10:15:22,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:22,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008304557] [2021-01-06 10:15:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:22,168 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:22,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211642993] [2021-01-06 10:15:22,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:22,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:15:22,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:22,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:22,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-01-06 10:15:22,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008304557] [2021-01-06 10:15:22,747 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:22,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211642993] [2021-01-06 10:15:22,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:22,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:22,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176210772] [2021-01-06 10:15:22,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:22,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:22,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:22,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:22,749 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 6 states. [2021-01-06 10:15:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:22,854 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2021-01-06 10:15:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:22,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2021-01-06 10:15:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:22,856 INFO L225 Difference]: With dead ends: 206 [2021-01-06 10:15:22,856 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 10:15:22,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:22,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 10:15:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2021-01-06 10:15:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 10:15:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2021-01-06 10:15:22,864 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 121 [2021-01-06 10:15:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:22,865 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2021-01-06 10:15:22,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2021-01-06 10:15:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 10:15:22,866 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:22,866 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:23,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:15:23,080 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash 171712334, now seen corresponding path program 16 times [2021-01-06 10:15:23,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:23,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476445417] [2021-01-06 10:15:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:23,096 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:23,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261683843] [2021-01-06 10:15:23,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:23,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:23,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:23,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:15:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 53 proven. 57 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-01-06 10:15:23,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476445417] [2021-01-06 10:15:23,359 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:23,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261683843] [2021-01-06 10:15:23,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:23,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:15:23,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228220686] [2021-01-06 10:15:23,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:15:23,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:23,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:15:23,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:23,361 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 9 states. [2021-01-06 10:15:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:23,518 INFO L93 Difference]: Finished difference Result 229 states and 257 transitions. [2021-01-06 10:15:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:15:23,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2021-01-06 10:15:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:23,520 INFO L225 Difference]: With dead ends: 229 [2021-01-06 10:15:23,520 INFO L226 Difference]: Without dead ends: 143 [2021-01-06 10:15:23,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-01-06 10:15:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2021-01-06 10:15:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-01-06 10:15:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2021-01-06 10:15:23,528 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 130 [2021-01-06 10:15:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:23,528 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2021-01-06 10:15:23,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:15:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2021-01-06 10:15:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-01-06 10:15:23,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:23,530 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 10, 10, 7, 7, 7, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:23,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:15:23,745 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:23,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1108040979, now seen corresponding path program 17 times [2021-01-06 10:15:23,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:23,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405345914] [2021-01-06 10:15:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:23,761 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:23,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853007149] [2021-01-06 10:15:23,761 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:24,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 10:15:24,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:15:24,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-01-06 10:15:24,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405345914] [2021-01-06 10:15:24,408 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:24,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853007149] [2021-01-06 10:15:24,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:24,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:15:24,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541290794] [2021-01-06 10:15:24,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:15:24,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:15:24,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:24,411 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand 10 states. [2021-01-06 10:15:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:24,572 INFO L93 Difference]: Finished difference Result 244 states and 272 transitions. [2021-01-06 10:15:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:15:24,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 139 [2021-01-06 10:15:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:24,575 INFO L225 Difference]: With dead ends: 244 [2021-01-06 10:15:24,575 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 10:15:24,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 10:15:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2021-01-06 10:15:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2021-01-06 10:15:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2021-01-06 10:15:24,583 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 139 [2021-01-06 10:15:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:24,583 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2021-01-06 10:15:24,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:15:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2021-01-06 10:15:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-01-06 10:15:24,585 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:24,585 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 8, 8, 8, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:24,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:24,800 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:24,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1198235730, now seen corresponding path program 18 times [2021-01-06 10:15:24,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:24,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655189404] [2021-01-06 10:15:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:24,815 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:24,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286526390] [2021-01-06 10:15:24,816 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:25,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:15:25,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:25,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-01-06 10:15:25,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655189404] [2021-01-06 10:15:25,542 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:25,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286526390] [2021-01-06 10:15:25,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:25,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:15:25,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769791295] [2021-01-06 10:15:25,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:25,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:25,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:25,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:25,544 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand 7 states. [2021-01-06 10:15:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:25,577 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2021-01-06 10:15:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:25,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2021-01-06 10:15:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:25,579 INFO L225 Difference]: With dead ends: 192 [2021-01-06 10:15:25,579 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 10:15:25,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 10:15:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-01-06 10:15:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 10:15:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 164 transitions. [2021-01-06 10:15:25,587 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 164 transitions. Word has length 148 [2021-01-06 10:15:25,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:25,588 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 164 transitions. [2021-01-06 10:15:25,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:25,588 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 164 transitions. [2021-01-06 10:15:25,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 10:15:25,589 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:25,589 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:25,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 10:15:25,804 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash -747380432, now seen corresponding path program 19 times [2021-01-06 10:15:25,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:25,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739650879] [2021-01-06 10:15:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:25,823 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:25,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449505739] [2021-01-06 10:15:25,823 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:25,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:15:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-01-06 10:15:26,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739650879] [2021-01-06 10:15:26,197 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:26,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449505739] [2021-01-06 10:15:26,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:26,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:15:26,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066638813] [2021-01-06 10:15:26,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:15:26,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:26,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:15:26,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:15:26,199 INFO L87 Difference]: Start difference. First operand 151 states and 164 transitions. Second operand 15 states. [2021-01-06 10:15:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:26,266 INFO L93 Difference]: Finished difference Result 278 states and 304 transitions. [2021-01-06 10:15:26,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:15:26,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 150 [2021-01-06 10:15:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:26,268 INFO L225 Difference]: With dead ends: 278 [2021-01-06 10:15:26,268 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 10:15:26,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:15:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 10:15:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-01-06 10:15:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 10:15:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2021-01-06 10:15:26,300 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 150 [2021-01-06 10:15:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:26,300 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2021-01-06 10:15:26,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:15:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2021-01-06 10:15:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-01-06 10:15:26,301 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:26,301 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:26,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:26,516 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:26,517 INFO L82 PathProgramCache]: Analyzing trace with hash 881756338, now seen corresponding path program 20 times [2021-01-06 10:15:26,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:26,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303900450] [2021-01-06 10:15:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:26,534 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:26,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388998558] [2021-01-06 10:15:26,534 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:26,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:26,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:26,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:15:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-01-06 10:15:26,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303900450] [2021-01-06 10:15:26,974 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:26,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388998558] [2021-01-06 10:15:26,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:26,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:15:26,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530372096] [2021-01-06 10:15:26,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:15:26,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:26,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:15:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:15:26,977 INFO L87 Difference]: Start difference. First operand 153 states and 166 transitions. Second operand 16 states. [2021-01-06 10:15:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:27,039 INFO L93 Difference]: Finished difference Result 280 states and 306 transitions. [2021-01-06 10:15:27,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:15:27,040 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 152 [2021-01-06 10:15:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:27,041 INFO L225 Difference]: With dead ends: 280 [2021-01-06 10:15:27,041 INFO L226 Difference]: Without dead ends: 156 [2021-01-06 10:15:27,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:15:27,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-01-06 10:15:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-01-06 10:15:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 10:15:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 168 transitions. [2021-01-06 10:15:27,049 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 168 transitions. Word has length 152 [2021-01-06 10:15:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:27,050 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 168 transitions. [2021-01-06 10:15:27,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:15:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 168 transitions. [2021-01-06 10:15:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 10:15:27,051 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:27,051 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:27,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:15:27,252 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1180870732, now seen corresponding path program 21 times [2021-01-06 10:15:27,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:27,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848221208] [2021-01-06 10:15:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:27,270 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:27,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703535164] [2021-01-06 10:15:27,271 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true