/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/nla-digbench-scaling/prod4br-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:55:45,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:55:45,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:55:46,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:55:46,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:55:46,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:55:46,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:55:46,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:55:46,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:55:46,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:55:46,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:55:46,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:55:46,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:55:46,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:55:46,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:55:46,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:55:46,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:55:46,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:55:46,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:55:46,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:55:46,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:55:46,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:55:46,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:55:46,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:55:46,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:55:46,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:55:46,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:55:46,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:55:46,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:55:46,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:55:46,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:55:46,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:55:46,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:55:46,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:55:46,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:55:46,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:55:46,055 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 17:55:46,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:55:46,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:55:46,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:55:46,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:55:46,119 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:55:46,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:55:46,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:55:46,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:55:46,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:55:46,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:55:46,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:55:46,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:55:46,122 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:55:46,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:55:46,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:55:46,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:55:46,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:55:46,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:55:46,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:55:46,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:55:46,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:55:46,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:55:46,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:55:46,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:55:46,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:55:46,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:55:46,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:55:46,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:55:46,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:55:46,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:55:46,580 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:55:46,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2021-01-06 17:55:46,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f617a766/fe48b81f2cce4701a861e6f8255963c2/FLAG64705e8ba [2021-01-06 17:55:47,411 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:55:47,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2021-01-06 17:55:47,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f617a766/fe48b81f2cce4701a861e6f8255963c2/FLAG64705e8ba [2021-01-06 17:55:47,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f617a766/fe48b81f2cce4701a861e6f8255963c2 [2021-01-06 17:55:47,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:55:47,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:55:47,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:55:47,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:55:47,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:55:47,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:55:47" (1/1) ... [2021-01-06 17:55:47,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f58577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:47, skipping insertion in model container [2021-01-06 17:55:47,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:55:47" (1/1) ... [2021-01-06 17:55:47,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:55:47,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:55:47,958 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/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2021-01-06 17:55:47,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:55:47,999 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:55:48,015 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/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2021-01-06 17:55:48,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:55:48,045 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:55:48,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48 WrapperNode [2021-01-06 17:55:48,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:55:48,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:55:48,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:55:48,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:55:48,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (1/1) ... [2021-01-06 17:55:48,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (1/1) ... [2021-01-06 17:55:48,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:55:48,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:55:48,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:55:48,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:55:48,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (1/1) ... [2021-01-06 17:55:48,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (1/1) ... [2021-01-06 17:55:48,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (1/1) ... [2021-01-06 17:55:48,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (1/1) ... [2021-01-06 17:55:48,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (1/1) ... [2021-01-06 17:55:48,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (1/1) ... [2021-01-06 17:55:48,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (1/1) ... [2021-01-06 17:55:48,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:55:48,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:55:48,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:55:48,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:55:48,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (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 17:55:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:55:48,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:55:48,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:55:48,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:55:48,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:55:48,550 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:55:48,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:55:48 BoogieIcfgContainer [2021-01-06 17:55:48,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:55:48,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:55:48,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:55:48,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:55:48,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:55:47" (1/3) ... [2021-01-06 17:55:48,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c6eba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:55:48, skipping insertion in model container [2021-01-06 17:55:48,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:48" (2/3) ... [2021-01-06 17:55:48,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c6eba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:55:48, skipping insertion in model container [2021-01-06 17:55:48,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:55:48" (3/3) ... [2021-01-06 17:55:48,564 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2021-01-06 17:55:48,573 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:55:48,581 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 17:55:48,629 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 17:55:48,697 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:55:48,697 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:55:48,697 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:55:48,698 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:55:48,699 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:55:48,700 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:55:48,700 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:55:48,700 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:55:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2021-01-06 17:55:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:55:48,734 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:48,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:48,735 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:48,744 INFO L82 PathProgramCache]: Analyzing trace with hash 120613195, now seen corresponding path program 1 times [2021-01-06 17:55:48,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:48,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270643173] [2021-01-06 17:55:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:49,004 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 17:55:49,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270643173] [2021-01-06 17:55:49,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:55:49,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:55:49,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926538710] [2021-01-06 17:55:49,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:55:49,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:49,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:55:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:55:49,036 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2021-01-06 17:55:49,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:49,056 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-01-06 17:55:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:55:49,058 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 17:55:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:49,083 INFO L225 Difference]: With dead ends: 47 [2021-01-06 17:55:49,084 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 17:55:49,087 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 17:55:49,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 17:55:49,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 17:55:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:55:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-01-06 17:55:49,120 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2021-01-06 17:55:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:49,120 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-01-06 17:55:49,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:55:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-01-06 17:55:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:55:49,121 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:49,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:49,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:55:49,122 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:49,123 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-01-06 17:55:49,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:49,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470006546] [2021-01-06 17:55:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:49,146 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:49,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776909157] [2021-01-06 17:55:49,147 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 17:55:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:49,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:55:49,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:49,567 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 17:55:49,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470006546] [2021-01-06 17:55:49,568 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:49,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776909157] [2021-01-06 17:55:49,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:55:49,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:55:49,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742807458] [2021-01-06 17:55:49,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:55:49,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:55:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:55:49,588 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2021-01-06 17:55:50,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:50,089 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-01-06 17:55:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:55:50,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 17:55:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:50,093 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:55:50,093 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:55:50,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:55:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:55:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2021-01-06 17:55:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 17:55:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-01-06 17:55:50,107 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2021-01-06 17:55:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:50,109 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-01-06 17:55:50,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:55:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-01-06 17:55:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:55:50,110 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:50,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:50,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:55:50,320 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1182850160, now seen corresponding path program 1 times [2021-01-06 17:55:50,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:50,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979548643] [2021-01-06 17:55:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:50,379 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 17:55:50,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979548643] [2021-01-06 17:55:50,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:55:50,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:55:50,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162474128] [2021-01-06 17:55:50,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:55:50,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:50,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:55:50,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:55:50,382 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2021-01-06 17:55:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:50,406 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-01-06 17:55:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:55:50,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 17:55:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:50,409 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:55:50,410 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:55:50,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:55:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:55:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 17:55:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 17:55:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 17:55:50,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-01-06 17:55:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:50,424 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 17:55:50,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:55:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 17:55:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:55:50,425 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:50,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:50,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:55:50,426 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:50,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1415754199, now seen corresponding path program 1 times [2021-01-06 17:55:50,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:50,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424047177] [2021-01-06 17:55:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:50,463 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:50,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460687503] [2021-01-06 17:55:50,465 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 17:55:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:50,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:55:50,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:50,604 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:55:50,812 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-01-06 17:55:50,894 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:55:50,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:55:50,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:55:50,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:55:50,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:55:50,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:55:50,969 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 17:55:50,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424047177] [2021-01-06 17:55:50,970 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:50,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460687503] [2021-01-06 17:55:50,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:55:50,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 17:55:50,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721368661] [2021-01-06 17:55:50,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:55:50,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:50,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:55:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:55:50,973 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 9 states. [2021-01-06 17:55:51,300 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-01-06 17:55:51,557 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 20 [2021-01-06 17:55:54,804 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-01-06 17:55:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:56,020 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-01-06 17:55:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:55:56,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2021-01-06 17:55:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:56,022 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:55:56,022 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:55:56,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:55:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:55:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-01-06 17:55:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:55:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-01-06 17:55:56,033 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 11 [2021-01-06 17:55:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:56,033 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-01-06 17:55:56,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:55:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-01-06 17:55:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:55:56,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:56,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:56,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:56,242 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:56,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:56,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1005087291, now seen corresponding path program 1 times [2021-01-06 17:55:56,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:56,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389670090] [2021-01-06 17:55:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:56,269 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:56,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980511993] [2021-01-06 17:55:56,269 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 17:55:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:56,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:55:56,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:59,370 WARN L197 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-01-06 17:55:59,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:55:59,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:55:59,513 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:56:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:01,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389670090] [2021-01-06 17:56:01,567 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:01,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980511993] [2021-01-06 17:56:01,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:01,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:56:01,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974055027] [2021-01-06 17:56:01,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:56:01,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:56:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:56:01,570 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 8 states. [2021-01-06 17:56:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:06,271 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-01-06 17:56:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:56:06,277 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 17:56:06,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:06,278 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:56:06,278 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:56:06,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:56:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:56:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:56:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:56:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-01-06 17:56:06,299 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 13 [2021-01-06 17:56:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:06,299 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-01-06 17:56:06,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:56:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-01-06 17:56:06,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:56:06,301 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:06,301 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:06,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:06,518 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:06,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:06,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1092907201, now seen corresponding path program 1 times [2021-01-06 17:56:06,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:06,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833848459] [2021-01-06 17:56:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:06,539 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:06,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285432168] [2021-01-06 17:56:06,540 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 17:56:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:56:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:06,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833848459] [2021-01-06 17:56:06,628 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:06,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285432168] [2021-01-06 17:56:06,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:06,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:56:06,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644770956] [2021-01-06 17:56:06,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:56:06,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:06,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:56:06,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:56:06,630 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 5 states. [2021-01-06 17:56:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:06,673 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-01-06 17:56:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:56:06,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 17:56:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:06,675 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:56:06,675 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:56:06,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:56:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:56:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 17:56:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:56:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-01-06 17:56:06,684 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 14 [2021-01-06 17:56:06,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:06,685 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-01-06 17:56:06,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:56:06,685 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-01-06 17:56:06,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:56:06,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:06,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:06,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:06,900 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:06,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1175899963, now seen corresponding path program 1 times [2021-01-06 17:56:06,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:06,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710164048] [2021-01-06 17:56:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:06,920 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:06,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564418151] [2021-01-06 17:56:06,920 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 17:56:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:06,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:56:06,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:09,576 WARN L197 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-01-06 17:56:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:09,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710164048] [2021-01-06 17:56:09,663 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:09,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564418151] [2021-01-06 17:56:09,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:09,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:56:09,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64578091] [2021-01-06 17:56:09,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:56:09,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:09,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:56:09,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:56:09,666 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 8 states. [2021-01-06 17:56:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:12,175 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2021-01-06 17:56:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:56:12,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 17:56:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:12,177 INFO L225 Difference]: With dead ends: 53 [2021-01-06 17:56:12,177 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:56:12,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:56:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:56:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-01-06 17:56:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 17:56:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-01-06 17:56:12,186 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 14 [2021-01-06 17:56:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:12,187 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-01-06 17:56:12,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:56:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-01-06 17:56:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:56:12,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:12,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:12,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 17:56:12,400 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2112377150, now seen corresponding path program 1 times [2021-01-06 17:56:12,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:12,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334097472] [2021-01-06 17:56:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:12,416 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:12,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208843952] [2021-01-06 17:56:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:12,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:56:12,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:12,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334097472] [2021-01-06 17:56:12,644 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:12,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208843952] [2021-01-06 17:56:12,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:12,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:56:12,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090517685] [2021-01-06 17:56:12,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:56:12,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:12,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:56:12,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:56:12,647 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 7 states. [2021-01-06 17:56:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:13,138 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2021-01-06 17:56:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:56:13,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-06 17:56:13,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:13,140 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:56:13,140 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:56:13,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:56:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:56:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2021-01-06 17:56:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 17:56:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-01-06 17:56:13,158 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 15 [2021-01-06 17:56:13,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:13,158 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-01-06 17:56:13,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:56:13,158 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-01-06 17:56:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:56:13,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:13,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:13,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:13,365 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2114224192, now seen corresponding path program 1 times [2021-01-06 17:56:13,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:13,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141872439] [2021-01-06 17:56:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:13,389 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:13,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425706570] [2021-01-06 17:56:13,392 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 17:56:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:56:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:15,689 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-01-06 17:56:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:15,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141872439] [2021-01-06 17:56:15,862 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:15,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425706570] [2021-01-06 17:56:15,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:15,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:56:15,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136755264] [2021-01-06 17:56:15,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:56:15,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:15,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:56:15,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:56:15,873 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2021-01-06 17:56:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:20,665 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2021-01-06 17:56:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:56:20,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2021-01-06 17:56:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:20,666 INFO L225 Difference]: With dead ends: 73 [2021-01-06 17:56:20,666 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:56:20,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:56:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:56:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2021-01-06 17:56:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 17:56:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-01-06 17:56:20,677 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 15 [2021-01-06 17:56:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:20,678 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-01-06 17:56:20,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:56:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-01-06 17:56:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:56:20,679 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:20,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:20,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:20,894 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:20,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:20,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1951591878, now seen corresponding path program 1 times [2021-01-06 17:56:20,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:20,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92792778] [2021-01-06 17:56:20,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:20,909 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:20,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036248632] [2021-01-06 17:56:20,909 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 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 17:56:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:20,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:56:20,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:21,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92792778] [2021-01-06 17:56:21,077 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:21,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036248632] [2021-01-06 17:56:21,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:56:21,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:56:21,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280622084] [2021-01-06 17:56:21,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:56:21,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:21,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:56:21,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:56:21,080 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 6 states. [2021-01-06 17:56:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:21,317 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2021-01-06 17:56:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:56:21,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-01-06 17:56:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:21,319 INFO L225 Difference]: With dead ends: 87 [2021-01-06 17:56:21,319 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 17:56:21,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:56:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 17:56:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2021-01-06 17:56:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 17:56:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2021-01-06 17:56:21,334 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 16 [2021-01-06 17:56:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:21,335 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2021-01-06 17:56:21,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:56:21,337 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2021-01-06 17:56:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:56:21,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:21,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:21,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 17:56:21,541 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:21,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1461153292, now seen corresponding path program 2 times [2021-01-06 17:56:21,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:21,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125080900] [2021-01-06 17:56:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:21,565 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:21,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887191339] [2021-01-06 17:56:21,567 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 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 17:56:21,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:56:21,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:21,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:56:21,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:49,049 WARN L197 SmtUtils]: Spent 24.52 s on a formula simplification that was a NOOP. DAG size: 33 [2021-01-06 17:57:01,242 WARN L197 SmtUtils]: Spent 8.15 s on a formula simplification that was a NOOP. DAG size: 26 [2021-01-06 17:57:15,442 WARN L197 SmtUtils]: Spent 12.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-01-06 17:57:15,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125080900] [2021-01-06 17:57:15,467 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:15,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887191339] [2021-01-06 17:57:15,468 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:57:15,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:15,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:57:15,468 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:57:15,468 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:57:15,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:15,704 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:57:15,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:57:15 BoogieIcfgContainer [2021-01-06 17:57:15,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:57:15,705 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:57:15,705 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:57:15,705 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:57:15,706 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:55:48" (3/4) ... [2021-01-06 17:57:15,709 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:57:15,710 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:57:15,711 INFO L168 Benchmark]: Toolchain (without parser) took 87954.61 ms. Allocated memory was 159.4 MB in the beginning and 202.4 MB in the end (delta: 43.0 MB). Free memory was 134.2 MB in the beginning and 113.6 MB in the end (delta: 20.6 MB). Peak memory consumption was 65.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:15,711 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 159.4 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:57:15,712 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.93 ms. Allocated memory is still 159.4 MB. Free memory was 133.9 MB in the beginning and 123.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:15,713 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.62 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 121.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:15,713 INFO L168 Benchmark]: Boogie Preprocessor took 43.66 ms. Allocated memory is still 159.4 MB. Free memory was 121.6 MB in the beginning and 120.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:15,714 INFO L168 Benchmark]: RCFGBuilder took 412.85 ms. Allocated memory is still 159.4 MB. Free memory was 120.6 MB in the beginning and 105.1 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:15,715 INFO L168 Benchmark]: TraceAbstraction took 87149.75 ms. Allocated memory was 159.4 MB in the beginning and 202.4 MB in the end (delta: 43.0 MB). Free memory was 104.6 MB in the beginning and 114.2 MB in the end (delta: -9.6 MB). Peak memory consumption was 33.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:15,716 INFO L168 Benchmark]: Witness Printer took 4.82 ms. Allocated memory is still 202.4 MB. Free memory was 114.2 MB in the beginning and 113.6 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:15,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 159.4 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 284.93 ms. Allocated memory is still 159.4 MB. Free memory was 133.9 MB in the beginning and 123.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.62 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 121.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.66 ms. Allocated memory is still 159.4 MB. Free memory was 121.6 MB in the beginning and 120.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 412.85 ms. Allocated memory is still 159.4 MB. Free memory was 120.6 MB in the beginning and 105.1 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 87149.75 ms. Allocated memory was 159.4 MB in the beginning and 202.4 MB in the end (delta: 43.0 MB). Free memory was 104.6 MB in the beginning and 114.2 MB in the end (delta: -9.6 MB). Peak memory consumption was 33.7 MB. Max. memory is 8.0 GB. * Witness Printer took 4.82 ms. Allocated memory is still 202.4 MB. Free memory was 114.2 MB in the beginning and 113.6 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L33] EXPR counter++ [L33] COND TRUE counter++<100 [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p [L33] EXPR counter++ [L33] COND TRUE counter++<100 [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p [L33] EXPR counter++ [L33] COND TRUE counter++<100 [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 86.9s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 18.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 197 SDtfs, 641 SDslu, 416 SDs, 0 SdLazy, 565 SolverSat, 158 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 14.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 11.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 108 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 113 ConstructedInterpolants, 1 QuantifiedInterpolants, 13525 SizeOfPredicates, 66 NumberOfNonLiveVariables, 670 ConjunctsInSsa, 193 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 4/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...