/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/divbin_valuebound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:28:43,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:28:43,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:28:44,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:28:44,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:28:44,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:28:44,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:28:44,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:28:44,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:28:44,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:28:44,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:28:44,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:28:44,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:28:44,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:28:44,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:28:44,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:28:44,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:28:44,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:28:44,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:28:44,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:28:44,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:28:44,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:28:44,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:28:44,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:28:44,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:28:44,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:28:44,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:28:44,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:28:44,124 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 17:28:44,202 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:28:44,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:28:44,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:28:44,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:28:44,209 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:28:44,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:28:44,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:28:44,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:28:44,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:28:44,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:28:44,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:28:44,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:28:44,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:28:44,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:28:44,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:28:44,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:28:44,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:28:44,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:28:44,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:28:44,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:28:44,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:28:44,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:28:44,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:28:44,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:28:44,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:28:44,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:28:44,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:28:44,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:28:44,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:28:44,711 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:28:44,712 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:28:44,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2021-01-06 17:28:44,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/412d17d69/783c5857b4ae4793ac5964ccf1b05e33/FLAGda3bdc0e3 [2021-01-06 17:28:45,438 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:28:45,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2021-01-06 17:28:45,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/412d17d69/783c5857b4ae4793ac5964ccf1b05e33/FLAGda3bdc0e3 [2021-01-06 17:28:45,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/412d17d69/783c5857b4ae4793ac5964ccf1b05e33 [2021-01-06 17:28:45,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:28:45,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:28:45,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:28:45,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:28:45,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:28:45,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:28:45" (1/1) ... [2021-01-06 17:28:45,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b546c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:45, skipping insertion in model container [2021-01-06 17:28:45,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:28:45" (1/1) ... [2021-01-06 17:28:45,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:28:45,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:28:46,023 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/divbin_valuebound10.i[950,963] 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,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~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[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:28:46,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:28:46,056 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:28:46,072 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/divbin_valuebound10.i[950,963] 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,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~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[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:28:46,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:28:46,102 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:28:46,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46 WrapperNode [2021-01-06 17:28:46,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:28:46,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:28:46,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:28:46,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:28:46,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (1/1) ... [2021-01-06 17:28:46,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (1/1) ... [2021-01-06 17:28:46,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:28:46,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:28:46,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:28:46,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:28:46,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (1/1) ... [2021-01-06 17:28:46,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (1/1) ... [2021-01-06 17:28:46,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (1/1) ... [2021-01-06 17:28:46,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (1/1) ... [2021-01-06 17:28:46,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (1/1) ... [2021-01-06 17:28:46,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (1/1) ... [2021-01-06 17:28:46,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (1/1) ... [2021-01-06 17:28:46,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:28:46,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:28:46,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:28:46,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:28:46,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (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 17:28:46,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:28:46,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:28:46,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:28:46,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:28:46,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:28:46,786 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-01-06 17:28:46,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:28:46 BoogieIcfgContainer [2021-01-06 17:28:46,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:28:46,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:28:46,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:28:46,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:28:46,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:28:45" (1/3) ... [2021-01-06 17:28:46,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c79db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:28:46, skipping insertion in model container [2021-01-06 17:28:46,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:46" (2/3) ... [2021-01-06 17:28:46,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c79db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:28:46, skipping insertion in model container [2021-01-06 17:28:46,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:28:46" (3/3) ... [2021-01-06 17:28:46,828 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound10.i [2021-01-06 17:28:46,836 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:28:46,841 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:28:46,862 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:28:46,909 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:28:46,909 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:28:46,909 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:28:46,909 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:28:46,910 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:28:46,910 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:28:46,910 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:28:46,910 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:28:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2021-01-06 17:28:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:28:46,932 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:46,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:46,933 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:46,940 INFO L82 PathProgramCache]: Analyzing trace with hash -174569337, now seen corresponding path program 1 times [2021-01-06 17:28:46,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:46,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994743392] [2021-01-06 17:28:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:47,119 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 17:28:47,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994743392] [2021-01-06 17:28:47,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:47,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:28:47,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086889828] [2021-01-06 17:28:47,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:28:47,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:47,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:28:47,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:28:47,147 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2021-01-06 17:28:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:47,168 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2021-01-06 17:28:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:28:47,170 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2021-01-06 17:28:47,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:47,180 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:28:47,180 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 17:28:47,183 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 17:28:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 17:28:47,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 17:28:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:28:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 17:28:47,224 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2021-01-06 17:28:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:47,225 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 17:28:47,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:28:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 17:28:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:28:47,226 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:47,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:47,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:28:47,227 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:47,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1454099019, now seen corresponding path program 1 times [2021-01-06 17:28:47,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:47,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301959808] [2021-01-06 17:28:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:47,255 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:47,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538745538] [2021-01-06 17:28:47,256 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 17:28:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:28:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:47,744 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 17:28:47,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301959808] [2021-01-06 17:28:47,745 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:47,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538745538] [2021-01-06 17:28:47,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:47,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 17:28:47,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210359672] [2021-01-06 17:28:47,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:28:47,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:47,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:28:47,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:28:47,755 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2021-01-06 17:28:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:48,370 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-01-06 17:28:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:28:48,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-01-06 17:28:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:48,372 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:28:48,372 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:28:48,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:28:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:28:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-01-06 17:28:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:28:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 17:28:48,381 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2021-01-06 17:28:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:48,382 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 17:28:48,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:28:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 17:28:48,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:28:48,383 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:48,383 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:48,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:28:48,597 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1566788422, now seen corresponding path program 1 times [2021-01-06 17:28:48,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:48,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362010111] [2021-01-06 17:28:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:48,625 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:48,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512302513] [2021-01-06 17:28:48,626 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 17:28:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:48,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:28:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:48,985 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 17:28:48,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362010111] [2021-01-06 17:28:48,986 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:48,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512302513] [2021-01-06 17:28:48,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:28:48,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:28:48,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468900324] [2021-01-06 17:28:48,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:28:48,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:48,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:28:48,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:28:48,989 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 9 states. [2021-01-06 17:28:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:49,857 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-01-06 17:28:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:28:49,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2021-01-06 17:28:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:49,859 INFO L225 Difference]: With dead ends: 45 [2021-01-06 17:28:49,859 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:28:49,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:28:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:28:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-01-06 17:28:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 17:28:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-01-06 17:28:49,866 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2021-01-06 17:28:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:49,866 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-01-06 17:28:49,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:28:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-01-06 17:28:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:28:49,867 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:49,867 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:50,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:50,082 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:50,084 INFO L82 PathProgramCache]: Analyzing trace with hash 890165184, now seen corresponding path program 1 times [2021-01-06 17:28:50,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:50,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537601317] [2021-01-06 17:28:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:50,102 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:50,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665581084] [2021-01-06 17:28:50,103 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 17:28:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:50,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:28:50,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:50,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537601317] [2021-01-06 17:28:50,183 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:50,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665581084] [2021-01-06 17:28:50,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:50,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:28:50,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989884359] [2021-01-06 17:28:50,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:28:50,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:28:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:28:50,186 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 3 states. [2021-01-06 17:28:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:50,217 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-01-06 17:28:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:28:50,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 17:28:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:50,219 INFO L225 Difference]: With dead ends: 45 [2021-01-06 17:28:50,219 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:28:50,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 17:28:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:28:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 17:28:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:28:50,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-01-06 17:28:50,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2021-01-06 17:28:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:50,226 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-01-06 17:28:50,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:28:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-01-06 17:28:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:28:50,227 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:50,227 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:50,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:50,442 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:50,443 INFO L82 PathProgramCache]: Analyzing trace with hash 567763771, now seen corresponding path program 1 times [2021-01-06 17:28:50,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:50,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100918819] [2021-01-06 17:28:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:50,464 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:50,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189602787] [2021-01-06 17:28:50,465 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 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 17:28:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:50,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:28:50,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:50,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100918819] [2021-01-06 17:28:50,827 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:50,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189602787] [2021-01-06 17:28:50,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:28:50,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:28:50,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750619034] [2021-01-06 17:28:50,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:28:50,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:50,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:28:50,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:28:50,831 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 10 states. [2021-01-06 17:28:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:51,505 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-01-06 17:28:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:28:51,505 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2021-01-06 17:28:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:51,509 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:28:51,509 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:28:51,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:28:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:28:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-01-06 17:28:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:28:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-01-06 17:28:51,520 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2021-01-06 17:28:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:51,520 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-01-06 17:28:51,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:28:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-01-06 17:28:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:28:51,521 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:51,522 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:51,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:51,728 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash -572229456, now seen corresponding path program 2 times [2021-01-06 17:28:51,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:51,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91339397] [2021-01-06 17:28:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:51,770 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:51,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97314458] [2021-01-06 17:28:51,771 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 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 17:28:52,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:28:52,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:28:52,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:28:52,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:53,933 WARN L197 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 26 [2021-01-06 17:28:54,066 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:28:54,438 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:29:22,853 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-01-06 17:29:22,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91339397] [2021-01-06 17:29:22,855 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:29:22,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97314458] [2021-01-06 17:29:22,856 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2021-01-06 17:29:22,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:29:22,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:29:22,857 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:29:22,857 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:29:23,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:29:23,086 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:29:23,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:29:23 BoogieIcfgContainer [2021-01-06 17:29:23,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:29:23,087 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:29:23,087 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:29:23,087 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:29:23,088 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:28:46" (3/4) ... [2021-01-06 17:29:23,092 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:29:23,092 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:29:23,094 INFO L168 Benchmark]: Toolchain (without parser) took 37296.24 ms. Allocated memory was 151.0 MB in the beginning and 760.2 MB in the end (delta: 609.2 MB). Free memory was 126.7 MB in the beginning and 571.8 MB in the end (delta: -445.1 MB). Peak memory consumption was 163.9 MB. Max. memory is 8.0 GB. [2021-01-06 17:29:23,096 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 126.4 MB in the end (delta: 82.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:29:23,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.82 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:29:23,098 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.31 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:29:23,099 INFO L168 Benchmark]: Boogie Preprocessor took 59.03 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:29:23,106 INFO L168 Benchmark]: RCFGBuilder took 581.26 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 133.0 MB in the end (delta: -19.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-01-06 17:29:23,110 INFO L168 Benchmark]: TraceAbstraction took 36274.80 ms. Allocated memory was 151.0 MB in the beginning and 760.2 MB in the end (delta: 609.2 MB). Free memory was 132.6 MB in the beginning and 572.4 MB in the end (delta: -439.8 MB). Peak memory consumption was 590.9 MB. Max. memory is 8.0 GB. [2021-01-06 17:29:23,116 INFO L168 Benchmark]: Witness Printer took 4.99 ms. Allocated memory is still 760.2 MB. Free memory was 572.4 MB in the beginning and 571.8 MB in the end (delta: 539.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:29:23,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 126.4 MB in the end (delta: 82.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 301.82 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 57.31 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.03 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 581.26 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 133.0 MB in the end (delta: -19.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 36274.80 ms. Allocated memory was 151.0 MB in the beginning and 760.2 MB in the end (delta: 609.2 MB). Free memory was 132.6 MB in the beginning and 572.4 MB in the end (delta: -439.8 MB). Peak memory consumption was 590.9 MB. Max. memory is 8.0 GB. * Witness Printer took 4.99 ms. Allocated memory is still 760.2 MB. Free memory was 572.4 MB in the beginning and 571.8 MB in the end (delta: 539.0 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: 21]: 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: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L30] B = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L34] q = 0 [L35] r = A [L36] b = B [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND TRUE !(r >= b) [L41] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L43] COND FALSE !(!(b != B)) [L44] q = 2 * q [L45] b = b / 2 [L46] COND TRUE r >= b [L47] q = q + 1 [L48] r = r - b [L41] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L43] COND FALSE !(!(b != B)) [L44] q = 2 * q [L45] b = b / 2 [L46] COND TRUE r >= b [L47] q = q + 1 [L48] r = r - b [L41] COND TRUE 1 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 36.1s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 225 SDslu, 131 SDs, 0 SdLazy, 254 SolverSat, 79 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 11533 SizeOfPredicates, 30 NumberOfNonLiveVariables, 294 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 2/8 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...