/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/mannadiv_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:01:17,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:01:17,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:01:17,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:01:17,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:01:17,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:01:17,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:01:17,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:01:17,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:01:17,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:01:17,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:01:17,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:01:17,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:01:17,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:01:17,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:01:17,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:01:17,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:01:17,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:01:17,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:01:17,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:01:17,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:01:17,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:01:17,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:01:17,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:01:17,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:01:17,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:01:17,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:01:17,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:01:17,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 08:01:17,848 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:01:17,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:01:17,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:01:17,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:01:17,853 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:01:17,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:01:17,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:01:17,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:01:17,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:01:17,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:01:17,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:01:17,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:01:17,854 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:01:17,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:01:17,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:01:17,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:01:17,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:01:17,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:01:17,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:01:17,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:01:17,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:01:17,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:01:17,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:01:17,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:01:17,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:01:17,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:01:18,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:01:18,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:01:18,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:01:18,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:01:18,270 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:01:18,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2020-12-23 08:01:18,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/58b779c7e/5cacecb1e33f4ef9957814c46673bb4a/FLAGb2cff77f7 [2020-12-23 08:01:18,939 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:01:18,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2020-12-23 08:01:18,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/58b779c7e/5cacecb1e33f4ef9957814c46673bb4a/FLAGb2cff77f7 [2020-12-23 08:01:19,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/58b779c7e/5cacecb1e33f4ef9957814c46673bb4a [2020-12-23 08:01:19,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:01:19,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:01:19,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:01:19,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:01:19,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:01:19,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e1fbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19, skipping insertion in model container [2020-12-23 08:01:19,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:01:19,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:01:19,503 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/mannadiv_unwindbound5.c[573,586] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] left hand side expression in assignment: lhs: VariableLHS[~x2~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] [2020-12-23 08:01:19,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:01:19,548 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:01:19,566 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/mannadiv_unwindbound5.c[573,586] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] left hand side expression in assignment: lhs: VariableLHS[~x2~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] [2020-12-23 08:01:19,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:01:19,615 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:01:19,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19 WrapperNode [2020-12-23 08:01:19,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:01:19,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:01:19,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:01:19,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:01:19,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:01:19,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:01:19,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:01:19,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:01:19,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:01:19,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:01:19,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:01:19,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:01:19,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:01:19,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:01:19,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:01:19,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:01:19,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:01:20,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:01:20,146 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 08:01:20,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:20 BoogieIcfgContainer [2020-12-23 08:01:20,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:01:20,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:01:20,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:01:20,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:01:20,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:01:19" (1/3) ... [2020-12-23 08:01:20,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a39acb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:01:20, skipping insertion in model container [2020-12-23 08:01:20,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (2/3) ... [2020-12-23 08:01:20,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a39acb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:01:20, skipping insertion in model container [2020-12-23 08:01:20,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:20" (3/3) ... [2020-12-23 08:01:20,159 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2020-12-23 08:01:20,166 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:01:20,171 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 08:01:20,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 08:01:20,300 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:01:20,301 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:01:20,301 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:01:20,301 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:01:20,301 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:01:20,301 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:01:20,301 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:01:20,302 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:01:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 08:01:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 08:01:20,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:20,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:20,325 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:20,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2020-12-23 08:01:20,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:20,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056149914] [2020-12-23 08:01:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:20,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056149914] [2020-12-23 08:01:20,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:20,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:01:20,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144255800] [2020-12-23 08:01:20,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:01:20,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:20,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:01:20,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:01:20,572 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 08:01:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:20,595 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-23 08:01:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:01:20,597 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 08:01:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:20,618 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:01:20,619 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 08:01:20,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:01:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 08:01:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 08:01:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 08:01:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 08:01:20,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-23 08:01:20,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:20,673 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 08:01:20,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:01:20,673 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 08:01:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 08:01:20,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:20,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:20,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:01:20,676 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:20,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:20,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-12-23 08:01:20,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:20,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064957846] [2020-12-23 08:01:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:20,742 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:20,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773682711] [2020-12-23 08:01:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:20,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 08:01:20,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:21,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064957846] [2020-12-23 08:01:21,031 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:21,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773682711] [2020-12-23 08:01:21,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:21,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 08:01:21,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458019428] [2020-12-23 08:01:21,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:01:21,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:21,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:01:21,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:21,036 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2020-12-23 08:01:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:21,299 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-23 08:01:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:01:21,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-23 08:01:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:21,301 INFO L225 Difference]: With dead ends: 32 [2020-12-23 08:01:21,301 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 08:01:21,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-12-23 08:01:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 08:01:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-23 08:01:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:01:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-23 08:01:21,309 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2020-12-23 08:01:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:21,310 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-23 08:01:21,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:01:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-23 08:01:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 08:01:21,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:21,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:21,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:01:21,525 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2020-12-23 08:01:21,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:21,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414196600] [2020-12-23 08:01:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:21,545 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:21,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296807438] [2020-12-23 08:01:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:21,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 08:01:21,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:21,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414196600] [2020-12-23 08:01:21,650 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:21,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296807438] [2020-12-23 08:01:21,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:21,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 08:01:21,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193758757] [2020-12-23 08:01:21,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 08:01:21,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:21,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 08:01:21,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:01:21,656 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-23 08:01:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:21,681 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 08:01:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 08:01:21,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 08:01:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:21,683 INFO L225 Difference]: With dead ends: 24 [2020-12-23 08:01:21,683 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 08:01:21,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:01:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 08:01:21,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 08:01:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:01:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 08:01:21,695 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-12-23 08:01:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:21,696 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 08:01:21,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 08:01:21,696 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 08:01:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 08:01:21,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:21,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:21,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:21,912 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:21,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2020-12-23 08:01:21,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:21,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949133845] [2020-12-23 08:01:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:21,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:21,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979154838] [2020-12-23 08:01:21,936 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 [2020-12-23 08:01:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:22,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:01:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:22,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949133845] [2020-12-23 08:01:22,166 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:22,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979154838] [2020-12-23 08:01:22,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:22,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 08:01:22,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262416238] [2020-12-23 08:01:22,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 08:01:22,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:22,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 08:01:22,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:01:22,169 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-12-23 08:01:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:22,342 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-23 08:01:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:01:22,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-23 08:01:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:22,344 INFO L225 Difference]: With dead ends: 24 [2020-12-23 08:01:22,344 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 08:01:22,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:01:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 08:01:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 08:01:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 08:01:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 08:01:22,349 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-12-23 08:01:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:22,349 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 08:01:22,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 08:01:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 08:01:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:01:22,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:22,351 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:22,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:22,564 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:22,566 INFO L82 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2020-12-23 08:01:22,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:22,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34346259] [2020-12-23 08:01:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:22,586 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:22,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037149905] [2020-12-23 08:01:22,588 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 [2020-12-23 08:01:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 08:01:22,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:22,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34346259] [2020-12-23 08:01:22,705 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:22,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037149905] [2020-12-23 08:01:22,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:22,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 08:01:22,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947452607] [2020-12-23 08:01:22,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:01:22,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:22,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:01:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:01:22,709 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-12-23 08:01:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:22,743 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-23 08:01:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:01:22,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 08:01:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:22,746 INFO L225 Difference]: With dead ends: 26 [2020-12-23 08:01:22,746 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 08:01:22,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:01:22,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 08:01:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 08:01:22,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 08:01:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 08:01:22,758 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-12-23 08:01:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:22,759 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 08:01:22,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:01:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 08:01:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 08:01:22,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:22,761 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:22,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:22,976 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 2 times [2020-12-23 08:01:22,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:22,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878081831] [2020-12-23 08:01:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:23,000 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:23,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96571793] [2020-12-23 08:01:23,001 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 [2020-12-23 08:01:23,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:23,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:23,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 08:01:23,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:23,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878081831] [2020-12-23 08:01:23,113 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:23,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96571793] [2020-12-23 08:01:23,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:23,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 08:01:23,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701969239] [2020-12-23 08:01:23,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:01:23,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:23,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:01:23,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:01:23,116 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-12-23 08:01:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:23,155 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-23 08:01:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:01:23,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 08:01:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:23,157 INFO L225 Difference]: With dead ends: 31 [2020-12-23 08:01:23,157 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 08:01:23,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 08:01:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 08:01:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 08:01:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 08:01:23,164 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-12-23 08:01:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:23,165 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 08:01:23,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:01:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 08:01:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 08:01:23,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:23,166 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:23,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 08:01:23,382 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:23,382 INFO L82 PathProgramCache]: Analyzing trace with hash 256826265, now seen corresponding path program 3 times [2020-12-23 08:01:23,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:23,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93229678] [2020-12-23 08:01:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:23,402 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:23,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056759530] [2020-12-23 08:01:23,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:23,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 08:01:23,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:23,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 08:01:23,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:23,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93229678] [2020-12-23 08:01:23,547 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:23,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056759530] [2020-12-23 08:01:23,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:23,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:01:23,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761324806] [2020-12-23 08:01:23,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:01:23,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:23,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:01:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:01:23,550 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-12-23 08:01:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:23,602 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-23 08:01:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:01:23,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-23 08:01:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:23,603 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:01:23,603 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 08:01:23,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:01:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 08:01:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 08:01:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:01:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 08:01:23,611 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2020-12-23 08:01:23,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:23,611 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 08:01:23,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:01:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 08:01:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 08:01:23,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:23,613 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:23,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:23,827 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:23,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1955278293, now seen corresponding path program 4 times [2020-12-23 08:01:23,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:23,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219209204] [2020-12-23 08:01:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:23,846 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:23,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060206557] [2020-12-23 08:01:23,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:23,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:01:23,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:23,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 08:01:23,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:24,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219209204] [2020-12-23 08:01:24,016 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:24,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060206557] [2020-12-23 08:01:24,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:24,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:01:24,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327770074] [2020-12-23 08:01:24,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:01:24,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:24,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:01:24,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:24,018 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-12-23 08:01:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:24,081 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-23 08:01:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 08:01:24,082 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-23 08:01:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:24,083 INFO L225 Difference]: With dead ends: 41 [2020-12-23 08:01:24,083 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 08:01:24,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:01:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 08:01:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 08:01:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 08:01:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-23 08:01:24,091 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2020-12-23 08:01:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:24,091 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-23 08:01:24,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:01:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-23 08:01:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 08:01:24,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:24,092 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:24,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:24,307 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:24,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 5 times [2020-12-23 08:01:24,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:24,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334086236] [2020-12-23 08:01:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:24,324 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:24,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289391638] [2020-12-23 08:01:24,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:24,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 08:01:24,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-23 08:01:24,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 08:01:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 08:01:24,436 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 08:01:24,540 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 08:01:24,540 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 08:01:24,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 08:01:24,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 08:01:24 BoogieIcfgContainer [2020-12-23 08:01:24,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 08:01:24,815 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 08:01:24,815 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 08:01:24,815 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 08:01:24,816 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:20" (3/4) ... [2020-12-23 08:01:24,818 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 08:01:24,898 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/mannadiv_unwindbound5.c-witness.graphml [2020-12-23 08:01:24,898 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 08:01:24,901 INFO L168 Benchmark]: Toolchain (without parser) took 5576.40 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 140.9 MB in the beginning and 125.7 MB in the end (delta: 15.1 MB). Peak memory consumption was 49.6 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:24,901 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 164.6 MB. Free memory is still 139.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:01:24,902 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.86 ms. Allocated memory is still 164.6 MB. Free memory was 140.6 MB in the beginning and 130.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:24,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.76 ms. Allocated memory is still 164.6 MB. Free memory was 130.8 MB in the beginning and 129.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:24,903 INFO L168 Benchmark]: Boogie Preprocessor took 54.97 ms. Allocated memory is still 164.6 MB. Free memory was 129.3 MB in the beginning and 128.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:24,904 INFO L168 Benchmark]: RCFGBuilder took 411.17 ms. Allocated memory is still 164.6 MB. Free memory was 128.3 MB in the beginning and 114.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:24,905 INFO L168 Benchmark]: TraceAbstraction took 4664.72 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 114.4 MB in the beginning and 129.4 MB in the end (delta: -15.0 MB). Peak memory consumption was 19.2 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:24,905 INFO L168 Benchmark]: Witness Printer took 83.54 ms. Allocated memory is still 198.2 MB. Free memory was 129.4 MB in the beginning and 125.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:24,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 164.6 MB. Free memory is still 139.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.86 ms. Allocated memory is still 164.6 MB. Free memory was 140.6 MB in the beginning and 130.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 61.76 ms. Allocated memory is still 164.6 MB. Free memory was 130.8 MB in the beginning and 129.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.97 ms. Allocated memory is still 164.6 MB. Free memory was 129.3 MB in the beginning and 128.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 411.17 ms. Allocated memory is still 164.6 MB. Free memory was 128.3 MB in the beginning and 114.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4664.72 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 114.4 MB in the beginning and 129.4 MB in the end (delta: -15.0 MB). Peak memory consumption was 19.2 MB. Max. memory is 8.0 GB. * Witness Printer took 83.54 ms. Allocated memory is still 198.2 MB. Free memory was 129.4 MB in the beginning and 125.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND FALSE !(counter++<5) [L16] COND TRUE !(cond) VAL [counter=6] [L18] reach_error() VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.4s, OverallIterations: 9, TraceHistogramMax: 6, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 116 SDtfs, 149 SDslu, 226 SDs, 0 SdLazy, 140 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=8, 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, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 8220 SizeOfPredicates, 30 NumberOfNonLiveVariables, 680 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 0/70 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 proved your program to be incorrect! Received shutdown request...