/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/prodbin-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:57:07,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:57:07,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:57:07,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:57:07,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:57:07,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:57:07,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:57:07,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:57:07,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:57:07,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:57:07,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:57:07,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:57:07,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:57:07,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:57:07,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:57:07,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:57:07,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:57:07,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:57:07,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:57:07,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:57:07,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:57:07,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:57:07,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:57:07,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:57:07,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:57:07,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:57:07,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:57:07,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:57:07,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:57:07,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:57:07,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:57:07,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:57:07,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:57:07,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:57:07,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:57:07,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:57:07,835 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 17:57:07,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:57:07,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:57:07,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:57:07,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:57:07,893 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:57:07,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:57:07,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:57:07,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:57:07,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:57:07,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:57:07,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:57:07,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:57:07,896 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:57:07,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:57:07,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:57:07,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:57:07,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:57:07,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:57:07,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:57:07,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:57:07,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:57:07,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:57:07,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:57:07,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:57:07,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:57:07,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:57:08,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:57:08,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:57:08,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:57:08,331 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:57:08,332 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:57:08,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-01-06 17:57:08,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f824e3c5d/6171a2557a604d6283cfccb1581e4067/FLAGb5d656b9c [2021-01-06 17:57:08,948 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:57:08,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-01-06 17:57:08,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f824e3c5d/6171a2557a604d6283cfccb1581e4067/FLAGb5d656b9c [2021-01-06 17:57:09,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f824e3c5d/6171a2557a604d6283cfccb1581e4067 [2021-01-06 17:57:09,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:57:09,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:57:09,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:57:09,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:57:09,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:57:09,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d483fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09, skipping insertion in model container [2021-01-06 17:57:09,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:57:09,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:57:09,582 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/prodbin-ll_unwindbound1.c[537,550] 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[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 17:57:09,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:57:09,612 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:57:09,627 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/prodbin-ll_unwindbound1.c[537,550] 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[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 17:57:09,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:57:09,652 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:57:09,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09 WrapperNode [2021-01-06 17:57:09,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:57:09,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:57:09,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:57:09,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:57:09,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:57:09,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:57:09,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:57:09,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:57:09,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (1/1) ... [2021-01-06 17:57:09,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:57:09,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:57:09,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:57:09,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:57:09,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (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 17:57:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:57:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:57:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:57:09,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:57:10,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:57:10,123 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 17:57:10,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:10 BoogieIcfgContainer [2021-01-06 17:57:10,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:57:10,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:57:10,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:57:10,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:57:10,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:57:09" (1/3) ... [2021-01-06 17:57:10,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fddc807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:57:10, skipping insertion in model container [2021-01-06 17:57:10,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:09" (2/3) ... [2021-01-06 17:57:10,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fddc807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:57:10, skipping insertion in model container [2021-01-06 17:57:10,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:10" (3/3) ... [2021-01-06 17:57:10,135 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.c [2021-01-06 17:57:10,143 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:57:10,148 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:57:10,172 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:57:10,204 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:57:10,204 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:57:10,205 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:57:10,205 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:57:10,205 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:57:10,205 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:57:10,205 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:57:10,206 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:57:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 17:57:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:57:10,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:10,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:10,260 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:10,273 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2021-01-06 17:57:10,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:10,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565738640] [2021-01-06 17:57:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:10,469 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 17:57:10,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565738640] [2021-01-06 17:57:10,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:10,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:57:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675691555] [2021-01-06 17:57:10,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:57:10,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:10,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:57:10,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:57:10,496 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 17:57:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:10,514 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-01-06 17:57:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:57:10,516 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 17:57:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:10,525 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:57:10,525 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:57:10,528 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 17:57:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:57:10,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:57:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:57:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 17:57:10,566 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-01-06 17:57:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:10,566 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 17:57:10,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:57:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 17:57:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:57:10,567 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:10,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:10,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:57:10,568 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:10,569 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-01-06 17:57:10,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:10,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940413204] [2021-01-06 17:57:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:10,589 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:10,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574070527] [2021-01-06 17:57:10,590 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 17:57:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:10,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:57:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:10,910 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 17:57:10,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940413204] [2021-01-06 17:57:10,911 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:10,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574070527] [2021-01-06 17:57:10,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:10,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:57:10,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711769549] [2021-01-06 17:57:10,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:57:10,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:10,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:57:10,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:57:10,916 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2021-01-06 17:57:11,137 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-01-06 17:57:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:11,258 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-01-06 17:57:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:57:11,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 17:57:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:11,261 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:57:11,261 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:57:11,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:57:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:57:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-01-06 17:57:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:57:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 17:57:11,270 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2021-01-06 17:57:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:11,270 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 17:57:11,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:57:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 17:57:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:57:11,271 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:11,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:11,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:57:11,485 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:11,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2021-01-06 17:57:11,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:11,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259643852] [2021-01-06 17:57:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:11,577 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 17:57:11,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259643852] [2021-01-06 17:57:11,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:11,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:57:11,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576181458] [2021-01-06 17:57:11,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:57:11,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:57:11,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:57:11,580 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2021-01-06 17:57:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:11,602 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 17:57:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:57:11,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 17:57:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:11,604 INFO L225 Difference]: With dead ends: 24 [2021-01-06 17:57:11,604 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:57:11,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:57:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:57:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 17:57:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:57:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 17:57:11,611 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2021-01-06 17:57:11,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:11,611 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 17:57:11,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:57:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 17:57:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:57:11,612 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:11,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:11,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:57:11,613 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2021-01-06 17:57:11,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:11,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660477333] [2021-01-06 17:57:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:11,630 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:11,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639610110] [2021-01-06 17:57:11,631 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 17:57:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:11,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:57:11,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:11,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660477333] [2021-01-06 17:57:11,799 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:11,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639610110] [2021-01-06 17:57:11,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:11,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:57:11,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145433086] [2021-01-06 17:57:11,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:57:11,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:11,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:57:11,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:57:11,807 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2021-01-06 17:57:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:11,860 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-01-06 17:57:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:57:11,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 17:57:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:11,862 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:57:11,862 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:57:11,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:57:11,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:57:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:57:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:57:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-01-06 17:57:11,868 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-01-06 17:57:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:11,868 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-01-06 17:57:11,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:57:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-01-06 17:57:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:57:11,869 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:11,870 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:12,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:12,086 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:12,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:12,088 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2021-01-06 17:57:12,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:12,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549703095] [2021-01-06 17:57:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:12,105 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:12,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584800205] [2021-01-06 17:57:12,106 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 17:57:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 17:57:12,198 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:57:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 17:57:12,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:57:12,266 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 17:57:12,267 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:57:12,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:12,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:57:12 BoogieIcfgContainer [2021-01-06 17:57:12,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:57:12,544 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:57:12,545 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:57:12,545 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:57:12,546 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:10" (3/4) ... [2021-01-06 17:57:12,548 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 17:57:12,628 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c-witness.graphml [2021-01-06 17:57:12,628 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:57:12,630 INFO L168 Benchmark]: Toolchain (without parser) took 3298.11 ms. Allocated memory was 159.4 MB in the beginning and 208.7 MB in the end (delta: 49.3 MB). Free memory was 135.6 MB in the beginning and 191.7 MB in the end (delta: -56.2 MB). Peak memory consumption was 84.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:12,631 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 159.4 MB. Free memory is still 131.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:57:12,631 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.25 ms. Allocated memory is still 159.4 MB. Free memory was 135.4 MB in the beginning and 125.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:12,632 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.31 ms. Allocated memory is still 159.4 MB. Free memory was 125.4 MB in the beginning and 123.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:12,633 INFO L168 Benchmark]: Boogie Preprocessor took 25.64 ms. Allocated memory is still 159.4 MB. Free memory was 123.9 MB in the beginning and 122.9 MB in the end (delta: 987.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:12,633 INFO L168 Benchmark]: RCFGBuilder took 403.08 ms. Allocated memory is still 159.4 MB. Free memory was 122.9 MB in the beginning and 109.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:12,634 INFO L168 Benchmark]: TraceAbstraction took 2416.83 ms. Allocated memory is still 159.4 MB. Free memory was 109.6 MB in the beginning and 54.8 MB in the end (delta: 54.8 MB). Peak memory consumption was 54.9 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:12,635 INFO L168 Benchmark]: Witness Printer took 84.16 ms. Allocated memory was 159.4 MB in the beginning and 208.7 MB in the end (delta: 49.3 MB). Free memory was 54.8 MB in the beginning and 191.7 MB in the end (delta: -137.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:12,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 159.4 MB. Free memory is still 131.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 316.25 ms. Allocated memory is still 159.4 MB. Free memory was 135.4 MB in the beginning and 125.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.31 ms. Allocated memory is still 159.4 MB. Free memory was 125.4 MB in the beginning and 123.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.64 ms. Allocated memory is still 159.4 MB. Free memory was 123.9 MB in the beginning and 122.9 MB in the end (delta: 987.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 403.08 ms. Allocated memory is still 159.4 MB. Free memory was 122.9 MB in the beginning and 109.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2416.83 ms. Allocated memory is still 159.4 MB. Free memory was 109.6 MB in the beginning and 54.8 MB in the end (delta: 54.8 MB). Peak memory consumption was 54.9 MB. Max. memory is 8.0 GB. * Witness Printer took 84.16 ms. Allocated memory was 159.4 MB in the beginning and 208.7 MB in the end (delta: 49.3 MB). Free memory was 54.8 MB in the beginning and 191.7 MB in the end (delta: -137.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) VAL [counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<1 [L13] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(y != 0)) VAL [counter=1] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [counter=1] [L42] x = 2 * x [L43] y = y / 2 VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND FALSE !(counter++<1) [L13] COND TRUE !(cond) VAL [counter=2] [L15] reach_error() VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 78 SDslu, 60 SDs, 0 SdLazy, 45 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, 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, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 991 SizeOfPredicates, 9 NumberOfNonLiveVariables, 149 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/3 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...