/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/ps3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:40:15,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:40:15,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:40:15,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:40:15,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:40:15,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:40:15,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:40:15,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:40:15,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:40:15,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:40:15,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:40:15,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:40:15,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:40:15,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:40:15,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:40:15,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:40:15,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:40:15,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:40:15,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:40:15,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:40:15,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:40:15,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:40:15,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:40:15,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:40:15,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:40:15,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:40:15,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:40:15,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:40:15,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:40:15,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:40:15,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:40:15,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:40:15,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:40:15,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:40:15,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:40:15,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:40:15,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:40:15,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:40:15,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:40:15,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:40:15,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:40:15,175 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:40:15,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:40:15,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:40:15,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:40:15,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:40:15,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:40:15,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:40:15,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:40:15,178 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:40:15,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:40:15,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:40:15,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:40:15,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:40:15,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:40:15,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:40:15,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:40:15,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:40:15,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:40:15,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:40:15,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:40:15,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:40:15,181 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:40:15,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:40:15,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:40:15,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:40:15,631 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:40:15,632 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:40:15,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound50.c [2020-12-22 05:40:15,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c657c93b/3b8dc6ee6b2f4f2a8f72b5192bd6b57f/FLAG2d5ce5ce9 [2020-12-22 05:40:16,217 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:40:16,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound50.c [2020-12-22 05:40:16,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c657c93b/3b8dc6ee6b2f4f2a8f72b5192bd6b57f/FLAG2d5ce5ce9 [2020-12-22 05:40:16,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c657c93b/3b8dc6ee6b2f4f2a8f72b5192bd6b57f [2020-12-22 05:40:16,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:40:16,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:40:16,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:40:16,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:40:16,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:40:16,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39b854b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16, skipping insertion in model container [2020-12-22 05:40:16,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:40:16,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:40:16,838 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound50.c[458,471] [2020-12-22 05:40:16,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:40:16,865 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:40:16,879 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound50.c[458,471] [2020-12-22 05:40:16,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:40:16,905 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:40:16,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16 WrapperNode [2020-12-22 05:40:16,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:40:16,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:40:16,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:40:16,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:40:16,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:40:16,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:40:16,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:40:16,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:40:16,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (1/1) ... [2020-12-22 05:40:16,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:40:16,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:40:16,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:40:16,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:40:16,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:40:17,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:40:17,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:40:17,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:40:17,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:40:17,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:40:17,370 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 05:40:17,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:17 BoogieIcfgContainer [2020-12-22 05:40:17,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:40:17,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:40:17,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:40:17,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:40:17,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:40:16" (1/3) ... [2020-12-22 05:40:17,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287af07a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:40:17, skipping insertion in model container [2020-12-22 05:40:17,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:16" (2/3) ... [2020-12-22 05:40:17,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287af07a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:40:17, skipping insertion in model container [2020-12-22 05:40:17,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:17" (3/3) ... [2020-12-22 05:40:17,382 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_unwindbound50.c [2020-12-22 05:40:17,391 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:40:17,396 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:40:17,417 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:40:17,445 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:40:17,445 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:40:17,446 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:40:17,446 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:40:17,446 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:40:17,446 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:40:17,446 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:40:17,446 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:40:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-22 05:40:17,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 05:40:17,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:17,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 05:40:17,469 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-22 05:40:17,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:17,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479107599] [2020-12-22 05:40:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:17,652 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:17,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191699336] [2020-12-22 05:40:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:40:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 05:40:17,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:17,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479107599] [2020-12-22 05:40:17,941 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:17,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191699336] [2020-12-22 05:40:17,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:40:17,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:40:17,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161803507] [2020-12-22 05:40:17,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:40:17,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:17,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:40:17,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:40:17,966 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-12-22 05:40:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:18,032 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-12-22 05:40:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:40:18,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 05:40:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:18,047 INFO L225 Difference]: With dead ends: 44 [2020-12-22 05:40:18,047 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 05:40:18,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:40:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 05:40:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-12-22 05:40:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:40:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 05:40:18,088 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2020-12-22 05:40:18,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:18,089 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 05:40:18,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:40:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 05:40:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:40:18,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:18,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:18,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-22 05:40:18,306 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:18,308 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-22 05:40:18,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:18,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126949184] [2020-12-22 05:40:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:18,339 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:18,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321603728] [2020-12-22 05:40:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:40:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:18,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:40:18,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:18,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126949184] [2020-12-22 05:40:18,489 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:18,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321603728] [2020-12-22 05:40:18,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:18,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:40:18,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770399998] [2020-12-22 05:40:18,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:40:18,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:18,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:40:18,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:40:18,493 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-22 05:40:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:18,556 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-22 05:40:18,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:40:18,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 05:40:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:18,558 INFO L225 Difference]: With dead ends: 29 [2020-12-22 05:40:18,559 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:40:18,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:40:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:40:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-22 05:40:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:40:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 05:40:18,567 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-12-22 05:40:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:18,568 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 05:40:18,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:40:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 05:40:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:40:18,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:18,569 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-12-22 05:40:18,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:18,783 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2020-12-22 05:40:18,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:18,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120830883] [2020-12-22 05:40:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:18,806 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:18,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934899580] [2020-12-22 05:40:18,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:40:18,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:40:18,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:18,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 05:40:18,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:19,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120830883] [2020-12-22 05:40:19,073 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:19,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934899580] [2020-12-22 05:40:19,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:19,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:40:19,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179143214] [2020-12-22 05:40:19,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:40:19,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:40:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:40:19,077 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-12-22 05:40:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:19,152 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-22 05:40:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:40:19,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 05:40:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:19,154 INFO L225 Difference]: With dead ends: 33 [2020-12-22 05:40:19,154 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 05:40:19,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:40:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 05:40:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-22 05:40:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:40:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 05:40:19,161 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2020-12-22 05:40:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:19,162 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 05:40:19,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:40:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 05:40:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:40:19,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:19,163 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2020-12-22 05:40:19,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:19,374 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:19,376 INFO L82 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2020-12-22 05:40:19,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:19,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580076031] [2020-12-22 05:40:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:19,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:19,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872449393] [2020-12-22 05:40:19,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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