/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/add-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:18:58,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:18:58,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:18:58,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:18:58,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:18:58,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:18:58,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:18:58,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:18:58,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:18:58,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:18:58,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:18:58,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:18:58,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:18:58,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:18:58,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:18:58,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:18:58,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:18:58,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:18:58,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:18:58,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:18:58,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:18:58,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:18:58,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:18:58,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:18:58,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:18:58,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:18:58,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:18:58,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:18:58,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 23:18:58,939 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:18:58,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:18:58,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:18:58,940 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:18:58,940 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:18:58,940 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:18:58,941 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:18:58,941 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:18:58,941 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:18:58,941 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:18:58,941 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:18:58,941 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:18:58,942 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:18:58,942 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:18:58,942 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:18:58,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:18:58,943 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:18:58,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:18:58,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:18:58,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:18:58,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:18:58,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:18:58,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:18:58,944 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:18:58,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:18:58,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:18:58,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:18:58,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:18:58,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:18:58,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:18:58,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:18:58,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:18:58,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:18:58,946 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:18:58,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:18:58,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:18:58,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:18:58,947 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:18:59,286 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:18:59,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:18:59,313 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:18:59,315 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:18:59,315 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:18:59,316 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/add-2-n-u.c [2019-11-23 23:18:59,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66cd6112e/3d287b34ca6b4fa29ac7015e0adaa174/FLAG61ac1c64f [2019-11-23 23:18:59,865 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:18:59,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/add-2-n-u.c [2019-11-23 23:18:59,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66cd6112e/3d287b34ca6b4fa29ac7015e0adaa174/FLAG61ac1c64f [2019-11-23 23:19:00,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66cd6112e/3d287b34ca6b4fa29ac7015e0adaa174 [2019-11-23 23:19:00,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:19:00,252 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:19:00,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:19:00,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:19:00,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:19:00,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff2f9ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00, skipping insertion in model container [2019-11-23 23:19:00,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:19:00,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:19:00,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:19:00,471 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:19:00,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:19:00,516 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:19:00,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00 WrapperNode [2019-11-23 23:19:00,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:19:00,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:19:00,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:19:00,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:19:00,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:19:00,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:19:00,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:19:00,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:19:00,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (1/1) ... [2019-11-23 23:19:00,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:19:00,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:19:00,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:19:00,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:19:00,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (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 [2019-11-23 23:19:00,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:19:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:19:00,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:19:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:19:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:19:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:19:01,137 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:19:01,138 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 23:19:01,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:19:01 BoogieIcfgContainer [2019-11-23 23:19:01,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:19:01,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:19:01,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:19:01,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:19:01,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:19:00" (1/3) ... [2019-11-23 23:19:01,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6501a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:19:01, skipping insertion in model container [2019-11-23 23:19:01,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:00" (2/3) ... [2019-11-23 23:19:01,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6501a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:19:01, skipping insertion in model container [2019-11-23 23:19:01,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:19:01" (3/3) ... [2019-11-23 23:19:01,147 INFO L109 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2019-11-23 23:19:01,157 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:19:01,164 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:19:01,179 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:19:01,212 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:19:01,212 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:19:01,213 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:19:01,213 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:19:01,213 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:19:01,213 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:19:01,213 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:19:01,214 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:19:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 23:19:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:19:01,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:19:01,240 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:19:01,240 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:19:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:19:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash -919157595, now seen corresponding path program 1 times [2019-11-23 23:19:01,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:19:01,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231704362] [2019-11-23 23:19:01,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:19:01,319 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:19:01,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938088399] [2019-11-23 23:19:01,320 INFO L94 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 [2019-11-23 23:19:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:19:01,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:19:01,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:19:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:19:01,449 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:19:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:19:01,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231704362] [2019-11-23 23:19:01,460 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:19:01,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938088399] [2019-11-23 23:19:01,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:19:01,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-23 23:19:01,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812450509] [2019-11-23 23:19:01,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:19:01,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:19:01,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:19:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:19:01,485 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2019-11-23 23:19:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:19:01,576 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2019-11-23 23:19:01,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:19:01,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:19:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:19:01,587 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:19:01,588 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 23:19:01,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:19:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 23:19:01,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 23:19:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 23:19:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2019-11-23 23:19:01,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 20 transitions. Word has length 7 [2019-11-23 23:19:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:19:01,628 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-23 23:19:01,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:19:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 20 transitions. [2019-11-23 23:19:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:19:01,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:19:01,629 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:19:01,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:19:01,835 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:19:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:19:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1545571225, now seen corresponding path program 1 times [2019-11-23 23:19:01,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:19:01,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274970159] [2019-11-23 23:19:01,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:19:01,844 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:19:01,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128921834] [2019-11-23 23:19:01,845 INFO L94 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 [2019-11-23 23:19:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:19:01,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:19:01,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:19:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:19:01,921 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:19:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:19:01,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274970159] [2019-11-23 23:19:01,941 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:19:01,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128921834] [2019-11-23 23:19:01,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:19:01,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-23 23:19:01,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538895906] [2019-11-23 23:19:01,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:19:01,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:19:01,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:19:01,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:19:01,945 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. Second operand 6 states. [2019-11-23 23:19:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:19:02,067 INFO L93 Difference]: Finished difference Result 39 states and 59 transitions. [2019-11-23 23:19:02,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:19:02,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 23:19:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:19:02,068 INFO L225 Difference]: With dead ends: 39 [2019-11-23 23:19:02,069 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 23:19:02,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 23:19:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 23:19:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-11-23 23:19:02,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 23:19:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-23 23:19:02,079 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-11-23 23:19:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:19:02,080 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-23 23:19:02,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:19:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-23 23:19:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 23:19:02,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:19:02,081 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:19:02,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:19:02,285 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:19:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:19:02,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1179586919, now seen corresponding path program 1 times [2019-11-23 23:19:02,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:19:02,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824764749] [2019-11-23 23:19:02,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:19:02,291 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:19:02,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909512440] [2019-11-23 23:19:02,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 23:19:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:19:02,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 23:19:02,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:19:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 23:19:02,385 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:19:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 23:19:02,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824764749] [2019-11-23 23:19:02,451 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:19:02,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909512440] [2019-11-23 23:19:02,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686769677] [2019-11-23 23:19:02,504 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:19:02,507 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:19:02,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:19:02,526 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:19:02,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:19:04,191 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 120 [2019-11-23 23:19:04,319 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 120 [2019-11-23 23:19:04,759 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 129 [2019-11-23 23:19:05,726 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 155 [2019-11-23 23:19:06,547 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 160 [2019-11-23 23:19:07,393 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 163 [2019-11-23 23:19:08,267 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 166 [2019-11-23 23:19:09,332 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 160 [2019-11-23 23:19:12,634 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-11-23 23:19:13,933 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-23 23:19:15,294 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2019-11-23 23:19:17,047 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 199 [2019-11-23 23:19:19,016 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 206 [2019-11-23 23:19:21,066 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2019-11-23 23:19:21,231 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-23 23:19:21,413 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 201 [2019-11-23 23:19:23,270 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 215 [2019-11-23 23:19:25,273 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2019-11-23 23:19:27,345 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 222 [2019-11-23 23:19:29,415 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 225 [2019-11-23 23:19:31,826 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 232 [2019-11-23 23:19:34,168 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 234 [2019-11-23 23:19:36,580 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 238 [2019-11-23 23:19:39,075 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 241 [2019-11-23 23:19:41,552 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 244 [2019-11-23 23:19:44,175 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 247 [2019-11-23 23:19:44,393 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 232 [2019-11-23 23:19:46,889 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 249 [2019-11-23 23:19:47,110 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 236 [2019-11-23 23:19:49,686 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 253 [2019-11-23 23:19:49,852 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2019-11-23 23:19:50,037 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 240 [2019-11-23 23:19:52,768 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 256 [2019-11-23 23:19:55,961 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 259 [2019-11-23 23:19:58,948 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 262 [2019-11-23 23:20:02,037 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 265 [2019-11-23 23:20:05,169 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 269 [2019-11-23 23:20:08,430 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 270 [2019-11-23 23:20:11,707 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 275 [2019-11-23 23:20:11,882 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2019-11-23 23:20:15,155 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 275 [2019-11-23 23:20:18,501 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 280 [2019-11-23 23:20:18,730 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 273 [2019-11-23 23:20:22,036 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 284 [2019-11-23 23:20:25,548 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 285 [2019-11-23 23:20:25,787 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 281 [2019-11-23 23:20:29,320 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 288 [2019-11-23 23:20:29,458 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2019-11-23 23:20:29,574 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 282 [2019-11-23 23:20:33,136 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 292 [2019-11-23 23:20:33,378 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 284