/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/init-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:20:37,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:20:37,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:20:37,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:20:37,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:20:37,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:20:37,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:20:37,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:20:37,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:20:37,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:20:37,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:20:37,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:20:37,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:20:37,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:20:37,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:20:37,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:20:37,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:20:37,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:20:37,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:20:37,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:20:37,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:20:37,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:20:37,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:20:37,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:20:37,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:20:37,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:20:37,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:20:37,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:20:37,727 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 23:20:37,741 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:20:37,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:20:37,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:20:37,742 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:20:37,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:20:37,743 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:20:37,743 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:20:37,743 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:20:37,743 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:20:37,744 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:20:37,744 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:20:37,744 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:20:37,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:20:37,744 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:20:37,745 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:20:37,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:20:37,745 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:20:37,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:20:37,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:20:37,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:20:37,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:20:37,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:20:37,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:20:37,747 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:20:37,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:20:37,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:20:37,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:20:37,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:20:37,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:20:37,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:20:37,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:20:37,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:20:37,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:20:37,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:20:37,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:20:37,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:20:37,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:20:37,750 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:20:38,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:20:38,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:20:38,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:20:38,034 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:20:38,035 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:20:38,035 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-2-n-u.c [2019-11-23 23:20:38,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7628aecec/1ba912be479e463bae5c6b7c00e6c9eb/FLAG8ee7729df [2019-11-23 23:20:38,551 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:20:38,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-2-n-u.c [2019-11-23 23:20:38,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7628aecec/1ba912be479e463bae5c6b7c00e6c9eb/FLAG8ee7729df [2019-11-23 23:20:38,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7628aecec/1ba912be479e463bae5c6b7c00e6c9eb [2019-11-23 23:20:38,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:20:38,944 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:20:38,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:20:38,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:20:38,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:20:38,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:38" (1/1) ... [2019-11-23 23:20:38,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74bd07b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:38, skipping insertion in model container [2019-11-23 23:20:38,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:38" (1/1) ... [2019-11-23 23:20:38,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:20:38,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:20:39,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:20:39,221 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:20:39,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:20:39,270 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:20:39,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39 WrapperNode [2019-11-23 23:20:39,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:20:39,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:20:39,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:20:39,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:20:39,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (1/1) ... [2019-11-23 23:20:39,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (1/1) ... [2019-11-23 23:20:39,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:20:39,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:20:39,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:20:39,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:20:39,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (1/1) ... [2019-11-23 23:20:39,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (1/1) ... [2019-11-23 23:20:39,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (1/1) ... [2019-11-23 23:20:39,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (1/1) ... [2019-11-23 23:20:39,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (1/1) ... [2019-11-23 23:20:39,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (1/1) ... [2019-11-23 23:20:39,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (1/1) ... [2019-11-23 23:20:39,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:20:39,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:20:39,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:20:39,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:20:39,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (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 23:20:39,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:20:39,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:20:39,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:20:39,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:20:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:20:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:20:39,842 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:20:39,842 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 23:20:39,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:39 BoogieIcfgContainer [2019-11-23 23:20:39,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:20:39,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:20:39,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:20:39,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:20:39,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:20:38" (1/3) ... [2019-11-23 23:20:39,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31abca24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:39, skipping insertion in model container [2019-11-23 23:20:39,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:39" (2/3) ... [2019-11-23 23:20:39,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31abca24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:39, skipping insertion in model container [2019-11-23 23:20:39,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:39" (3/3) ... [2019-11-23 23:20:39,850 INFO L109 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2019-11-23 23:20:39,860 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:20:39,867 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:20:39,878 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:20:39,900 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:20:39,901 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:20:39,901 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:20:39,901 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:20:39,901 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:20:39,901 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:20:39,901 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:20:39,901 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:20:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:20:39,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:20:39,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:39,924 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:20:39,924 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:39,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:39,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1357945994, now seen corresponding path program 1 times [2019-11-23 23:20:39,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:39,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154893191] [2019-11-23 23:20:39,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:40,010 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:40,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289437455] [2019-11-23 23:20:40,011 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 23:20:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:40,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:40,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:40,106 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 23:20:40,106 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:40,119 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 23:20:40,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154893191] [2019-11-23 23:20:40,121 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:40,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289437455] [2019-11-23 23:20:40,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:40,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-23 23:20:40,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270019023] [2019-11-23 23:20:40,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:20:40,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:40,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:20:40,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:20:40,149 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2019-11-23 23:20:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:40,221 INFO L93 Difference]: Finished difference Result 20 states and 29 transitions. [2019-11-23 23:20:40,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:20:40,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-23 23:20:40,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:40,234 INFO L225 Difference]: With dead ends: 20 [2019-11-23 23:20:40,234 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:20:40,237 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 23:20:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:20:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:20:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:20:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-23 23:20:40,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 6 [2019-11-23 23:20:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:40,275 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-23 23:20:40,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:20:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2019-11-23 23:20:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:20:40,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:40,276 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:40,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:40,479 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash 834131770, now seen corresponding path program 1 times [2019-11-23 23:20:40,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:40,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676110381] [2019-11-23 23:20:40,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:40,486 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:40,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939614399] [2019-11-23 23:20:40,487 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 23:20:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:40,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:40,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:40,563 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 23:20:40,563 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:40,589 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 23:20:40,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676110381] [2019-11-23 23:20:40,590 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:40,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939614399] [2019-11-23 23:20:40,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:40,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-23 23:20:40,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087265131] [2019-11-23 23:20:40,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:20:40,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:20:40,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:20:40,594 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2019-11-23 23:20:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:40,682 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2019-11-23 23:20:40,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:20:40,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-23 23:20:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:40,684 INFO L225 Difference]: With dead ends: 32 [2019-11-23 23:20:40,684 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 23:20:40,685 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 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 23:20:40,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 23:20:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-23 23:20:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 23:20:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-11-23 23:20:40,693 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2019-11-23 23:20:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:40,693 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-11-23 23:20:40,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:20:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-11-23 23:20:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 23:20:40,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:40,694 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:40,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:40,907 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:40,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2121637946, now seen corresponding path program 1 times [2019-11-23 23:20:40,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:40,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409017451] [2019-11-23 23:20:40,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:40,913 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:40,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142853188] [2019-11-23 23:20:40,914 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 23:20:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:40,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 23:20:40,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:41,004 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 23:20:41,005 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:41,055 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 23:20:41,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409017451] [2019-11-23 23:20:41,056 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:41,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142853188] [2019-11-23 23:20:41,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1558138329] [2019-11-23 23:20:41,081 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:20:41,082 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:20:41,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:20:41,094 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:20:41,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:20:51,065 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 192 [2019-11-23 23:21:16,034 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 258 [2019-11-23 23:21:23,563 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 273 [2019-11-23 23:21:23,693 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 271 [2019-11-23 23:21:29,961 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 289 [2019-11-23 23:21:32,110 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 291 [2019-11-23 23:21:32,219 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 290 [2019-11-23 23:21:34,273 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 294 [2019-11-23 23:21:36,701 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-23 23:21:36,864 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 296 [2019-11-23 23:21:37,096 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 298 [2019-11-23 23:21:37,320 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 302 [2019-11-23 23:21:39,758 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 305 [2019-11-23 23:21:39,899 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-23 23:21:40,006 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 308 [2019-11-23 23:21:42,251 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2019-11-23 23:21:42,369 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 309 [2019-11-23 23:21:45,185 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 313 [2019-11-23 23:21:45,407 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 316 [2019-11-23 23:21:47,968 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 320 [2019-11-23 23:21:50,481 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 326 [2019-11-23 23:21:50,619 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 323 [2019-11-23 23:21:53,332 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-23 23:21:56,319 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 332 [2019-11-23 23:21:56,487 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 330 [2019-11-23 23:21:59,163 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 337 [2019-11-23 23:21:59,280 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 333 [2019-11-23 23:22:02,219 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2019-11-23 23:22:02,575 WARN L192 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 335 [2019-11-23 23:22:02,881 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 23:22:03,153 WARN L192 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 337 [2019-11-23 23:22:06,174 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 342 [2019-11-23 23:22:08,968 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-23 23:22:09,098 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 345 [2019-11-23 23:22:11,948 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 349 [2019-11-23 23:22:12,069 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 348