/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-crafted/zero_sum_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:59:40,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:59:40,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:59:40,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:59:40,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:59:40,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:59:40,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:59:40,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:59:40,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:59:40,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:59:40,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:59:40,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:59:40,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:59:40,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:59:40,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:59:40,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:59:40,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:59:40,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:59:40,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:59:40,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:59:40,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:59:40,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:59:40,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:59:40,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:59:40,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:59:40,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:59:40,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:59:40,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:59:40,610 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 22:59:40,624 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:59:40,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:59:40,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:59:40,626 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:59:40,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:59:40,626 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:59:40,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:59:40,627 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:59:40,627 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:59:40,627 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:59:40,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:59:40,627 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:59:40,628 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:59:40,628 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:59:40,628 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:59:40,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:59:40,629 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:59:40,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:59:40,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:59:40,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:59:40,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:59:40,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:59:40,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:59:40,630 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:59:40,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:59:40,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:59:40,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:59:40,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:59:40,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:59:40,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:59:40,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:59:40,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:59:40,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:59:40,632 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:59:40,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:59:40,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:59:40,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:59:40,633 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:59:40,895 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:59:40,910 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:59:40,914 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:59:40,915 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:59:40,915 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:59:40,916 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2019-11-23 22:59:40,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9116ddfdd/df145c07eadf428caa4b2aaebf67e86d/FLAG000949c83 [2019-11-23 22:59:41,423 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:59:41,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2019-11-23 22:59:41,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9116ddfdd/df145c07eadf428caa4b2aaebf67e86d/FLAG000949c83 [2019-11-23 22:59:41,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9116ddfdd/df145c07eadf428caa4b2aaebf67e86d [2019-11-23 22:59:41,813 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:59:41,814 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:59:41,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:41,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:59:41,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:59:41,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e39db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41, skipping insertion in model container [2019-11-23 22:59:41,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:59:41,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:59:42,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:42,041 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:59:42,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:42,087 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:59:42,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42 WrapperNode [2019-11-23 22:59:42,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:42,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:42,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:59:42,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:59:42,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (1/1) ... [2019-11-23 22:59:42,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (1/1) ... [2019-11-23 22:59:42,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:42,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:59:42,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:59:42,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:59:42,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (1/1) ... [2019-11-23 22:59:42,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (1/1) ... [2019-11-23 22:59:42,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (1/1) ... [2019-11-23 22:59:42,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (1/1) ... [2019-11-23 22:59:42,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (1/1) ... [2019-11-23 22:59:42,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (1/1) ... [2019-11-23 22:59:42,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (1/1) ... [2019-11-23 22:59:42,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:59:42,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:59:42,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:59:42,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:59:42,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (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 22:59:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:59:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:59:42,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:59:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:59:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:59:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:59:42,824 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:59:42,824 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:59:42,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:42 BoogieIcfgContainer [2019-11-23 22:59:42,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:59:42,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:59:42,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:59:42,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:59:42,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:59:41" (1/3) ... [2019-11-23 22:59:42,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb8a289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:42, skipping insertion in model container [2019-11-23 22:59:42,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:42" (2/3) ... [2019-11-23 22:59:42,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb8a289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:42, skipping insertion in model container [2019-11-23 22:59:42,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:42" (3/3) ... [2019-11-23 22:59:42,833 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2019-11-23 22:59:42,842 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:59:42,850 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:59:42,861 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:59:42,886 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:59:42,886 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:59:42,886 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:59:42,887 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:59:42,887 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:59:42,887 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:59:42,887 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:59:42,887 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:59:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-23 22:59:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:59:42,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:42,910 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:42,910 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash 493697276, now seen corresponding path program 1 times [2019-11-23 22:59:42,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:42,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131900830] [2019-11-23 22:59:42,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:43,124 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 22:59:43,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131900830] [2019-11-23 22:59:43,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:43,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:59:43,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195281637] [2019-11-23 22:59:43,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:59:43,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:59:43,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:59:43,143 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2019-11-23 22:59:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:43,246 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2019-11-23 22:59:43,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:59:43,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 22:59:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:43,261 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:59:43,262 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:59:43,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:59:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:59:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 22:59:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:59:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 37 transitions. [2019-11-23 22:59:43,320 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 37 transitions. Word has length 13 [2019-11-23 22:59:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:43,321 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 37 transitions. [2019-11-23 22:59:43,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:59:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 37 transitions. [2019-11-23 22:59:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:59:43,322 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:43,323 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:43,323 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:43,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:43,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1876918952, now seen corresponding path program 1 times [2019-11-23 22:59:43,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:43,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923638284] [2019-11-23 22:59:43,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:59:43,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923638284] [2019-11-23 22:59:43,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:43,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:59:43,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449179565] [2019-11-23 22:59:43,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:59:43,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:43,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:59:43,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:59:43,410 INFO L87 Difference]: Start difference. First operand 22 states and 37 transitions. Second operand 3 states. [2019-11-23 22:59:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:43,478 INFO L93 Difference]: Finished difference Result 42 states and 72 transitions. [2019-11-23 22:59:43,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:59:43,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 22:59:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:43,480 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:59:43,480 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:59:43,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:59:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:59:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:59:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:59:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 38 transitions. [2019-11-23 22:59:43,494 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 38 transitions. Word has length 14 [2019-11-23 22:59:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:43,494 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 38 transitions. [2019-11-23 22:59:43,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:59:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 38 transitions. [2019-11-23 22:59:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:59:43,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:43,496 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:43,496 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:43,496 INFO L82 PathProgramCache]: Analyzing trace with hash -696142449, now seen corresponding path program 1 times [2019-11-23 22:59:43,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:43,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265405861] [2019-11-23 22:59:43,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:59:43,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265405861] [2019-11-23 22:59:43,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:43,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:59:43,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094159915] [2019-11-23 22:59:43,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:59:43,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:43,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:59:43,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:59:43,577 INFO L87 Difference]: Start difference. First operand 23 states and 38 transitions. Second operand 4 states. [2019-11-23 22:59:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:43,682 INFO L93 Difference]: Finished difference Result 40 states and 68 transitions. [2019-11-23 22:59:43,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:59:43,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:59:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:43,685 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:59:43,685 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:59:43,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 22:59:43,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:59:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:59:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:59:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-23 22:59:43,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 15 [2019-11-23 22:59:43,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:43,702 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-23 22:59:43,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:59:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-23 22:59:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:59:43,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:43,704 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:43,704 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash -966271019, now seen corresponding path program 1 times [2019-11-23 22:59:43,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:43,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133393001] [2019-11-23 22:59:43,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:59:43,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133393001] [2019-11-23 22:59:43,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035922167] [2019-11-23 22:59:43,783 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 22:59:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:43,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:59:43,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:59:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:59:43,908 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:59:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:59:43,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127470177] [2019-11-23 22:59:43,965 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-23 22:59:43,965 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:59:43,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:59:43,979 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:59:43,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:59:45,952 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 131 [2019-11-23 22:59:47,606 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 138 [2019-11-23 22:59:47,833 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 141 [2019-11-23 22:59:48,796 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 145 [2019-11-23 23:00:00,839 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 199 [2019-11-23 23:00:01,077 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 201 [2019-11-23 23:00:35,926 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2019-11-23 23:00:38,005 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 306 [2019-11-23 23:00:42,374 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 311 [2019-11-23 23:00:42,604 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 313 [2019-11-23 23:00:44,986 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 316 [2019-11-23 23:00:47,435 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2019-11-23 23:00:49,845 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 332 [2019-11-23 23:00:50,211 WARN L192 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 327 [2019-11-23 23:00:53,049 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-23 23:00:55,627 WARN L192 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 337 [2019-11-23 23:00:56,037 WARN L192 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 333 [2019-11-23 23:00:56,353 WARN L192 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-23 23:00:56,538 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 336 [2019-11-23 23:00:58,994 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 343 [2019-11-23 23:00:59,125 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 338 [2019-11-23 23:00:59,277 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 23:00:59,384 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 340 [2019-11-23 23:01:01,746 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2019-11-23 23:01:01,879 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 343 [2019-11-23 23:01:02,006 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 23:01:02,126 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 345 [2019-11-23 23:01:02,269 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:01:02,385 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 349 [2019-11-23 23:01:05,112 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2019-11-23 23:01:05,230 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 354 [2019-11-23 23:01:07,818 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2019-11-23 23:01:07,948 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 358 [2019-11-23 23:01:10,618 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 365 [2019-11-23 23:01:10,766 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 360 [2019-11-23 23:01:13,383 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 363 [2019-11-23 23:01:13,539 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 363