/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-programs/copysome2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:23:37,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:23:37,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:23:37,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:23:37,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:23:37,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:23:37,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:23:37,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:23:37,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:23:37,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:23:37,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:23:37,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:23:37,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:23:37,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:23:37,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:23:37,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:23:37,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:23:37,275 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 23:23:37,301 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:23:37,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:23:37,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:23:37,303 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:23:37,303 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:23:37,303 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:23:37,303 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:23:37,303 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:23:37,304 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:23:37,304 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:23:37,305 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:23:37,305 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:23:37,305 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:23:37,306 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:23:37,306 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:23:37,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:23:37,307 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:23:37,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:23:37,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:23:37,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:23:37,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:23:37,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:23:37,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:23:37,309 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:23:37,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:23:37,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:23:37,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:23:37,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:23:37,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:23:37,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:23:37,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:23:37,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:23:37,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:23:37,312 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:23:37,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:23:37,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:23:37,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:23:37,313 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:23:37,610 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:23:37,626 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:23:37,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:23:37,631 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:23:37,632 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:23:37,632 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-1.i [2019-11-23 23:23:37,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c47f2d3b9/5cb52e0a84cd4102809ec61c8faabdf1/FLAGd3c048fd9 [2019-11-23 23:23:38,157 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:23:38,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome2-1.i [2019-11-23 23:23:38,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c47f2d3b9/5cb52e0a84cd4102809ec61c8faabdf1/FLAGd3c048fd9 [2019-11-23 23:23:38,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c47f2d3b9/5cb52e0a84cd4102809ec61c8faabdf1 [2019-11-23 23:23:38,532 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:23:38,537 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:23:38,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:23:38,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:23:38,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:23:38,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f7bf8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38, skipping insertion in model container [2019-11-23 23:23:38,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:23:38,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:23:38,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:23:38,751 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:23:38,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:23:38,793 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:23:38,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38 WrapperNode [2019-11-23 23:23:38,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:23:38,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:23:38,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:23:38,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:23:38,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:23:38,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:23:38,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:23:38,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:23:38,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (1/1) ... [2019-11-23 23:23:38,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:23:38,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:23:38,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:23:38,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:23:38,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (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 23:23:39,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:23:39,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:23:39,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:23:39,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:23:39,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:23:39,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:23:39,476 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:23:39,476 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 23:23:39,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:23:39 BoogieIcfgContainer [2019-11-23 23:23:39,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:23:39,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:23:39,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:23:39,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:23:39,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:23:38" (1/3) ... [2019-11-23 23:23:39,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5070ee23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:23:39, skipping insertion in model container [2019-11-23 23:23:39,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:23:38" (2/3) ... [2019-11-23 23:23:39,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5070ee23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:23:39, skipping insertion in model container [2019-11-23 23:23:39,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:23:39" (3/3) ... [2019-11-23 23:23:39,485 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2019-11-23 23:23:39,494 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:23:39,500 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:23:39,510 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:23:39,533 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:23:39,534 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:23:39,534 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:23:39,534 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:23:39,534 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:23:39,534 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:23:39,534 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:23:39,534 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:23:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:23:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:23:39,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:23:39,553 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:23:39,554 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:23:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:23:39,560 INFO L82 PathProgramCache]: Analyzing trace with hash 163046610, now seen corresponding path program 1 times [2019-11-23 23:23:39,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:23:39,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64330993] [2019-11-23 23:23:39,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:23:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:23:39,720 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 23:23:39,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64330993] [2019-11-23 23:23:39,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:23:39,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:23:39,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454990116] [2019-11-23 23:23:39,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:23:39,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:23:39,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:23:39,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:23:39,745 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-23 23:23:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:23:39,791 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 23:23:39,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:23:39,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:23:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:23:39,803 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:23:39,803 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:23:39,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 23:23:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:23:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:23:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:23:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-23 23:23:39,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2019-11-23 23:23:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:23:39,839 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-23 23:23:39,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:23:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-23 23:23:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:23:39,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:23:39,841 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:23:39,841 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:23:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:23:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1288255517, now seen corresponding path program 1 times [2019-11-23 23:23:39,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:23:39,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685072233] [2019-11-23 23:23:39,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:23:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:23:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:23:39,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685072233] [2019-11-23 23:23:39,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279222006] [2019-11-23 23:23:39,946 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 23:23:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:23:40,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:23:40,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:23:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:23:40,057 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:23:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:23:40,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761478629] [2019-11-23 23:23:40,103 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:23:40,104 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:23:40,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:23:40,117 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:23:40,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:23:43,119 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 181 [2019-11-23 23:23:44,807 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 205 [2019-11-23 23:23:44,928 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 205 [2019-11-23 23:23:45,147 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2019-11-23 23:23:45,270 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 210 [2019-11-23 23:23:47,972 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2019-11-23 23:23:48,212 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 214 [2019-11-23 23:23:52,051 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 243 [2019-11-23 23:23:52,298 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 216 [2019-11-23 23:23:56,739 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2019-11-23 23:23:57,012 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2019-11-23 23:23:57,221 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 224 [2019-11-23 23:24:00,923 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2019-11-23 23:24:01,242 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 229 [2019-11-23 23:24:05,167 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2019-11-23 23:24:05,439 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 231 [2019-11-23 23:24:08,940 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2019-11-23 23:24:13,525 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-23 23:24:17,856 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2019-11-23 23:24:18,088 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2019-11-23 23:24:18,226 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 239 [2019-11-23 23:24:22,444 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2019-11-23 23:24:26,903 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2019-11-23 23:24:27,134 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 246 [2019-11-23 23:24:32,844 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 279 [2019-11-23 23:24:37,920 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2019-11-23 23:24:38,202 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 256 [2019-11-23 23:24:43,709 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2019-11-23 23:24:49,485 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 291 [2019-11-23 23:24:55,140 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2019-11-23 23:25:00,891 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-23 23:25:07,069 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2019-11-23 23:25:07,436 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 276 [2019-11-23 23:25:13,168 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2019-11-23 23:25:13,511 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 277