/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-examples/standard_init4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:09:20,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:09:20,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:09:20,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:09:20,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:09:20,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:09:20,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:09:20,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:09:20,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:09:20,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:09:20,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:09:20,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:09:20,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:09:20,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:09:20,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:09:20,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:09:20,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:09:20,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:09:20,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:09:20,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:09:21,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:09:21,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:09:21,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:09:21,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:09:21,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:09:21,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:09:21,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:09:21,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:09:21,023 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 23:09:21,055 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:09:21,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:09:21,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:09:21,059 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:09:21,059 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:09:21,059 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:09:21,060 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:09:21,060 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:09:21,060 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:09:21,060 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:09:21,060 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:09:21,060 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:09:21,061 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:09:21,061 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:09:21,061 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:09:21,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:09:21,064 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:09:21,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:09:21,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:09:21,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:09:21,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:09:21,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:09:21,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:09:21,065 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:09:21,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:09:21,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:09:21,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:09:21,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:09:21,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:09:21,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:09:21,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:09:21,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:09:21,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:09:21,067 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:09:21,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:09:21,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:09:21,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:09:21,069 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:09:21,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:09:21,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:09:21,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:09:21,351 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:09:21,352 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:09:21,353 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2019-11-23 23:09:21,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471df619c/e7785b311c414f00aa78d3b1f83fb06e/FLAGba2e57e08 [2019-11-23 23:09:21,895 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:09:21,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2019-11-23 23:09:21,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471df619c/e7785b311c414f00aa78d3b1f83fb06e/FLAGba2e57e08 [2019-11-23 23:09:22,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471df619c/e7785b311c414f00aa78d3b1f83fb06e [2019-11-23 23:09:22,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:09:22,396 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:09:22,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:09:22,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:09:22,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:09:22,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e1f606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22, skipping insertion in model container [2019-11-23 23:09:22,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:09:22,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:09:22,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:09:22,617 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:09:22,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:09:22,653 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:09:22,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22 WrapperNode [2019-11-23 23:09:22,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:09:22,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:09:22,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:09:22,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:09:22,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:09:22,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:09:22,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:09:22,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:09:22,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (1/1) ... [2019-11-23 23:09:22,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:09:22,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:09:22,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:09:22,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:09:22,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (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 23:09:22,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:09:22,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:09:22,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:09:22,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:09:22,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:09:22,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:09:23,219 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:09:23,220 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 23:09:23,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:09:23 BoogieIcfgContainer [2019-11-23 23:09:23,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:09:23,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:09:23,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:09:23,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:09:23,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:09:22" (1/3) ... [2019-11-23 23:09:23,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb80802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:09:23, skipping insertion in model container [2019-11-23 23:09:23,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:22" (2/3) ... [2019-11-23 23:09:23,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb80802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:09:23, skipping insertion in model container [2019-11-23 23:09:23,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:09:23" (3/3) ... [2019-11-23 23:09:23,234 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2019-11-23 23:09:23,243 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:09:23,251 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:09:23,263 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:09:23,284 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:09:23,284 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:09:23,284 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:09:23,284 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:09:23,284 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:09:23,284 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:09:23,285 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:09:23,285 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:09:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 23:09:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:09:23,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:09:23,302 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:09:23,302 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:09:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:09:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash 531840531, now seen corresponding path program 1 times [2019-11-23 23:09:23,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:09:23,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648948009] [2019-11-23 23:09:23,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:09:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:09:23,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648948009] [2019-11-23 23:09:23,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:09:23,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:09:23,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324533567] [2019-11-23 23:09:23,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:09:23,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:09:23,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:09:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:09:23,468 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 23:09:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:09:23,527 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2019-11-23 23:09:23,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:09:23,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:09:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:09:23,536 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:09:23,536 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 23:09:23,538 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 23:09:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 23:09:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 23:09:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 23:09:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2019-11-23 23:09:23,568 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2019-11-23 23:09:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:09:23,568 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2019-11-23 23:09:23,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:09:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2019-11-23 23:09:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 23:09:23,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:09:23,570 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:09:23,570 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:09:23,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:09:23,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1496312537, now seen corresponding path program 1 times [2019-11-23 23:09:23,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:09:23,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891709734] [2019-11-23 23:09:23,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:09:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:09:23,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891709734] [2019-11-23 23:09:23,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334158886] [2019-11-23 23:09:23,623 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 23:09:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:23,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:09:23,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:09:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:09:23,698 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:09:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:09:23,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093530616] [2019-11-23 23:09:23,767 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:09:23,768 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:09:23,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:09:23,780 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:09:23,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:10:22,369 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2019-11-23 23:10:22,505 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 305 [2019-11-23 23:10:22,638 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-23 23:10:27,129 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 318 [2019-11-23 23:10:36,157 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 333 [2019-11-23 23:10:53,643 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 362 [2019-11-23 23:10:53,778 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 364