/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_compare_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:02:55,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:02:55,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:02:55,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:02:55,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:02:55,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:02:55,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:02:55,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:02:55,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:02:55,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:02:55,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:02:55,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:02:55,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:02:55,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:02:55,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:02:55,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:02:55,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:02:55,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:02:55,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:02:55,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:02:55,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:02:55,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:02:55,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:02:55,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:02:55,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:02:55,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:02:55,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:02:55,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:02:55,850 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 23:02:55,864 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:02:55,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:02:55,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:02:55,865 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:02:55,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:02:55,866 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:02:55,866 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:02:55,866 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:02:55,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:02:55,867 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:02:55,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:02:55,867 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:02:55,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:02:55,867 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:02:55,868 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:02:55,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:02:55,869 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:02:55,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:02:55,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:02:55,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:02:55,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:02:55,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:02:55,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:02:55,870 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:02:55,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:02:55,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:02:55,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:02:55,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:02:55,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:02:55,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:02:55,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:02:55,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:02:55,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:02:55,872 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:02:55,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:02:55,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:02:55,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:02:55,873 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:02:56,180 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:02:56,199 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:02:56,204 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:02:56,205 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:02:56,206 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:02:56,206 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compare_ground.i [2019-11-23 23:02:56,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73437e14e/28a8c0159f244b178f870c927adc6f27/FLAG4b8172c42 [2019-11-23 23:02:56,742 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:02:56,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compare_ground.i [2019-11-23 23:02:56,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73437e14e/28a8c0159f244b178f870c927adc6f27/FLAG4b8172c42 [2019-11-23 23:02:57,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73437e14e/28a8c0159f244b178f870c927adc6f27 [2019-11-23 23:02:57,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:02:57,187 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:02:57,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:02:57,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:02:57,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:02:57,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f8c8d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57, skipping insertion in model container [2019-11-23 23:02:57,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:02:57,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:02:57,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:02:57,447 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:02:57,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:02:57,487 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:02:57,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57 WrapperNode [2019-11-23 23:02:57,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:02:57,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:02:57,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:02:57,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:02:57,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:02:57,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:02:57,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:02:57,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:02:57,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (1/1) ... [2019-11-23 23:02:57,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:02:57,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:02:57,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:02:57,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:02:57,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (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 23:02:57,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:02:57,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:02:57,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:02:57,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:02:57,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:02:57,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:02:58,056 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:02:58,057 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:02:58,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:02:58 BoogieIcfgContainer [2019-11-23 23:02:58,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:02:58,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:02:58,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:02:58,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:02:58,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:02:57" (1/3) ... [2019-11-23 23:02:58,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad36c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:02:58, skipping insertion in model container [2019-11-23 23:02:58,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:57" (2/3) ... [2019-11-23 23:02:58,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad36c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:02:58, skipping insertion in model container [2019-11-23 23:02:58,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:02:58" (3/3) ... [2019-11-23 23:02:58,066 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2019-11-23 23:02:58,076 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:02:58,084 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:02:58,095 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:02:58,115 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:02:58,115 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:02:58,115 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:02:58,115 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:02:58,115 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:02:58,115 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:02:58,116 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:02:58,116 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:02:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 23:02:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:02:58,135 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:58,136 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:02:58,137 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash 806929874, now seen corresponding path program 1 times [2019-11-23 23:02:58,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:58,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185359006] [2019-11-23 23:02:58,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:58,295 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 23:02:58,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185359006] [2019-11-23 23:02:58,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:02:58,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:02:58,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187760819] [2019-11-23 23:02:58,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:02:58,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:02:58,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:02:58,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:02:58,320 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 23:02:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:02:58,355 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2019-11-23 23:02:58,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:02:58,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:02:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:02:58,365 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:02:58,365 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:02:58,368 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 23:02:58,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:02:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:02:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:02:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-11-23 23:02:58,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2019-11-23 23:02:58,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:02:58,398 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-11-23 23:02:58,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:02:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-11-23 23:02:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:02:58,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:58,399 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:02:58,400 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:58,400 INFO L82 PathProgramCache]: Analyzing trace with hash -85995054, now seen corresponding path program 1 times [2019-11-23 23:02:58,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:58,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894908422] [2019-11-23 23:02:58,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:58,462 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 23:02:58,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894908422] [2019-11-23 23:02:58,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:02:58,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:02:58,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453889009] [2019-11-23 23:02:58,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:02:58,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:02:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:02:58,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:02:58,467 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 3 states. [2019-11-23 23:02:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:02:58,479 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2019-11-23 23:02:58,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:02:58,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:02:58,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:02:58,480 INFO L225 Difference]: With dead ends: 17 [2019-11-23 23:02:58,480 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 23:02:58,481 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 23:02:58,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 23:02:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 23:02:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 23:02:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-23 23:02:58,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2019-11-23 23:02:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:02:58,485 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-23 23:02:58,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:02:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-23 23:02:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:02:58,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:58,487 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:02:58,487 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:58,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:58,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1639038131, now seen corresponding path program 1 times [2019-11-23 23:02:58,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:58,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341559170] [2019-11-23 23:02:58,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:02:58,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341559170] [2019-11-23 23:02:58,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929834947] [2019-11-23 23:02:58,564 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 23:02:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:58,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:02:58,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:02:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:02:58,652 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:02:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:02:58,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1465335460] [2019-11-23 23:02:58,701 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:02:58,701 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:02:58,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:02:58,714 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:02:58,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:03:16,496 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-23 23:03:16,633 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 191 [2019-11-23 23:03:18,742 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 206 [2019-11-23 23:03:36,790 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 240 [2019-11-23 23:03:39,631 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 242 [2019-11-23 23:03:39,828 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 226 [2019-11-23 23:03:42,887 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 246 [2019-11-23 23:03:46,016 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2019-11-23 23:03:49,161 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 250 [2019-11-23 23:03:52,543 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 254 [2019-11-23 23:03:55,904 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 257 [2019-11-23 23:03:59,361 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 259 [2019-11-23 23:04:03,117 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 268 [2019-11-23 23:04:07,245 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 276 [2019-11-23 23:04:11,410 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 275 [2019-11-23 23:04:15,628 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 281 [2019-11-23 23:04:19,788 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 282 [2019-11-23 23:04:23,945 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 286 [2019-11-23 23:04:28,401 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 291