/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_const_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:58:14,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:58:14,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:58:14,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:58:14,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:58:14,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:58:14,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:58:14,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:58:14,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:58:14,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:58:14,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:58:14,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:58:14,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:58:14,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:58:14,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:58:14,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:58:14,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:58:14,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:58:14,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:58:14,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:58:14,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:58:14,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:58:14,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:58:14,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:58:14,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:58:14,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:58:14,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:58:14,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:58:14,895 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 22:58:14,922 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:58:14,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:58:14,923 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:58:14,924 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:58:14,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:58:14,924 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:58:14,924 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:58:14,924 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:58:14,925 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:58:14,925 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:58:14,925 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:58:14,925 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:58:14,925 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:58:14,925 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:58:14,926 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:58:14,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:58:14,926 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:58:14,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:58:14,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:58:14,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:58:14,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:58:14,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:58:14,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:58:14,928 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:58:14,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:58:14,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:58:14,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:58:14,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:58:14,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:58:14,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:58:14,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:58:14,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:58:14,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:58:14,930 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:58:14,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:58:14,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:58:14,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:58:14,930 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:58:15,201 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:58:15,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:58:15,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:58:15,219 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:58:15,219 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:58:15,220 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2019-11-23 22:58:15,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/770807647/f8ad9a36ec6c4de5900e058b1d107aa5/FLAG9c67d9ff3 [2019-11-23 22:58:15,762 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:58:15,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2019-11-23 22:58:15,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/770807647/f8ad9a36ec6c4de5900e058b1d107aa5/FLAG9c67d9ff3 [2019-11-23 22:58:16,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/770807647/f8ad9a36ec6c4de5900e058b1d107aa5 [2019-11-23 22:58:16,148 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:58:16,150 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:58:16,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:58:16,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:58:16,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:58:16,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405abc90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16, skipping insertion in model container [2019-11-23 22:58:16,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:58:16,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:58:16,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:58:16,431 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:58:16,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:58:16,507 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:58:16,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16 WrapperNode [2019-11-23 22:58:16,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:58:16,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:58:16,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:58:16,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:58:16,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:58:16,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:58:16,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:58:16,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:58:16,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (1/1) ... [2019-11-23 22:58:16,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:58:16,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:58:16,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:58:16,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:58:16,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (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 22:58:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:58:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 22:58:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:58:16,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:58:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:58:17,309 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:58:17,309 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 22:58:17,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:58:17 BoogieIcfgContainer [2019-11-23 22:58:17,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:58:17,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:58:17,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:58:17,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:58:17,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:58:16" (1/3) ... [2019-11-23 22:58:17,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7e3e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:58:17, skipping insertion in model container [2019-11-23 22:58:17,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:16" (2/3) ... [2019-11-23 22:58:17,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7e3e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:58:17, skipping insertion in model container [2019-11-23 22:58:17,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:58:17" (3/3) ... [2019-11-23 22:58:17,320 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2019-11-23 22:58:17,330 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:58:17,338 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:58:17,351 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:58:17,376 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:58:17,376 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:58:17,377 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:58:17,377 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:58:17,377 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:58:17,377 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:58:17,378 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:58:17,378 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:58:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 22:58:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:58:17,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:17,402 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:17,402 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:17,408 INFO L82 PathProgramCache]: Analyzing trace with hash -431001582, now seen corresponding path program 1 times [2019-11-23 22:58:17,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:17,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623514086] [2019-11-23 22:58:17,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:17,621 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 22:58:17,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623514086] [2019-11-23 22:58:17,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:17,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:58:17,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587929296] [2019-11-23 22:58:17,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:58:17,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:17,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:58:17,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:17,643 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-11-23 22:58:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:17,752 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2019-11-23 22:58:17,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:58:17,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:58:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:17,765 INFO L225 Difference]: With dead ends: 37 [2019-11-23 22:58:17,765 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:58:17,768 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 22:58:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:58:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:58:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:58:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 45 transitions. [2019-11-23 22:58:17,810 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 45 transitions. Word has length 15 [2019-11-23 22:58:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:17,812 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 45 transitions. [2019-11-23 22:58:17,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:58:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 45 transitions. [2019-11-23 22:58:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:58:17,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:17,815 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:17,816 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:17,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:17,816 INFO L82 PathProgramCache]: Analyzing trace with hash 904916989, now seen corresponding path program 1 times [2019-11-23 22:58:17,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:17,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799639439] [2019-11-23 22:58:17,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:17,903 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 22:58:17,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799639439] [2019-11-23 22:58:17,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:17,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:58:17,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119781379] [2019-11-23 22:58:17,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:58:17,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:58:17,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:58:17,907 INFO L87 Difference]: Start difference. First operand 26 states and 45 transitions. Second operand 3 states. [2019-11-23 22:58:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:17,967 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2019-11-23 22:58:17,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:58:17,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-23 22:58:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:17,969 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:58:17,969 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:58:17,971 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 22:58:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:58:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:58:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:58:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 46 transitions. [2019-11-23 22:58:17,979 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 46 transitions. Word has length 16 [2019-11-23 22:58:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:17,979 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 46 transitions. [2019-11-23 22:58:17,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:58:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 46 transitions. [2019-11-23 22:58:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:58:17,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:17,981 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:17,981 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:17,982 INFO L82 PathProgramCache]: Analyzing trace with hash 178717679, now seen corresponding path program 1 times [2019-11-23 22:58:17,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:17,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365208928] [2019-11-23 22:58:17,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:18,036 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 22:58:18,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365208928] [2019-11-23 22:58:18,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:18,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:58:18,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516227519] [2019-11-23 22:58:18,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:58:18,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:18,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:58:18,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:18,039 INFO L87 Difference]: Start difference. First operand 27 states and 46 transitions. Second operand 4 states. [2019-11-23 22:58:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:18,160 INFO L93 Difference]: Finished difference Result 48 states and 84 transitions. [2019-11-23 22:58:18,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:58:18,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 22:58:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:18,163 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:58:18,163 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:58:18,164 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 22:58:18,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:58:18,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:58:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:58:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-23 22:58:18,171 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-23 22:58:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:18,171 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-23 22:58:18,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:58:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-23 22:58:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:58:18,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:18,173 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, 1, 1, 1, 1] [2019-11-23 22:58:18,173 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash -854665082, now seen corresponding path program 1 times [2019-11-23 22:58:18,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:18,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499650749] [2019-11-23 22:58:18,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:58:18,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499650749] [2019-11-23 22:58:18,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727040474] [2019-11-23 22:58:18,246 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 22:58:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:18,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:58:18,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:58:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:58:18,368 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:58:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:58:18,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1110899309] [2019-11-23 22:58:18,429 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-23 22:58:18,429 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:58:18,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:58:18,448 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:58:18,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:58:20,101 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 129 [2019-11-23 22:58:20,461 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 133 [2019-11-23 22:58:38,033 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2019-11-23 22:58:39,835 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2019-11-23 22:58:39,961 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 232 [2019-11-23 22:58:51,946 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 266 [2019-11-23 22:58:52,100 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2019-11-23 22:58:52,238 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 270 [2019-11-23 22:59:00,168 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2019-11-23 22:59:00,398 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 283 [2019-11-23 22:59:08,141 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 297 [2019-11-23 22:59:12,243 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 304 [2019-11-23 22:59:18,493 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2019-11-23 22:59:18,603 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 315 [2019-11-23 22:59:20,698 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 323 [2019-11-23 22:59:20,827 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 317 [2019-11-23 22:59:21,062 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 319 [2019-11-23 22:59:21,306 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 319 [2019-11-23 22:59:23,787 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 324 [2019-11-23 22:59:26,023 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 328 [2019-11-23 22:59:28,612 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 334 [2019-11-23 22:59:28,728 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 331 [2019-11-23 22:59:31,195 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 337 [2019-11-23 22:59:31,476 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 334 [2019-11-23 22:59:34,468 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 338 [2019-11-23 22:59:36,915 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2019-11-23 22:59:37,041 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 342 [2019-11-23 22:59:39,547 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-23 22:59:39,688 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 347 [2019-11-23 22:59:42,105 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 353 [2019-11-23 22:59:42,242 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 350 [2019-11-23 22:59:44,852 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2019-11-23 22:59:44,983 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 352