/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_const2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:56:52,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:56:52,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:56:52,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:56:52,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:56:52,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:56:52,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:56:52,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:56:52,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:56:52,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:56:52,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:56:52,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:56:52,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:56:52,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:56:52,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:56:52,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:56:52,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:56:52,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:56:52,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:56:52,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:56:52,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:56:52,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:56:52,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:56:52,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:56:52,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:56:52,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:56:52,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:56:52,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:56:52,566 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 22:56:52,593 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:56:52,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:56:52,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:56:52,595 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:56:52,595 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:56:52,595 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:56:52,595 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:56:52,595 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:56:52,596 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:56:52,596 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:56:52,597 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:56:52,597 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:56:52,597 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:56:52,598 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:56:52,598 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:56:52,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:56:52,600 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:56:52,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:56:52,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:56:52,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:56:52,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:56:52,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:56:52,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:56:52,601 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:56:52,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:56:52,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:56:52,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:56:52,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:56:52,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:56:52,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:56:52,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:56:52,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:56:52,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:56:52,604 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:56:52,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:56:52,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:56:52,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:56:52,606 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:56:52,901 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:56:52,915 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:56:52,918 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:56:52,919 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:56:52,920 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:56:52,920 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2019-11-23 22:56:52,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/433f791c8/8ab63d680042428f93fc2b805f66d203/FLAG15be30929 [2019-11-23 22:56:53,427 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:56:53,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2019-11-23 22:56:53,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/433f791c8/8ab63d680042428f93fc2b805f66d203/FLAG15be30929 [2019-11-23 22:56:53,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/433f791c8/8ab63d680042428f93fc2b805f66d203 [2019-11-23 22:56:53,844 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:56:53,846 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:56:53,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:56:53,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:56:53,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:56:53,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:56:53" (1/1) ... [2019-11-23 22:56:53,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28d226c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:53, skipping insertion in model container [2019-11-23 22:56:53,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:56:53" (1/1) ... [2019-11-23 22:56:53,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:56:53,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:56:54,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:56:54,087 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:56:54,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:56:54,118 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:56:54,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54 WrapperNode [2019-11-23 22:56:54,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:56:54,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:56:54,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:56:54,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:56:54,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (1/1) ... [2019-11-23 22:56:54,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (1/1) ... [2019-11-23 22:56:54,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:56:54,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:56:54,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:56:54,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:56:54,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (1/1) ... [2019-11-23 22:56:54,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (1/1) ... [2019-11-23 22:56:54,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (1/1) ... [2019-11-23 22:56:54,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (1/1) ... [2019-11-23 22:56:54,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (1/1) ... [2019-11-23 22:56:54,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (1/1) ... [2019-11-23 22:56:54,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (1/1) ... [2019-11-23 22:56:54,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:56:54,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:56:54,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:56:54,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:56:54,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (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 22:56:54,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:56:54,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 22:56:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:56:54,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:56:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:56:54,751 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:56:54,752 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 22:56:54,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:56:54 BoogieIcfgContainer [2019-11-23 22:56:54,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:56:54,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:56:54,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:56:54,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:56:54,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:56:53" (1/3) ... [2019-11-23 22:56:54,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a59523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:56:54, skipping insertion in model container [2019-11-23 22:56:54,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:54" (2/3) ... [2019-11-23 22:56:54,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a59523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:56:54, skipping insertion in model container [2019-11-23 22:56:54,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:56:54" (3/3) ... [2019-11-23 22:56:54,761 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2019-11-23 22:56:54,768 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:56:54,774 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:56:54,785 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:56:54,805 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:56:54,805 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:56:54,805 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:56:54,805 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:56:54,805 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:56:54,805 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:56:54,805 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:56:54,806 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:56:54,816 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 22:56:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:56:54,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:54,823 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:54,823 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:54,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:54,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2032339455, now seen corresponding path program 1 times [2019-11-23 22:56:54,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:54,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353781063] [2019-11-23 22:56:54,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:55,017 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 22:56:55,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353781063] [2019-11-23 22:56:55,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:55,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:56:55,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706059000] [2019-11-23 22:56:55,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:56:55,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:55,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:56:55,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:55,037 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2019-11-23 22:56:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:55,114 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2019-11-23 22:56:55,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:56:55,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:56:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:55,131 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:56:55,131 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:56:55,138 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 22:56:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:56:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 22:56:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:56:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2019-11-23 22:56:55,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 9 [2019-11-23 22:56:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:55,183 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2019-11-23 22:56:55,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:56:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2019-11-23 22:56:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:56:55,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:55,185 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:55,186 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:55,186 INFO L82 PathProgramCache]: Analyzing trace with hash 308567483, now seen corresponding path program 1 times [2019-11-23 22:56:55,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:55,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713876903] [2019-11-23 22:56:55,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:55,287 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 22:56:55,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713876903] [2019-11-23 22:56:55,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:55,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:56:55,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522043292] [2019-11-23 22:56:55,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:56:55,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:55,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:56:55,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:56:55,293 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand 3 states. [2019-11-23 22:56:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:55,325 INFO L93 Difference]: Finished difference Result 26 states and 40 transitions. [2019-11-23 22:56:55,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:56:55,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 22:56:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:55,326 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:56:55,326 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:56:55,328 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 22:56:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:56:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:56:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:56:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2019-11-23 22:56:55,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 10 [2019-11-23 22:56:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:55,333 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 22 transitions. [2019-11-23 22:56:55,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:56:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 22 transitions. [2019-11-23 22:56:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:56:55,334 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:55,335 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:55,335 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:55,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1258553480, now seen corresponding path program 1 times [2019-11-23 22:56:55,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:55,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228704113] [2019-11-23 22:56:55,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:55,397 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 22:56:55,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228704113] [2019-11-23 22:56:55,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:55,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:56:55,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446064606] [2019-11-23 22:56:55,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:56:55,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:56:55,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:55,400 INFO L87 Difference]: Start difference. First operand 15 states and 22 transitions. Second operand 4 states. [2019-11-23 22:56:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:55,467 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2019-11-23 22:56:55,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:56:55,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 22:56:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:55,469 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:56:55,469 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:56:55,471 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 22:56:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:56:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:56:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:56:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-11-23 22:56:55,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 11 [2019-11-23 22:56:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:55,479 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-23 22:56:55,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:56:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2019-11-23 22:56:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:56:55,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:55,480 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:55,480 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:55,481 INFO L82 PathProgramCache]: Analyzing trace with hash -147827394, now seen corresponding path program 1 times [2019-11-23 22:56:55,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:55,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242187173] [2019-11-23 22:56:55,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:56:55,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242187173] [2019-11-23 22:56:55,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428164812] [2019-11-23 22:56:55,598 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 22:56:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:55,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:56:55,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:56:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:56:55,710 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:56:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:56:55,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1023958022] [2019-11-23 22:56:55,794 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 22:56:55,794 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:56:55,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:56:55,808 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:56:55,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:56:57,535 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 125 [2019-11-23 22:56:57,806 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-23 22:56:57,914 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 128 [2019-11-23 22:57:01,056 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 146 [2019-11-23 22:57:02,187 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 148 [2019-11-23 22:57:06,053 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 177 [2019-11-23 22:57:08,591 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-23 22:57:30,739 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 256 [2019-11-23 22:57:43,585 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 280 [2019-11-23 22:57:45,693 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 288 [2019-11-23 22:57:47,614 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 291 [2019-11-23 22:57:51,509 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 311 [2019-11-23 22:57:51,626 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 310 [2019-11-23 22:57:53,846 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 316 [2019-11-23 22:57:53,974 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 314 [2019-11-23 22:57:56,297 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2019-11-23 22:57:56,431 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 314 [2019-11-23 22:57:56,661 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 315 [2019-11-23 22:57:59,058 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2019-11-23 22:57:59,183 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 318 [2019-11-23 22:58:01,771 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 338 [2019-11-23 22:58:01,919 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 336 [2019-11-23 22:58:04,726 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 22:58:04,863 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 339 [2019-11-23 22:58:07,933 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 345 [2019-11-23 22:58:08,068 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 342 [2019-11-23 22:58:10,916 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 22:58:11,055 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 345 [2019-11-23 22:58:11,212 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 22:58:11,355 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 348 [2019-11-23 22:58:11,552 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 22:58:11,681 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 352 [2019-11-23 22:58:14,903 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2019-11-23 22:58:15,087 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 355 [2019-11-23 22:58:15,240 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2019-11-23 22:58:15,380 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 357 [2019-11-23 22:58:15,528 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-11-23 22:58:15,673 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 360 [2019-11-23 22:58:15,814 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-11-23 22:58:15,942 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-11-23 22:58:18,894 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 368 [2019-11-23 22:58:19,054 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 368 [2019-11-23 22:58:21,961 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 371 [2019-11-23 22:58:22,130 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 371 [2019-11-23 22:58:25,161 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 374 [2019-11-23 22:58:25,317 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 374