/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_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:58:28,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:58:28,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:58:28,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:58:28,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:58:28,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:58:28,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:58:28,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:58:28,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:58:28,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:58:28,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:58:28,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:58:28,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:58:28,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:58:28,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:58:28,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:58:28,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:58:28,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:58:28,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:58:28,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:58:28,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:58:28,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:58:28,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:58:28,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:58:28,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:58:28,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:58:28,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:58:28,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:58:28,089 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 22:58:28,125 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:58:28,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:58:28,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:58:28,126 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:58:28,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:58:28,127 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:58:28,127 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:58:28,127 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:58:28,127 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:58:28,127 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:58:28,127 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:58:28,128 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:58:28,130 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:58:28,130 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:58:28,131 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:58:28,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:58:28,131 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:58:28,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:58:28,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:58:28,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:58:28,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:58:28,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:58:28,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:58:28,133 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:58:28,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:58:28,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:58:28,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:58:28,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:58:28,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:58:28,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:58:28,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:58:28,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:58:28,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:58:28,136 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:58:28,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:58:28,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:58:28,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:58:28,136 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:58:28,465 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:58:28,489 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:58:28,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:58:28,495 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:58:28,496 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:58:28,496 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2019-11-23 22:58:28,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/583ce7e12/5dc333b195784c87aeec1246265435fe/FLAGbe118ec24 [2019-11-23 22:58:29,013 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:58:29,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2019-11-23 22:58:29,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/583ce7e12/5dc333b195784c87aeec1246265435fe/FLAGbe118ec24 [2019-11-23 22:58:29,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/583ce7e12/5dc333b195784c87aeec1246265435fe [2019-11-23 22:58:29,383 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:58:29,384 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:58:29,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:58:29,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:58:29,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:58:29,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b998ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29, skipping insertion in model container [2019-11-23 22:58:29,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:58:29,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:58:29,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:58:29,622 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:58:29,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:58:29,661 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:58:29,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29 WrapperNode [2019-11-23 22:58:29,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:58:29,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:58:29,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:58:29,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:58:29,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:58:29,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:58:29,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:58:29,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:58:29,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (1/1) ... [2019-11-23 22:58:29,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:58:29,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:58:29,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:58:29,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:58:29,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (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 22:58:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:58:29,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:58:29,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:58:29,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:58:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:58:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:58:30,285 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:58:30,285 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 22:58:30,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:58:30 BoogieIcfgContainer [2019-11-23 22:58:30,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:58:30,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:58:30,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:58:30,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:58:30,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:58:29" (1/3) ... [2019-11-23 22:58:30,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ced5bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:58:30, skipping insertion in model container [2019-11-23 22:58:30,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:29" (2/3) ... [2019-11-23 22:58:30,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ced5bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:58:30, skipping insertion in model container [2019-11-23 22:58:30,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:58:30" (3/3) ... [2019-11-23 22:58:30,294 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2019-11-23 22:58:30,302 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:58:30,309 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:58:30,320 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:58:30,343 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:58:30,344 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:58:30,344 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:58:30,344 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:58:30,344 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:58:30,344 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:58:30,344 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:58:30,344 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:58:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-23 22:58:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:58:30,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:30,363 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:30,364 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1372260483, now seen corresponding path program 1 times [2019-11-23 22:58:30,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:30,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431170731] [2019-11-23 22:58:30,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:30,548 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 22:58:30,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431170731] [2019-11-23 22:58:30,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:30,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:58:30,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839917698] [2019-11-23 22:58:30,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:58:30,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:58:30,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:30,574 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2019-11-23 22:58:30,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:30,637 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2019-11-23 22:58:30,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:58:30,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:58:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:30,649 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:58:30,649 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:58:30,653 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 22:58:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:58:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 22:58:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:58:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2019-11-23 22:58:30,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 9 [2019-11-23 22:58:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:30,688 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2019-11-23 22:58:30,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:58:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2019-11-23 22:58:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:58:30,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:30,690 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:30,690 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:30,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:30,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1139495165, now seen corresponding path program 1 times [2019-11-23 22:58:30,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:30,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83049031] [2019-11-23 22:58:30,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:30,732 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 22:58:30,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83049031] [2019-11-23 22:58:30,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:30,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:58:30,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071765631] [2019-11-23 22:58:30,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:58:30,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:30,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:58:30,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:58:30,737 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand 3 states. [2019-11-23 22:58:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:30,765 INFO L93 Difference]: Finished difference Result 26 states and 40 transitions. [2019-11-23 22:58:30,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:58:30,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 22:58:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:30,767 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:58:30,767 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:58:30,768 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 22:58:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:58:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:58:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:58:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2019-11-23 22:58:30,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 10 [2019-11-23 22:58:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:30,774 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 22 transitions. [2019-11-23 22:58:30,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:58:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 22 transitions. [2019-11-23 22:58:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:58:30,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:30,775 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:30,775 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:30,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1616439401, now seen corresponding path program 1 times [2019-11-23 22:58:30,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:30,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259251602] [2019-11-23 22:58:30,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:30,835 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 22:58:30,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259251602] [2019-11-23 22:58:30,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:30,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:58:30,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709404844] [2019-11-23 22:58:30,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:58:30,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:30,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:58:30,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:30,838 INFO L87 Difference]: Start difference. First operand 15 states and 22 transitions. Second operand 4 states. [2019-11-23 22:58:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:30,907 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2019-11-23 22:58:30,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:58:30,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 22:58:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:30,910 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:58:30,910 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:58:30,911 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 22:58:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:58:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:58:30,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:58:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-11-23 22:58:30,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 11 [2019-11-23 22:58:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:30,916 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-23 22:58:30,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:58:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2019-11-23 22:58:30,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:58:30,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:30,917 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:30,917 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:30,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:30,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1751756043, now seen corresponding path program 1 times [2019-11-23 22:58:30,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:30,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652661099] [2019-11-23 22:58:30,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:30,991 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 22:58:30,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652661099] [2019-11-23 22:58:30,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761890646] [2019-11-23 22:58:30,992 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 22:58:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:31,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:58:31,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:58:31,126 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 22:58:31,126 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:58:31,150 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 22:58:31,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134865693] [2019-11-23 22:58:31,176 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 22:58:31,177 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:58:31,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:58:31,189 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:58:31,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:59:01,078 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 272 [2019-11-23 22:59:01,276 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 268 [2019-11-23 22:59:01,407 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2019-11-23 22:59:01,532 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 270 [2019-11-23 22:59:06,942 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 281 [2019-11-23 22:59:10,671 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 293 [2019-11-23 22:59:14,643 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 293 [2019-11-23 22:59:18,755 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 305 [2019-11-23 22:59:20,885 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 311 [2019-11-23 22:59:21,007 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 306 [2019-11-23 22:59:25,494 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 310 [2019-11-23 22:59:27,858 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 315 [2019-11-23 22:59:28,085 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 317 [2019-11-23 22:59:28,313 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 321 [2019-11-23 22:59:33,054 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 328 [2019-11-23 22:59:33,271 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 330 [2019-11-23 22:59:35,547 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 337 [2019-11-23 22:59:35,668 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 335 [2019-11-23 22:59:38,173 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 22:59:38,321 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 339 [2019-11-23 22:59:41,116 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2019-11-23 22:59:41,268 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 340 [2019-11-23 22:59:41,496 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 342 [2019-11-23 22:59:43,957 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-23 22:59:44,077 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 347 [2019-11-23 22:59:47,172 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2019-11-23 22:59:47,310 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 351 [2019-11-23 22:59:49,919 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 357 [2019-11-23 22:59:50,064 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 353 [2019-11-23 22:59:52,771 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2019-11-23 22:59:52,903 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 356 [2019-11-23 22:59:55,561 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 363 [2019-11-23 22:59:55,727 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 359 [2019-11-23 22:59:55,869 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-11-23 22:59:55,984 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 362 [2019-11-23 22:59:58,736 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 366 [2019-11-23 22:59:58,866 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 366