/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_sum4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:56:34,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:56:34,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:56:34,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:56:34,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:56:34,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:56:34,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:56:34,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:56:34,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:56:34,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:56:34,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:56:34,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:56:34,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:56:34,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:56:34,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:56:34,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:56:34,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:56:34,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:56:34,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:56:34,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:56:34,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:56:34,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:56:34,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:56:34,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:56:34,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 22:56:34,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 22:56:34,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 22:56:34,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 22:56:34,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 22:56:34,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 22:56:34,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:56:34,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:56:34,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:56:34,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:56:34,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:56:34,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:56:34,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:56:34,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:56:34,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:56:34,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:56:34,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:56:34,595 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 22:56:34,615 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:56:34,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:56:34,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:56:34,616 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:56:34,616 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:56:34,617 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:56:34,617 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:56:34,617 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:56:34,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:56:34,617 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:56:34,618 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:56:34,619 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:56:34,619 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:56:34,619 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:56:34,619 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:56:34,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:56:34,621 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:56:34,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:56:34,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:56:34,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:56:34,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:56:34,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:56:34,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:56:34,622 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:56:34,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:56:34,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:56:34,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:56:34,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:56:34,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:56:34,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:56:34,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:56:34,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:56:34,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:56:34,625 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:56:34,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:56:34,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:56:34,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:56:34,626 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:56:34,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:56:34,902 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:56:34,906 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:56:34,907 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:56:34,907 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:56:34,908 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum4.c [2019-11-23 22:56:34,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/360fb0d62/7c7f7fd221874b2d92545ec42f41c1ca/FLAG7ef87a511 [2019-11-23 22:56:35,434 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:56:35,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum4.c [2019-11-23 22:56:35,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/360fb0d62/7c7f7fd221874b2d92545ec42f41c1ca/FLAG7ef87a511 [2019-11-23 22:56:35,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/360fb0d62/7c7f7fd221874b2d92545ec42f41c1ca [2019-11-23 22:56:35,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:56:35,840 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:56:35,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:56:35,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:56:35,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:56:35,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67690949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35, skipping insertion in model container [2019-11-23 22:56:35,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:56:35,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:56:36,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:56:36,131 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:56:36,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:56:36,206 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:56:36,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36 WrapperNode [2019-11-23 22:56:36,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:56:36,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:56:36,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:56:36,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:56:36,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (1/1) ... [2019-11-23 22:56:36,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (1/1) ... [2019-11-23 22:56:36,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:56:36,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:56:36,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:56:36,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:56:36,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (1/1) ... [2019-11-23 22:56:36,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (1/1) ... [2019-11-23 22:56:36,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (1/1) ... [2019-11-23 22:56:36,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (1/1) ... [2019-11-23 22:56:36,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (1/1) ... [2019-11-23 22:56:36,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (1/1) ... [2019-11-23 22:56:36,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (1/1) ... [2019-11-23 22:56:36,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:56:36,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:56:36,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:56:36,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:56:36,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (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 22:56:36,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:56:36,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:56:36,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:56:36,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:56:36,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:56:36,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:56:36,987 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:56:36,987 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:56:36,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:56:36 BoogieIcfgContainer [2019-11-23 22:56:36,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:56:36,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:56:36,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:56:36,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:56:36,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:56:35" (1/3) ... [2019-11-23 22:56:36,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444ac411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:56:36, skipping insertion in model container [2019-11-23 22:56:36,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:36" (2/3) ... [2019-11-23 22:56:36,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444ac411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:56:36, skipping insertion in model container [2019-11-23 22:56:36,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:56:36" (3/3) ... [2019-11-23 22:56:36,997 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2019-11-23 22:56:37,012 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:56:37,022 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:56:37,034 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:56:37,063 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:56:37,064 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:56:37,064 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:56:37,064 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:56:37,064 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:56:37,065 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:56:37,065 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:56:37,065 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:56:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-23 22:56:37,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:56:37,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:37,093 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:37,093 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:37,101 INFO L82 PathProgramCache]: Analyzing trace with hash 493697276, now seen corresponding path program 1 times [2019-11-23 22:56:37,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:37,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645282394] [2019-11-23 22:56:37,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:37,314 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 22:56:37,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645282394] [2019-11-23 22:56:37,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:37,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:56:37,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346392424] [2019-11-23 22:56:37,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:56:37,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:37,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:56:37,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:37,340 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2019-11-23 22:56:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:37,428 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2019-11-23 22:56:37,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:56:37,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 22:56:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:37,440 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:56:37,440 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:56:37,443 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 22:56:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:56:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 22:56:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:56:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 37 transitions. [2019-11-23 22:56:37,481 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 37 transitions. Word has length 13 [2019-11-23 22:56:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:37,482 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 37 transitions. [2019-11-23 22:56:37,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:56:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 37 transitions. [2019-11-23 22:56:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:56:37,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:37,483 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:37,483 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:37,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1876918952, now seen corresponding path program 1 times [2019-11-23 22:56:37,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:37,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610884570] [2019-11-23 22:56:37,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:37,567 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 22:56:37,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610884570] [2019-11-23 22:56:37,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:37,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:56:37,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241146289] [2019-11-23 22:56:37,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:56:37,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:37,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:56:37,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:56:37,571 INFO L87 Difference]: Start difference. First operand 22 states and 37 transitions. Second operand 3 states. [2019-11-23 22:56:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:37,634 INFO L93 Difference]: Finished difference Result 42 states and 72 transitions. [2019-11-23 22:56:37,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:56:37,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 22:56:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:37,636 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:56:37,636 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:56:37,638 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 22:56:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:56:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:56:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:56:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 38 transitions. [2019-11-23 22:56:37,647 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 38 transitions. Word has length 14 [2019-11-23 22:56:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:37,647 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 38 transitions. [2019-11-23 22:56:37,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:56:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 38 transitions. [2019-11-23 22:56:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:56:37,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:37,655 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:37,655 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash -696142449, now seen corresponding path program 1 times [2019-11-23 22:56:37,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:37,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226005013] [2019-11-23 22:56:37,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:37,736 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 22:56:37,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226005013] [2019-11-23 22:56:37,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:37,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:56:37,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387071891] [2019-11-23 22:56:37,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:56:37,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:37,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:56:37,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:37,739 INFO L87 Difference]: Start difference. First operand 23 states and 38 transitions. Second operand 4 states. [2019-11-23 22:56:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:37,819 INFO L93 Difference]: Finished difference Result 40 states and 68 transitions. [2019-11-23 22:56:37,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:56:37,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:56:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:37,821 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:56:37,821 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:56:37,822 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 22:56:37,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:56:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:56:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:56:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-23 22:56:37,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 15 [2019-11-23 22:56:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:37,829 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-23 22:56:37,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:56:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-23 22:56:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:56:37,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:37,831 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] [2019-11-23 22:56:37,831 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:37,831 INFO L82 PathProgramCache]: Analyzing trace with hash -966271019, now seen corresponding path program 1 times [2019-11-23 22:56:37,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:37,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060781362] [2019-11-23 22:56:37,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:56:37,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060781362] [2019-11-23 22:56:37,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455497208] [2019-11-23 22:56:37,925 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 22:56:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:37,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:56:38,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:56:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:56:38,048 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:56:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:56:38,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135301282] [2019-11-23 22:56:38,099 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-23 22:56:38,099 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:56:38,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:56:38,113 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:56:38,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:56:39,763 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 126 [2019-11-23 22:56:51,091 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 184 [2019-11-23 22:56:51,351 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 186 [2019-11-23 22:57:06,280 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2019-11-23 22:57:32,864 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-23 22:57:35,017 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 302 [2019-11-23 22:57:38,964 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 307 [2019-11-23 22:57:39,182 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 310 [2019-11-23 22:57:41,554 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-23 22:57:41,736 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 312 [2019-11-23 22:57:41,887 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-23 22:57:44,424 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-23 22:57:44,745 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 316 [2019-11-23 22:57:44,991 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2019-11-23 22:57:45,156 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 317 [2019-11-23 22:57:45,303 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2019-11-23 22:57:47,645 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 325 [2019-11-23 22:57:50,175 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 328 [2019-11-23 22:57:52,629 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 332 [2019-11-23 22:57:55,135 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 336 [2019-11-23 22:57:57,480 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 22:57:57,593 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 340 [2019-11-23 22:57:59,984 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 347 [2019-11-23 22:58:00,108 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 342 [2019-11-23 22:58:02,745 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 352 [2019-11-23 22:58:02,857 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 348 [2019-11-23 22:58:05,417 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 22:58:05,526 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 351 [2019-11-23 22:58:08,110 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2019-11-23 22:58:08,227 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 354