/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/heap-data/packet_filter.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 00:37:29,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 00:37:29,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 00:37:29,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 00:37:29,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 00:37:29,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 00:37:29,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 00:37:29,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 00:37:29,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 00:37:29,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 00:37:29,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 00:37:29,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 00:37:29,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 00:37:29,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 00:37:29,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 00:37:29,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 00:37:29,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 00:37:29,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 00:37:29,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 00:37:29,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 00:37:29,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 00:37:29,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 00:37:29,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 00:37:29,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 00:37:29,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 00:37:29,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 00:37:29,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 00:37:29,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 00:37:29,643 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 [2019-11-24 00:37:29,657 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 00:37:29,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 00:37:29,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 00:37:29,658 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 00:37:29,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 00:37:29,659 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 00:37:29,659 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 00:37:29,659 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 00:37:29,659 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 00:37:29,660 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 00:37:29,660 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 00:37:29,660 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 00:37:29,660 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 00:37:29,660 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 00:37:29,661 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 00:37:29,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 00:37:29,661 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 00:37:29,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 00:37:29,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 00:37:29,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 00:37:29,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 00:37:29,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 00:37:29,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 00:37:29,663 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 00:37:29,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 00:37:29,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 00:37:29,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 00:37:29,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 00:37:29,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 00:37:29,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 00:37:29,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 00:37:29,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 00:37:29,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 00:37:29,665 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 00:37:29,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 00:37:29,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 00:37:29,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 00:37:29,665 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 00:37:29,949 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 00:37:29,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 00:37:29,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 00:37:29,965 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 00:37:29,966 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 00:37:29,967 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/packet_filter.i [2019-11-24 00:37:30,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3e325cc/961b6a47c0e64c4d9b232b5bbebaceab/FLAG659907ab2 [2019-11-24 00:37:30,627 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 00:37:30,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-data/packet_filter.i [2019-11-24 00:37:30,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3e325cc/961b6a47c0e64c4d9b232b5bbebaceab/FLAG659907ab2 [2019-11-24 00:37:30,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3e325cc/961b6a47c0e64c4d9b232b5bbebaceab [2019-11-24 00:37:30,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 00:37:30,940 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 00:37:30,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 00:37:30,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 00:37:30,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 00:37:30,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:37:30" (1/1) ... [2019-11-24 00:37:30,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37dc48f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:30, skipping insertion in model container [2019-11-24 00:37:30,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:37:30" (1/1) ... [2019-11-24 00:37:30,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 00:37:31,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 00:37:31,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 00:37:31,468 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 00:37:31,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 00:37:31,584 INFO L208 MainTranslator]: Completed translation [2019-11-24 00:37:31,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31 WrapperNode [2019-11-24 00:37:31,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 00:37:31,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 00:37:31,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 00:37:31,586 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 00:37:31,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (1/1) ... [2019-11-24 00:37:31,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (1/1) ... [2019-11-24 00:37:31,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 00:37:31,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 00:37:31,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 00:37:31,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 00:37:31,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (1/1) ... [2019-11-24 00:37:31,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (1/1) ... [2019-11-24 00:37:31,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (1/1) ... [2019-11-24 00:37:31,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (1/1) ... [2019-11-24 00:37:31,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (1/1) ... [2019-11-24 00:37:31,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (1/1) ... [2019-11-24 00:37:31,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (1/1) ... [2019-11-24 00:37:31,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 00:37:31,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 00:37:31,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 00:37:31,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 00:37:31,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (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 [2019-11-24 00:37:31,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 00:37:31,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 00:37:31,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 00:37:31,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 00:37:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 00:37:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 00:37:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2019-11-24 00:37:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 00:37:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 00:37:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 00:37:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 00:37:31,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 00:37:56,089 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 00:37:56,090 INFO L284 CfgBuilder]: Removed 23 assume(true) statements. [2019-11-24 00:37:56,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:37:56 BoogieIcfgContainer [2019-11-24 00:37:56,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 00:37:56,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 00:37:56,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 00:37:56,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 00:37:56,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:37:30" (1/3) ... [2019-11-24 00:37:56,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2dab67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:37:56, skipping insertion in model container [2019-11-24 00:37:56,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:31" (2/3) ... [2019-11-24 00:37:56,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2dab67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:37:56, skipping insertion in model container [2019-11-24 00:37:56,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:37:56" (3/3) ... [2019-11-24 00:37:56,100 INFO L109 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2019-11-24 00:37:56,108 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 00:37:56,115 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 00:37:56,127 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 00:37:56,151 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 00:37:56,152 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 00:37:56,152 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 00:37:56,152 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 00:37:56,152 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 00:37:56,152 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 00:37:56,153 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 00:37:56,153 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 00:37:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-24 00:37:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 00:37:56,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:56,172 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 00:37:56,173 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:56,178 INFO L82 PathProgramCache]: Analyzing trace with hash -70113195, now seen corresponding path program 1 times [2019-11-24 00:37:56,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:56,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737665751] [2019-11-24 00:37:56,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:37:56,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737665751] [2019-11-24 00:37:56,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:37:56,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 00:37:56,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130065732] [2019-11-24 00:37:56,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 00:37:56,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:37:56,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 00:37:56,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 00:37:56,366 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2019-11-24 00:37:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:37:56,382 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2019-11-24 00:37:56,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 00:37:56,384 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-24 00:37:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:37:56,394 INFO L225 Difference]: With dead ends: 27 [2019-11-24 00:37:56,394 INFO L226 Difference]: Without dead ends: 14 [2019-11-24 00:37:56,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 00:37:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-24 00:37:56,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-24 00:37:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-24 00:37:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-24 00:37:56,432 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2019-11-24 00:37:56,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:37:56,432 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-24 00:37:56,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 00:37:56,432 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-24 00:37:56,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 00:37:56,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:56,433 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:37:56,434 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:56,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:56,434 INFO L82 PathProgramCache]: Analyzing trace with hash 937750381, now seen corresponding path program 1 times [2019-11-24 00:37:56,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:56,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888251516] [2019-11-24 00:37:56,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:37:56,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888251516] [2019-11-24 00:37:56,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:37:56,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 00:37:56,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408172191] [2019-11-24 00:37:56,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 00:37:56,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:37:56,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 00:37:56,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 00:37:56,551 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-24 00:37:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:37:58,665 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-11-24 00:37:58,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 00:37:58,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-24 00:37:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:37:58,668 INFO L225 Difference]: With dead ends: 33 [2019-11-24 00:37:58,668 INFO L226 Difference]: Without dead ends: 23 [2019-11-24 00:37:58,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 00:37:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-24 00:37:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-11-24 00:37:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 00:37:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-24 00:37:58,677 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2019-11-24 00:37:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:37:58,677 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-24 00:37:58,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 00:37:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-24 00:37:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 00:37:58,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:58,678 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:37:58,678 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:58,679 INFO L82 PathProgramCache]: Analyzing trace with hash -994504389, now seen corresponding path program 1 times [2019-11-24 00:37:58,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:58,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971583437] [2019-11-24 00:37:58,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:37:58,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971583437] [2019-11-24 00:37:58,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:37:58,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 00:37:58,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663903533] [2019-11-24 00:37:58,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 00:37:58,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:37:58,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 00:37:58,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 00:37:58,747 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2019-11-24 00:38:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:38:00,826 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-24 00:38:00,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 00:38:00,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 00:38:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:38:00,828 INFO L225 Difference]: With dead ends: 24 [2019-11-24 00:38:00,829 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 00:38:00,830 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 00:38:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 00:38:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 00:38:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 00:38:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-24 00:38:00,834 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2019-11-24 00:38:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:38:00,834 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-24 00:38:00,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 00:38:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-24 00:38:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 00:38:00,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:38:00,835 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:38:00,836 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:38:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:38:00,836 INFO L82 PathProgramCache]: Analyzing trace with hash -10369451, now seen corresponding path program 1 times [2019-11-24 00:38:00,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:38:00,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89968338] [2019-11-24 00:38:00,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:38:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:38:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:38:01,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89968338] [2019-11-24 00:38:01,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842366634] [2019-11-24 00:38:01,919 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 [2019-11-24 00:38:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:38:02,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-24 00:38:02,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 00:38:02,236 INFO L343 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2019-11-24 00:38:02,237 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 54 [2019-11-24 00:38:02,238 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 00:38:02,299 INFO L567 ElimStorePlain]: treesize reduction 24, result has 64.7 percent of original size [2019-11-24 00:38:02,300 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-24 00:38:02,300 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:44 [2019-11-24 00:38:02,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:38:02,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:38:02,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:38:02,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:02,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 00:38:11,323 WARN L192 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 205 DAG size of output: 200 [2019-11-24 00:38:21,969 WARN L192 SmtUtils]: Spent 10.64 s on a formula simplification. DAG size of input: 207 DAG size of output: 202 [2019-11-24 00:38:47,976 WARN L192 SmtUtils]: Spent 26.00 s on a formula simplification. DAG size of input: 203 DAG size of output: 199 [2019-11-24 00:38:51,702 WARN L192 SmtUtils]: Spent 3.72 s on a formula simplification that was a NOOP. DAG size: 203 [2019-11-24 00:38:58,930 WARN L192 SmtUtils]: Spent 7.23 s on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2019-11-24 00:39:08,399 WARN L192 SmtUtils]: Spent 9.47 s on a formula simplification. DAG size of input: 202 DAG size of output: 198