/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-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:17:28,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:17:28,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:17:28,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:17:28,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:17:28,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:17:28,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:17:28,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:17:28,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:17:28,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:17:28,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:17:28,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:17:28,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:17:28,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:17:28,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:17:28,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:17:28,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:17:28,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:17:28,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:17:28,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:17:28,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:17:28,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:17:28,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:17:28,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:17:28,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:17:28,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:17:28,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:17:28,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:17:28,527 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 23:17:28,551 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:17:28,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:17:28,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:17:28,552 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:17:28,552 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:17:28,553 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:17:28,553 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:17:28,553 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:17:28,553 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:17:28,553 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:17:28,555 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:17:28,555 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:17:28,555 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:17:28,556 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:17:28,556 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:17:28,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:17:28,557 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:17:28,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:17:28,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:17:28,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:17:28,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:17:28,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:17:28,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:17:28,559 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:17:28,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:17:28,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:17:28,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:17:28,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:17:28,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:17:28,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:17:28,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:17:28,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:17:28,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:17:28,562 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:17:28,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:17:28,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:17:28,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:17:28,563 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:17:28,853 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:17:28,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:17:28,870 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:17:28,871 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:17:28,872 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:17:28,872 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2019-11-23 23:17:28,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6cfdb73/d67ce4ae05214982b8704e4409a28e43/FLAG0a03977b1 [2019-11-23 23:17:29,374 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:17:29,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2019-11-23 23:17:29,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6cfdb73/d67ce4ae05214982b8704e4409a28e43/FLAG0a03977b1 [2019-11-23 23:17:29,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6cfdb73/d67ce4ae05214982b8704e4409a28e43 [2019-11-23 23:17:29,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:17:29,823 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:17:29,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:17:29,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:17:29,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:17:29,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:29" (1/1) ... [2019-11-23 23:17:29,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4100d7fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:29, skipping insertion in model container [2019-11-23 23:17:29,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:29" (1/1) ... [2019-11-23 23:17:29,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:17:29,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:17:30,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:17:30,061 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:17:30,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:17:30,093 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:17:30,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30 WrapperNode [2019-11-23 23:17:30,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:17:30,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:17:30,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:17:30,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:17:30,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (1/1) ... [2019-11-23 23:17:30,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (1/1) ... [2019-11-23 23:17:30,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:17:30,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:17:30,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:17:30,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:17:30,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (1/1) ... [2019-11-23 23:17:30,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (1/1) ... [2019-11-23 23:17:30,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (1/1) ... [2019-11-23 23:17:30,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (1/1) ... [2019-11-23 23:17:30,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (1/1) ... [2019-11-23 23:17:30,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (1/1) ... [2019-11-23 23:17:30,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (1/1) ... [2019-11-23 23:17:30,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:17:30,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:17:30,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:17:30,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:17:30,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (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 23:17:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-23 23:17:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 23:17:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:17:30,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:17:30,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:17:30,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-23 23:17:30,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:17:30,732 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:17:30,732 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 23:17:30,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:30 BoogieIcfgContainer [2019-11-23 23:17:30,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:17:30,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:17:30,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:17:30,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:17:30,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:17:29" (1/3) ... [2019-11-23 23:17:30,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a15cc03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:30, skipping insertion in model container [2019-11-23 23:17:30,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:30" (2/3) ... [2019-11-23 23:17:30,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a15cc03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:30, skipping insertion in model container [2019-11-23 23:17:30,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:30" (3/3) ... [2019-11-23 23:17:30,742 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2019-11-23 23:17:30,751 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:17:30,759 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:17:30,767 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:17:30,789 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:17:30,789 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:17:30,789 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:17:30,789 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:17:30,790 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:17:30,790 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:17:30,790 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:17:30,790 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:17:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 23:17:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:17:30,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:30,808 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:17:30,808 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:30,815 INFO L82 PathProgramCache]: Analyzing trace with hash 30397668, now seen corresponding path program 1 times [2019-11-23 23:17:30,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:30,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038174191] [2019-11-23 23:17:30,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:30,977 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 23:17:30,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038174191] [2019-11-23 23:17:30,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:17:30,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:17:30,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373082959] [2019-11-23 23:17:30,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:17:30,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:17:30,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:17:31,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:17:31,003 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 23:17:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:17:31,059 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2019-11-23 23:17:31,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:17:31,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:17:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:17:31,072 INFO L225 Difference]: With dead ends: 27 [2019-11-23 23:17:31,072 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:17:31,078 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 23:17:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:17:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 11. [2019-11-23 23:17:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 23:17:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2019-11-23 23:17:31,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2019-11-23 23:17:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:17:31,126 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2019-11-23 23:17:31,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:17:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2019-11-23 23:17:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:17:31,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:31,128 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:17:31,129 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 915453332, now seen corresponding path program 1 times [2019-11-23 23:17:31,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:31,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283920346] [2019-11-23 23:17:31,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:31,187 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 23:17:31,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283920346] [2019-11-23 23:17:31,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:17:31,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:17:31,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384686610] [2019-11-23 23:17:31,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:17:31,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:17:31,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:17:31,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:17:31,192 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 3 states. [2019-11-23 23:17:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:17:31,201 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2019-11-23 23:17:31,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:17:31,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:17:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:17:31,203 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:17:31,203 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:17:31,204 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 23:17:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:17:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:17:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:17:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-23 23:17:31,209 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2019-11-23 23:17:31,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:17:31,209 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-23 23:17:31,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:17:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-23 23:17:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:17:31,210 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:31,211 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:17:31,211 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:31,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1621385429, now seen corresponding path program 1 times [2019-11-23 23:17:31,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:31,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233696355] [2019-11-23 23:17:31,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:17:31,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233696355] [2019-11-23 23:17:31,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040866514] [2019-11-23 23:17:31,309 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 23:17:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:31,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 23:17:31,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:17:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:17:31,433 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:17:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:17:31,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336753692] [2019-11-23 23:17:31,501 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:17:31,501 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:17:31,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:17:31,525 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:17:31,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:17:41,793 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-11-23 23:17:42,824 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 698 [2019-11-23 23:17:43,547 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 692 [2019-11-23 23:17:47,552 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2019-11-23 23:17:50,470 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2019-11-23 23:17:50,822 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 209 [2019-11-23 23:17:54,841 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 671 [2019-11-23 23:17:59,049 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2019-11-23 23:17:59,215 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 644 DAG size of output: 634 [2019-11-23 23:18:10,681 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 750 [2019-11-23 23:18:17,161 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2019-11-23 23:18:25,150 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 826 [2019-11-23 23:18:30,918 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 813 DAG size of output: 811 [2019-11-23 23:18:44,133 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 723 [2019-11-23 23:18:45,335 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2019-11-23 23:18:46,205 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 716 [2019-11-23 23:18:58,382 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 874 [2019-11-23 23:19:06,920 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 855