/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/seq-pthread/cs_dekker.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:59:23,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:59:23,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:59:23,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:59:23,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:59:23,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:59:23,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:59:23,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:59:23,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:59:23,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:59:23,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:59:23,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:59:23,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:59:23,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:59:23,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:59:23,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:59:23,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:59:23,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:59:23,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:59:23,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:59:23,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:59:23,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:59:23,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:59:23,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:59:23,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:59:23,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:59:23,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:59:23,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:59:23,391 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 05:59:23,419 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:59:23,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:59:23,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:59:23,420 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:59:23,421 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:59:23,421 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:59:23,421 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:59:23,422 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:59:23,422 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:59:23,422 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:59:23,423 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:59:23,423 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:59:23,424 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:59:23,424 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:59:23,424 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:59:23,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:59:23,425 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:59:23,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:59:23,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:59:23,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:59:23,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:59:23,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:59:23,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:59:23,430 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:59:23,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:59:23,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:59:23,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:59:23,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:59:23,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:59:23,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:59:23,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:59:23,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:59:23,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:59:23,434 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:59:23,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:59:23,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:59:23,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:59:23,436 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:59:23,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:59:23,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:59:23,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:59:23,799 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:59:23,799 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:59:23,800 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_dekker.i [2019-11-24 05:59:23,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86ab3d5b7/2dfd09f6be814aba86cc2a1e27cc241e/FLAG3754e8e73 [2019-11-24 05:59:24,442 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:59:24,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_dekker.i [2019-11-24 05:59:24,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86ab3d5b7/2dfd09f6be814aba86cc2a1e27cc241e/FLAG3754e8e73 [2019-11-24 05:59:24,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86ab3d5b7/2dfd09f6be814aba86cc2a1e27cc241e [2019-11-24 05:59:24,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:59:24,727 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:59:24,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:59:24,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:59:24,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:59:24,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:59:24" (1/1) ... [2019-11-24 05:59:24,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336c0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:24, skipping insertion in model container [2019-11-24 05:59:24,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:59:24" (1/1) ... [2019-11-24 05:59:24,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:59:24,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:59:25,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:59:25,379 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:59:25,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:59:25,619 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:59:25,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25 WrapperNode [2019-11-24 05:59:25,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:59:25,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:59:25,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:59:25,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:59:25,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (1/1) ... [2019-11-24 05:59:25,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (1/1) ... [2019-11-24 05:59:25,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:59:25,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:59:25,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:59:25,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:59:25,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (1/1) ... [2019-11-24 05:59:25,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (1/1) ... [2019-11-24 05:59:25,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (1/1) ... [2019-11-24 05:59:25,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (1/1) ... [2019-11-24 05:59:25,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (1/1) ... [2019-11-24 05:59:25,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (1/1) ... [2019-11-24 05:59:25,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (1/1) ... [2019-11-24 05:59:25,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:59:25,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:59:25,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:59:25,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:59:25,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (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 05:59:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:59:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:59:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 05:59:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:59:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 05:59:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:59:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 05:59:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:59:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:59:25,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:00:48,399 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:00:48,399 INFO L284 CfgBuilder]: Removed 86 assume(true) statements. [2019-11-24 06:00:48,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:00:48 BoogieIcfgContainer [2019-11-24 06:00:48,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:00:48,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:00:48,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:00:48,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:00:48,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:59:24" (1/3) ... [2019-11-24 06:00:48,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368ae0bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:00:48, skipping insertion in model container [2019-11-24 06:00:48,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:59:25" (2/3) ... [2019-11-24 06:00:48,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368ae0bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:00:48, skipping insertion in model container [2019-11-24 06:00:48,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:00:48" (3/3) ... [2019-11-24 06:00:48,408 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_dekker.i [2019-11-24 06:00:48,417 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:00:48,424 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:00:48,435 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:00:48,457 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:00:48,458 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:00:48,458 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:00:48,458 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:00:48,458 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:00:48,458 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:00:48,459 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:00:48,459 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:00:48,471 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-11-24 06:00:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 06:00:48,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:00:48,477 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 06:00:48,477 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:00:48,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:00:48,483 INFO L82 PathProgramCache]: Analyzing trace with hash 18054227, now seen corresponding path program 1 times [2019-11-24 06:00:48,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:00:48,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108394435] [2019-11-24 06:00:48,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:00:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:07,053 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 06:01:07,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108394435] [2019-11-24 06:01:07,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:07,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:07,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151255653] [2019-11-24 06:01:07,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:07,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:07,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:07,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:07,078 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-11-24 06:01:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:09,239 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-11-24 06:01:09,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:09,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-24 06:01:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:09,251 INFO L225 Difference]: With dead ends: 15 [2019-11-24 06:01:09,251 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 06:01:09,256 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 [2019-11-24 06:01:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 06:01:09,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-11-24 06:01:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 06:01:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-11-24 06:01:09,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2019-11-24 06:01:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:09,294 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-24 06:01:09,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-11-24 06:01:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 06:01:09,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:09,294 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 06:01:09,295 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:09,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:09,295 INFO L82 PathProgramCache]: Analyzing trace with hash -518655733, now seen corresponding path program 1 times [2019-11-24 06:01:09,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:09,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967653446] [2019-11-24 06:01:09,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat