java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:06:32,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:06:32,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:06:32,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:06:32,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:06:32,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:06:32,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:06:32,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:06:32,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:06:32,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:06:32,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:06:32,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:06:32,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:06:32,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:06:32,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:06:32,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:06:32,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:06:32,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:06:32,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:06:32,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:06:32,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:06:32,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:06:32,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:06:32,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:06:32,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:06:32,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:06:32,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:06:32,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:06:32,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:06:32,648 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:06:32,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:06:32,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:06:32,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:06:32,650 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:06:32,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:06:32,650 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:06:32,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:06:32,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:06:32,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:06:32,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:06:32,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:06:32,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:06:32,652 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:06:32,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:06:32,653 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:06:32,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:06:32,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:06:32,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:06:32,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:06:32,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:06:32,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:06:32,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:06:32,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:06:32,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:06:32,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:06:32,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:06:32,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:06:32,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:06:32,946 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:06:32,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:06:32,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:06:32,971 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:06:32,972 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:06:32,973 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label10.c [2019-10-13 20:06:33,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24b1301c/36ed34987504459a8d65381723d460e7/FLAG9b828e35d [2019-10-13 20:06:33,574 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:06:33,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label10.c [2019-10-13 20:06:33,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24b1301c/36ed34987504459a8d65381723d460e7/FLAG9b828e35d [2019-10-13 20:06:33,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24b1301c/36ed34987504459a8d65381723d460e7 [2019-10-13 20:06:33,871 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:06:33,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:06:33,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:33,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:06:33,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:06:33,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:33" (1/1) ... [2019-10-13 20:06:33,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287e3a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:33, skipping insertion in model container [2019-10-13 20:06:33,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:33" (1/1) ... [2019-10-13 20:06:33,889 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:06:33,952 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:06:34,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:34,638 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:06:34,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:34,810 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:06:34,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:34 WrapperNode [2019-10-13 20:06:34,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:34,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:06:34,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:06:34,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:06:34,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:34" (1/1) ... [2019-10-13 20:06:34,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:34" (1/1) ... [2019-10-13 20:06:34,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:34" (1/1) ... [2019-10-13 20:06:34,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:34" (1/1) ... [2019-10-13 20:06:34,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:34" (1/1) ... [2019-10-13 20:06:34,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:34" (1/1) ... [2019-10-13 20:06:34,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:34" (1/1) ... [2019-10-13 20:06:34,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:06:34,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:06:34,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:06:34,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:06:34,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:34" (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 [2019-10-13 20:06:35,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:06:35,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:06:35,071 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:06:35,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:06:35,072 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:06:35,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:06:35,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:06:35,074 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:06:35,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:06:35,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:06:35,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:06:36,473 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:06:36,474 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:06:36,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:36 BoogieIcfgContainer [2019-10-13 20:06:36,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:06:36,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:06:36,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:06:36,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:06:36,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:06:33" (1/3) ... [2019-10-13 20:06:36,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33406728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:36, skipping insertion in model container [2019-10-13 20:06:36,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:34" (2/3) ... [2019-10-13 20:06:36,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33406728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:36, skipping insertion in model container [2019-10-13 20:06:36,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:36" (3/3) ... [2019-10-13 20:06:36,483 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label10.c [2019-10-13 20:06:36,493 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:06:36,502 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:06:36,513 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:06:36,542 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:06:36,542 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:06:36,542 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:06:36,542 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:06:36,543 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:06:36,543 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:06:36,543 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:06:36,543 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:06:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:06:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 20:06:36,574 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:36,576 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:36,577 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:36,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1708821435, now seen corresponding path program 1 times [2019-10-13 20:06:36,593 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:36,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734209663] [2019-10-13 20:06:36,594 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:36,594 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:36,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:36,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734209663] [2019-10-13 20:06:36,853 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:36,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:06:36,853 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285188588] [2019-10-13 20:06:36,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:06:36,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:06:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:36,877 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-13 20:06:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:38,764 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-10-13 20:06:38,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:38,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-10-13 20:06:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:38,786 INFO L225 Difference]: With dead ends: 890 [2019-10-13 20:06:38,786 INFO L226 Difference]: Without dead ends: 554 [2019-10-13 20:06:38,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-13 20:06:38,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-13 20:06:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-13 20:06:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 776 transitions. [2019-10-13 20:06:38,900 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 776 transitions. Word has length 34 [2019-10-13 20:06:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:38,900 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 776 transitions. [2019-10-13 20:06:38,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:38,901 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 776 transitions. [2019-10-13 20:06:38,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 20:06:38,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:38,910 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:38,910 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:38,910 INFO L82 PathProgramCache]: Analyzing trace with hash 491390794, now seen corresponding path program 1 times [2019-10-13 20:06:38,911 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:38,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156914571] [2019-10-13 20:06:38,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:38,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:38,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:39,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156914571] [2019-10-13 20:06:39,178 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:39,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:06:39,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109564553] [2019-10-13 20:06:39,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:06:39,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:06:39,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:39,189 INFO L87 Difference]: Start difference. First operand 554 states and 776 transitions. Second operand 4 states. [2019-10-13 20:06:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:40,970 INFO L93 Difference]: Finished difference Result 2194 states and 3133 transitions. [2019-10-13 20:06:40,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:40,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-13 20:06:40,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:40,986 INFO L225 Difference]: With dead ends: 2194 [2019-10-13 20:06:40,986 INFO L226 Difference]: Without dead ends: 1646 [2019-10-13 20:06:40,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-13 20:06:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-10-13 20:06:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-10-13 20:06:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2199 transitions. [2019-10-13 20:06:41,074 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2199 transitions. Word has length 146 [2019-10-13 20:06:41,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:41,075 INFO L462 AbstractCegarLoop]: Abstraction has 1646 states and 2199 transitions. [2019-10-13 20:06:41,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2199 transitions. [2019-10-13 20:06:41,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 20:06:41,091 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:41,091 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:41,092 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:41,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:41,092 INFO L82 PathProgramCache]: Analyzing trace with hash -404806138, now seen corresponding path program 1 times [2019-10-13 20:06:41,093 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:41,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834879269] [2019-10-13 20:06:41,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:41,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:41,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:41,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834879269] [2019-10-13 20:06:41,273 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:41,273 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:06:41,274 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388330784] [2019-10-13 20:06:41,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:06:41,275 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:41,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:06:41,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:41,275 INFO L87 Difference]: Start difference. First operand 1646 states and 2199 transitions. Second operand 4 states. [2019-10-13 20:06:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:42,719 INFO L93 Difference]: Finished difference Result 4924 states and 6909 transitions. [2019-10-13 20:06:42,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:42,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-10-13 20:06:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:42,743 INFO L225 Difference]: With dead ends: 4924 [2019-10-13 20:06:42,743 INFO L226 Difference]: Without dead ends: 3466 [2019-10-13 20:06:42,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:42,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3466 states. [2019-10-13 20:06:42,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3466 to 3466. [2019-10-13 20:06:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3466 states. [2019-10-13 20:06:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 4759 transitions. [2019-10-13 20:06:42,871 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 4759 transitions. Word has length 164 [2019-10-13 20:06:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:42,872 INFO L462 AbstractCegarLoop]: Abstraction has 3466 states and 4759 transitions. [2019-10-13 20:06:42,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:42,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 4759 transitions. [2019-10-13 20:06:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-10-13 20:06:42,883 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:42,884 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:42,884 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:42,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:42,885 INFO L82 PathProgramCache]: Analyzing trace with hash -672442673, now seen corresponding path program 1 times [2019-10-13 20:06:42,885 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:42,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511143904] [2019-10-13 20:06:42,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:42,886 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:42,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:43,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511143904] [2019-10-13 20:06:43,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709811167] [2019-10-13 20:06:43,296 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 [2019-10-13 20:06:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:43,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:06:43,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:43,598 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:43,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1719219712] [2019-10-13 20:06:43,833 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 271 [2019-10-13 20:06:43,910 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:06:43,910 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:07:00,915 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:07:00,917 INFO L272 AbstractInterpreter]: Visited 158 different actions 158 times. Never merged. Never widened. Performed 355 root evaluator evaluations with a maximum evaluation depth of 14. Performed 355 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-13 20:07:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:00,922 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:07:14,222 INFO L227 lantSequenceWeakener]: Weakened 251 states. On average, predicates are now at 77.68% of their original sizes. [2019-10-13 20:07:14,223 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:07:14,347 INFO L553 sIntCurrentIteration]: We unified 269 AI predicates to 269 [2019-10-13 20:07:14,347 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:07:14,348 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:07:14,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-10-13 20:07:14,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849223329] [2019-10-13 20:07:14,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 20:07:14,350 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:14,350 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:07:14,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 20:07:14,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:07:14,351 INFO L87 Difference]: Start difference. First operand 3466 states and 4759 transitions. Second operand 12 states.