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/Problem02_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:56:31,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:56:31,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:56:31,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:56:31,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:56:31,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:56:31,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:56:31,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:56:31,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:56:31,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:56:31,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:56:31,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:56:31,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:56:31,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:56:31,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:56:31,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:56:31,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:56:31,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:56:31,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:56:31,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:56:31,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:56:31,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:56:31,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:56:31,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:56:31,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:56:31,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:56:31,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:56:31,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:56:31,611 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 [2019-10-14 23:56:31,643 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:56:31,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:56:31,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:56:31,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:56:31,647 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:56:31,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:56:31,648 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:56:31,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:56:31,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:56:31,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:56:31,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:56:31,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:56:31,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:56:31,649 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:56:31,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:56:31,650 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:56:31,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:56:31,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:56:31,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:56:31,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:56:31,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:56:31,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:56:31,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:56:31,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:56:31,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:56:31,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:56:31,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:56:31,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:56:31,654 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 [2019-10-14 23:56:31,961 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:56:31,981 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:56:31,985 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:56:31,987 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:56:31,987 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:56:31,988 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label28.c [2019-10-14 23:56:32,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/451e22074/4faa407158f04f5183c2b28bf8b5e358/FLAGe21f9db07 [2019-10-14 23:56:32,569 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:56:32,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label28.c [2019-10-14 23:56:32,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/451e22074/4faa407158f04f5183c2b28bf8b5e358/FLAGe21f9db07 [2019-10-14 23:56:32,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/451e22074/4faa407158f04f5183c2b28bf8b5e358 [2019-10-14 23:56:32,925 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:56:32,926 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:56:32,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:32,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:56:32,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:56:32,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:32" (1/1) ... [2019-10-14 23:56:32,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:32, skipping insertion in model container [2019-10-14 23:56:32,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:32" (1/1) ... [2019-10-14 23:56:32,946 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:56:33,004 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:56:33,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:33,536 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:56:33,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:33,671 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:56:33,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:33 WrapperNode [2019-10-14 23:56:33,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:33,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:56:33,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:56:33,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:56:33,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:33" (1/1) ... [2019-10-14 23:56:33,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:33" (1/1) ... [2019-10-14 23:56:33,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:33" (1/1) ... [2019-10-14 23:56:33,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:33" (1/1) ... [2019-10-14 23:56:33,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:33" (1/1) ... [2019-10-14 23:56:33,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:33" (1/1) ... [2019-10-14 23:56:33,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:33" (1/1) ... [2019-10-14 23:56:33,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:56:33,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:56:33,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:56:33,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:56:33,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:33" (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 [2019-10-14 23:56:33,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:56:33,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:56:33,824 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:56:33,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:56:33,824 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:56:33,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:56:33,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:56:33,825 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:56:33,825 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:56:33,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:56:33,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:56:34,952 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:56:34,953 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:56:34,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:34 BoogieIcfgContainer [2019-10-14 23:56:34,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:56:34,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:56:34,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:56:34,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:56:34,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:32" (1/3) ... [2019-10-14 23:56:34,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10afa6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:34, skipping insertion in model container [2019-10-14 23:56:34,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:33" (2/3) ... [2019-10-14 23:56:34,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10afa6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:34, skipping insertion in model container [2019-10-14 23:56:34,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:34" (3/3) ... [2019-10-14 23:56:34,970 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label28.c [2019-10-14 23:56:34,983 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:56:34,992 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:56:35,003 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:56:35,036 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:56:35,037 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:56:35,037 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:56:35,037 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:56:35,037 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:56:35,037 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:56:35,038 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:56:35,038 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:56:35,072 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:56:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 23:56:35,092 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:35,093 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, 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] [2019-10-14 23:56:35,095 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:35,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:35,099 INFO L82 PathProgramCache]: Analyzing trace with hash 619051294, now seen corresponding path program 1 times [2019-10-14 23:56:35,106 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:35,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720382930] [2019-10-14 23:56:35,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:35,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:35,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:35,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720382930] [2019-10-14 23:56:35,589 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:35,589 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:35,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266485376] [2019-10-14 23:56:35,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:35,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:35,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:35,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:35,614 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:56:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:36,686 INFO L93 Difference]: Finished difference Result 615 states and 1053 transitions. [2019-10-14 23:56:36,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:36,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2019-10-14 23:56:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:36,706 INFO L225 Difference]: With dead ends: 615 [2019-10-14 23:56:36,707 INFO L226 Difference]: Without dead ends: 317 [2019-10-14 23:56:36,713 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2019-10-14 23:56:36,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2019-10-14 23:56:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-14 23:56:36,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 478 transitions. [2019-10-14 23:56:36,788 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 478 transitions. Word has length 130 [2019-10-14 23:56:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:36,789 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 478 transitions. [2019-10-14 23:56:36,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 478 transitions. [2019-10-14 23:56:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-14 23:56:36,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:36,795 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:36,795 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:36,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1219362173, now seen corresponding path program 1 times [2019-10-14 23:56:36,796 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:36,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706006869] [2019-10-14 23:56:36,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:36,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:36,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:36,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706006869] [2019-10-14 23:56:36,945 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:36,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:56:36,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218795032] [2019-10-14 23:56:36,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:56:36,947 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:36,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:56:36,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:56:36,948 INFO L87 Difference]: Start difference. First operand 317 states and 478 transitions. Second operand 6 states. [2019-10-14 23:56:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:37,797 INFO L93 Difference]: Finished difference Result 962 states and 1500 transitions. [2019-10-14 23:56:37,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:56:37,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-10-14 23:56:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:37,818 INFO L225 Difference]: With dead ends: 962 [2019-10-14 23:56:37,818 INFO L226 Difference]: Without dead ends: 651 [2019-10-14 23:56:37,820 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:56:37,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-14 23:56:37,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 625. [2019-10-14 23:56:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-10-14 23:56:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 924 transitions. [2019-10-14 23:56:37,897 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 924 transitions. Word has length 145 [2019-10-14 23:56:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:37,897 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 924 transitions. [2019-10-14 23:56:37,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:56:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 924 transitions. [2019-10-14 23:56:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 23:56:37,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:37,902 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:37,903 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:37,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1862479560, now seen corresponding path program 1 times [2019-10-14 23:56:37,903 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:37,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231098180] [2019-10-14 23:56:37,904 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:37,904 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:37,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:56:38,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231098180] [2019-10-14 23:56:38,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720910738] [2019-10-14 23:56:38,013 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 [2019-10-14 23:56:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:38,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:38,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:38,223 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:38,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1171738947] [2019-10-14 23:56:38,324 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 154 [2019-10-14 23:56:38,371 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:56:38,371 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)