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/Problem01_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:50,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:50,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:50,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:50,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:50,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:50,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:50,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:50,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:50,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:50,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:50,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:50,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:50,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:50,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:50,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:50,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:50,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:50,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:50,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:50,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:50,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:50,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:50,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:50,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:53:50,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:50,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:50,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:50,669 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 23:53:50,705 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:50,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:50,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:50,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:50,710 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:50,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:50,711 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:50,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:50,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:50,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:50,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:50,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:50,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:50,712 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:50,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:50,712 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:50,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:50,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:50,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:50,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:50,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:50,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:50,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:50,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:50,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:50,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:50,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:50,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:50,717 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 23:53:51,011 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:51,026 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:51,029 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:51,031 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:51,031 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:51,032 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label21.c [2019-10-14 23:53:51,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e8e43ba/04c104b3376a425a9d942cf05f07bf93/FLAG9c7a91918 [2019-10-14 23:53:51,647 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:51,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label21.c [2019-10-14 23:53:51,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e8e43ba/04c104b3376a425a9d942cf05f07bf93/FLAG9c7a91918 [2019-10-14 23:53:51,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e8e43ba/04c104b3376a425a9d942cf05f07bf93 [2019-10-14 23:53:51,967 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:51,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:51,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:51,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:51,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:51,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:51" (1/1) ... [2019-10-14 23:53:51,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:51, skipping insertion in model container [2019-10-14 23:53:51,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:51" (1/1) ... [2019-10-14 23:53:51,988 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:52,049 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:52,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:52,612 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:52,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:52,724 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:52,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:52 WrapperNode [2019-10-14 23:53:52,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:52,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:52,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:52,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:52,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:52" (1/1) ... [2019-10-14 23:53:52,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:52" (1/1) ... [2019-10-14 23:53:52,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:52" (1/1) ... [2019-10-14 23:53:52,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:52" (1/1) ... [2019-10-14 23:53:52,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:52" (1/1) ... [2019-10-14 23:53:52,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:52" (1/1) ... [2019-10-14 23:53:52,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:52" (1/1) ... [2019-10-14 23:53:52,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:52,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:52,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:52,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:52,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:52" (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 23:53:52,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:52,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:52,941 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:52,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:52,942 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:52,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:52,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:52,943 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:52,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:54,229 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:54,230 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:54,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:54 BoogieIcfgContainer [2019-10-14 23:53:54,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:54,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:54,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:54,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:54,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:51" (1/3) ... [2019-10-14 23:53:54,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bc51b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:54, skipping insertion in model container [2019-10-14 23:53:54,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:52" (2/3) ... [2019-10-14 23:53:54,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bc51b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:54, skipping insertion in model container [2019-10-14 23:53:54,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:54" (3/3) ... [2019-10-14 23:53:54,240 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label21.c [2019-10-14 23:53:54,251 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:54,261 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:54,275 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:54,305 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:54,306 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:54,306 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:54,306 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:54,306 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:54,307 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:54,307 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:54,307 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 23:53:54,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:54,342 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] [2019-10-14 23:53:54,344 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:54,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1860977577, now seen corresponding path program 1 times [2019-10-14 23:53:54,359 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:54,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838802245] [2019-10-14 23:53:54,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:54,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:54,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:54,874 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 23:53:54,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838802245] [2019-10-14 23:53:54,876 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:54,877 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:54,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966664248] [2019-10-14 23:53:54,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:54,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:54,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:54,912 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:55,839 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:55,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:55,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2019-10-14 23:53:55,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:55,870 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:55,870 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:55,883 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 23:53:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-14 23:53:55,978 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 89 [2019-10-14 23:53:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:55,979 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-14 23:53:55,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-14 23:53:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 23:53:55,985 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:55,985 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:53:55,985 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:55,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:55,986 INFO L82 PathProgramCache]: Analyzing trace with hash 64410272, now seen corresponding path program 1 times [2019-10-14 23:53:55,986 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:55,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802873812] [2019-10-14 23:53:55,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:55,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:55,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:56,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802873812] [2019-10-14 23:53:56,119 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:56,119 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:56,119 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924710852] [2019-10-14 23:53:56,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:56,121 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:56,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:56,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:56,122 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-14 23:53:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:56,951 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-10-14 23:53:56,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:56,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2019-10-14 23:53:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:56,960 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:53:56,960 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:53:56,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 23:53:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:53:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-14 23:53:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-14 23:53:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-10-14 23:53:57,007 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 99 [2019-10-14 23:53:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:57,007 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-10-14 23:53:57,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-10-14 23:53:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 23:53:57,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:57,011 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:53:57,012 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash 899392414, now seen corresponding path program 1 times [2019-10-14 23:53:57,013 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:57,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989743172] [2019-10-14 23:53:57,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:57,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:57,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:57,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989743172] [2019-10-14 23:53:57,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:57,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:57,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252998206] [2019-10-14 23:53:57,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:57,176 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:57,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:57,177 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 3 states. [2019-10-14 23:53:57,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:57,712 INFO L93 Difference]: Finished difference Result 1513 states and 2159 transitions. [2019-10-14 23:53:57,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:57,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-14 23:53:57,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:57,724 INFO L225 Difference]: With dead ends: 1513 [2019-10-14 23:53:57,724 INFO L226 Difference]: Without dead ends: 963 [2019-10-14 23:53:57,726 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 23:53:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2019-10-14 23:53:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2019-10-14 23:53:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2019-10-14 23:53:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1316 transitions. [2019-10-14 23:53:57,765 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1316 transitions. Word has length 100 [2019-10-14 23:53:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:57,766 INFO L462 AbstractCegarLoop]: Abstraction has 963 states and 1316 transitions. [2019-10-14 23:53:57,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1316 transitions. [2019-10-14 23:53:57,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 23:53:57,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:57,772 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:53:57,772 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:57,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:57,773 INFO L82 PathProgramCache]: Analyzing trace with hash 973113403, now seen corresponding path program 1 times [2019-10-14 23:53:57,773 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:57,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507982256] [2019-10-14 23:53:57,774 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:57,774 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:57,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:57,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507982256] [2019-10-14 23:53:57,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015434529] [2019-10-14 23:53:57,906 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 23:53:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:58,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:53:58,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:58,129 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:58,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [702441259] [2019-10-14 23:53:58,261 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 121 [2019-10-14 23:53:58,341 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:53:58,342 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)