/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/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/Problem15_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:52:59,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:52:59,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:52:59,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:52:59,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:52:59,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:52:59,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:52:59,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:52:59,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:52:59,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:52:59,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:52:59,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:52:59,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:52:59,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:52:59,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:52:59,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:52:59,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:52:59,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:52:59,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:52:59,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:52:59,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:52:59,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:52:59,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:52:59,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:52:59,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:52:59,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:52:59,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:52:59,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:52:59,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:52:59,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:52:59,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:52:59,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:52:59,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:52:59,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:52:59,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:52:59,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:52:59,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:52:59,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:52:59,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:52:59,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:52:59,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:52:59,560 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 [2019-11-06 22:52:59,587 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:52:59,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:52:59,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:52:59,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:52:59,589 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:52:59,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:52:59,589 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:52:59,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:52:59,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:52:59,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:52:59,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:52:59,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:52:59,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:52:59,595 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:52:59,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:52:59,595 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:52:59,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:52:59,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:52:59,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:52:59,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:52:59,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:52:59,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:52:59,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:52:59,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:52:59,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:52:59,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:52:59,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:52:59,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:52:59,601 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 [2019-11-06 22:52:59,868 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:52:59,881 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:52:59,884 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:52:59,886 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:52:59,886 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:52:59,887 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-11-06 22:52:59,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05313701f/c22e482a13b748f6bd29bb2fb95502e2/FLAGe58cc2ff5 [2019-11-06 22:53:00,571 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:53:00,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-11-06 22:53:00,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05313701f/c22e482a13b748f6bd29bb2fb95502e2/FLAGe58cc2ff5 [2019-11-06 22:53:00,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05313701f/c22e482a13b748f6bd29bb2fb95502e2 [2019-11-06 22:53:00,770 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:53:00,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:53:00,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:00,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:53:00,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:53:00,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:00" (1/1) ... [2019-11-06 22:53:00,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2406b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00, skipping insertion in model container [2019-11-06 22:53:00,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:00" (1/1) ... [2019-11-06 22:53:00,787 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:53:00,856 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:53:01,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:01,798 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:53:02,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:02,169 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:53:02,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02 WrapperNode [2019-11-06 22:53:02,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:02,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:53:02,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:53:02,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:53:02,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2019-11-06 22:53:02,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2019-11-06 22:53:02,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2019-11-06 22:53:02,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2019-11-06 22:53:02,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2019-11-06 22:53:02,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2019-11-06 22:53:02,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2019-11-06 22:53:02,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:53:02,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:53:02,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:53:02,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:53:02,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:53:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:53:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:53:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:53:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:53:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:53:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:53:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:53:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:53:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:53:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:53:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:53:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:53:05,773 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:53:05,773 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:53:05,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:05 BoogieIcfgContainer [2019-11-06 22:53:05,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:53:05,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:53:05,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:53:05,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:53:05,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:53:00" (1/3) ... [2019-11-06 22:53:05,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65459721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:05, skipping insertion in model container [2019-11-06 22:53:05,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (2/3) ... [2019-11-06 22:53:05,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65459721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:05, skipping insertion in model container [2019-11-06 22:53:05,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:05" (3/3) ... [2019-11-06 22:53:05,784 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label35.c [2019-11-06 22:53:05,797 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:53:05,808 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:53:05,821 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:53:05,852 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:53:05,852 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:53:05,852 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:53:05,852 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:53:05,853 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:53:05,853 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:53:05,853 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:53:05,853 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:53:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 22:53:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 22:53:05,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:05,894 INFO L410 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] [2019-11-06 22:53:05,895 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1512840592, now seen corresponding path program 1 times [2019-11-06 22:53:05,911 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:05,912 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679003322] [2019-11-06 22:53:05,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:06,257 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679003322] [2019-11-06 22:53:06,258 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:06,258 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:06,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495126207] [2019-11-06 22:53:06,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:06,266 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:06,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:06,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:06,284 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-11-06 22:53:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:11,646 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-11-06 22:53:11,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:11,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-11-06 22:53:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:11,684 INFO L225 Difference]: With dead ends: 1554 [2019-11-06 22:53:11,684 INFO L226 Difference]: Without dead ends: 1036 [2019-11-06 22:53:11,692 INFO L630 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 [2019-11-06 22:53:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-11-06 22:53:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-11-06 22:53:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-11-06 22:53:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-11-06 22:53:11,786 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 42 [2019-11-06 22:53:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:11,786 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-11-06 22:53:11,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-11-06 22:53:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-06 22:53:11,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:11,793 INFO L410 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, 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] [2019-11-06 22:53:11,793 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1983802676, now seen corresponding path program 1 times [2019-11-06 22:53:11,794 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:11,794 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575978026] [2019-11-06 22:53:11,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:11,985 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575978026] [2019-11-06 22:53:11,985 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:11,985 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:11,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129724101] [2019-11-06 22:53:11,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:11,992 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:11,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:11,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:11,993 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-11-06 22:53:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:16,874 INFO L93 Difference]: Finished difference Result 2631 states and 4588 transitions. [2019-11-06 22:53:16,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:16,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2019-11-06 22:53:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:16,887 INFO L225 Difference]: With dead ends: 2631 [2019-11-06 22:53:16,887 INFO L226 Difference]: Without dead ends: 1940 [2019-11-06 22:53:16,890 INFO L630 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 [2019-11-06 22:53:16,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2019-11-06 22:53:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1937. [2019-11-06 22:53:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2019-11-06 22:53:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2945 transitions. [2019-11-06 22:53:16,962 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2945 transitions. Word has length 111 [2019-11-06 22:53:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:16,962 INFO L462 AbstractCegarLoop]: Abstraction has 1937 states and 2945 transitions. [2019-11-06 22:53:16,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2945 transitions. [2019-11-06 22:53:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 22:53:16,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:16,967 INFO L410 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, 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] [2019-11-06 22:53:16,967 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1476577176, now seen corresponding path program 1 times [2019-11-06 22:53:16,968 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:16,968 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782876304] [2019-11-06 22:53:16,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:17,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782876304] [2019-11-06 22:53:17,120 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:17,120 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:53:17,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048414352] [2019-11-06 22:53:17,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:17,122 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:17,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:53:17,123 INFO L87 Difference]: Start difference. First operand 1937 states and 2945 transitions. Second operand 5 states. [2019-11-06 22:53:21,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:21,785 INFO L93 Difference]: Finished difference Result 5802 states and 8992 transitions. [2019-11-06 22:53:21,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:53:21,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2019-11-06 22:53:21,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:21,814 INFO L225 Difference]: With dead ends: 5802 [2019-11-06 22:53:21,815 INFO L226 Difference]: Without dead ends: 3871 [2019-11-06 22:53:21,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:53:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2019-11-06 22:53:21,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3833. [2019-11-06 22:53:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3833 states. [2019-11-06 22:53:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 5156 transitions. [2019-11-06 22:53:21,982 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 5156 transitions. Word has length 128 [2019-11-06 22:53:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:21,983 INFO L462 AbstractCegarLoop]: Abstraction has 3833 states and 5156 transitions. [2019-11-06 22:53:21,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:53:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 5156 transitions. [2019-11-06 22:53:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-11-06 22:53:22,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:22,003 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:22,003 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:22,004 INFO L82 PathProgramCache]: Analyzing trace with hash -839432913, now seen corresponding path program 1 times [2019-11-06 22:53:22,004 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:22,005 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610024119] [2019-11-06 22:53:22,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:53:22,545 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610024119] [2019-11-06 22:53:22,545 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405068536] [2019-11-06 22:53:22,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:22,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:53:22,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:53:22,945 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:53:23,215 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [600096981] [2019-11-06 22:53:23,221 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 409 [2019-11-06 22:53:23,284 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:53:23,284 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:53:34,725 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:53:34,727 INFO L272 AbstractInterpreter]: Visited 206 different actions 206 times. Never merged. Never widened. Performed 451 root evaluator evaluations with a maximum evaluation depth of 14. Performed 451 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-11-06 22:53:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:34,732 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates