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_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:55:49,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:55:49,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:55:49,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:55:49,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:55:49,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:55:49,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:55:49,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:55:49,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:55:49,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:55:49,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:55:49,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:55:49,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:55:49,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:55:49,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:55:49,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:55:49,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:55:49,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:55:49,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:55:49,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:55:49,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:55:49,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:55:49,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:55:49,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:55:49,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:55:49,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:55:49,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:55:49,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:55:49,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:55:49,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:55:49,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:55:49,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:55:49,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:55:49,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:55:49,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:55:49,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:55:49,680 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 23:55:49,706 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:55:49,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:55:49,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:55:49,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:55:49,710 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:55:49,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:55:49,710 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:55:49,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:55:49,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:55:49,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:55:49,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:55:49,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:55:49,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:55:49,711 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:55:49,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:55:49,712 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:55:49,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:55:49,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:55:49,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:55:49,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:55:49,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:55:49,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:49,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:55:49,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:55:49,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:55:49,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:55:49,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:55:49,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:55:49,716 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 23:55:49,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:55:49,992 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:55:49,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:55:49,997 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:55:49,998 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:55:49,999 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label11.c [2019-10-14 23:55:50,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14dc26c63/b9cc89831ce24d2c8aaf2ca5c7522711/FLAG15e5aed4a [2019-10-14 23:55:50,662 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:55:50,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label11.c [2019-10-14 23:55:50,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14dc26c63/b9cc89831ce24d2c8aaf2ca5c7522711/FLAG15e5aed4a [2019-10-14 23:55:50,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14dc26c63/b9cc89831ce24d2c8aaf2ca5c7522711 [2019-10-14 23:55:50,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:55:50,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:55:50,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:50,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:55:50,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:55:50,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:50" (1/1) ... [2019-10-14 23:55:50,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f2c9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:50, skipping insertion in model container [2019-10-14 23:55:50,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:50" (1/1) ... [2019-10-14 23:55:50,928 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:55:50,985 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:55:51,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:51,520 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:55:51,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:51,678 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:55:51,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:51 WrapperNode [2019-10-14 23:55:51,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:51,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:55:51,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:55:51,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:55:51,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:51" (1/1) ... [2019-10-14 23:55:51,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:51" (1/1) ... [2019-10-14 23:55:51,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:51" (1/1) ... [2019-10-14 23:55:51,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:51" (1/1) ... [2019-10-14 23:55:51,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:51" (1/1) ... [2019-10-14 23:55:51,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:51" (1/1) ... [2019-10-14 23:55:51,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:51" (1/1) ... [2019-10-14 23:55:51,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:55:51,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:55:51,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:55:51,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:55:51,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:51" (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 23:55:51,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:55:51,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:55:51,845 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:55:51,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:55:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:55:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:55:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:55:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:55:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:55:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:55:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:55:53,048 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:55:53,049 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:55:53,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:53 BoogieIcfgContainer [2019-10-14 23:55:53,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:55:53,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:55:53,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:55:53,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:55:53,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:55:50" (1/3) ... [2019-10-14 23:55:53,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ab8de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:53, skipping insertion in model container [2019-10-14 23:55:53,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:51" (2/3) ... [2019-10-14 23:55:53,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ab8de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:53, skipping insertion in model container [2019-10-14 23:55:53,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:53" (3/3) ... [2019-10-14 23:55:53,058 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label11.c [2019-10-14 23:55:53,068 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:55:53,076 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:55:53,087 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:55:53,113 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:55:53,113 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:55:53,113 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:55:53,113 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:55:53,114 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:55:53,114 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:55:53,115 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:55:53,115 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:55:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:55:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 23:55:53,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:53,151 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] [2019-10-14 23:55:53,153 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:53,159 INFO L82 PathProgramCache]: Analyzing trace with hash 341704158, now seen corresponding path program 1 times [2019-10-14 23:55:53,168 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:53,168 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945690591] [2019-10-14 23:55:53,169 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:53,169 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:53,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:53,594 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 23:55:53,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945690591] [2019-10-14 23:55:53,596 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:53,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:53,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258073545] [2019-10-14 23:55:53,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:53,604 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:53,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:53,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:53,622 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:55:54,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:54,510 INFO L93 Difference]: Finished difference Result 615 states and 1053 transitions. [2019-10-14 23:55:54,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:54,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2019-10-14 23:55:54,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:54,543 INFO L225 Difference]: With dead ends: 615 [2019-10-14 23:55:54,543 INFO L226 Difference]: Without dead ends: 317 [2019-10-14 23:55:54,559 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 23:55:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2019-10-14 23:55:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2019-10-14 23:55:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-14 23:55:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 478 transitions. [2019-10-14 23:55:54,645 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 478 transitions. Word has length 114 [2019-10-14 23:55:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:54,646 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 478 transitions. [2019-10-14 23:55:54,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 478 transitions. [2019-10-14 23:55:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-14 23:55:54,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:54,651 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] [2019-10-14 23:55:54,652 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:54,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2131456323, now seen corresponding path program 1 times [2019-10-14 23:55:54,653 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:54,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186799371] [2019-10-14 23:55:54,653 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:54,653 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:54,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:54,791 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 23:55:54,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186799371] [2019-10-14 23:55:54,792 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:54,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:54,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459675886] [2019-10-14 23:55:54,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:54,795 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:54,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:54,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:54,796 INFO L87 Difference]: Start difference. First operand 317 states and 478 transitions. Second operand 6 states. [2019-10-14 23:55:55,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:55,743 INFO L93 Difference]: Finished difference Result 962 states and 1500 transitions. [2019-10-14 23:55:55,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:55:55,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-10-14 23:55:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:55,753 INFO L225 Difference]: With dead ends: 962 [2019-10-14 23:55:55,753 INFO L226 Difference]: Without dead ends: 651 [2019-10-14 23:55:55,755 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 23:55:55,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-14 23:55:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 625. [2019-10-14 23:55:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-10-14 23:55:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 924 transitions. [2019-10-14 23:55:55,814 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 924 transitions. Word has length 129 [2019-10-14 23:55:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:55,815 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 924 transitions. [2019-10-14 23:55:55,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 924 transitions. [2019-10-14 23:55:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-14 23:55:55,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:55,839 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] [2019-10-14 23:55:55,840 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1872771192, now seen corresponding path program 1 times [2019-10-14 23:55:55,840 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:55,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963204461] [2019-10-14 23:55:55,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:55,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:55,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:56,008 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 23:55:56,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963204461] [2019-10-14 23:55:56,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477340315] [2019-10-14 23:55:56,009 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 23:55:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:56,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:55:56,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:56,207 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 23:55:56,207 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:56,283 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 23:55:56,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [868106041] [2019-10-14 23:55:56,290 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 138 [2019-10-14 23:55:56,368 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:55:56,368 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)