/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/Problem18_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:56:41,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:56:41,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:56:41,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:56:41,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:56:41,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:56:41,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:56:41,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:56:41,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:56:41,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:56:41,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:56:41,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:56:41,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:56:41,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:56:41,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:56:41,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:56:41,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:56:41,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:56:41,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:56:41,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:56:41,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:56:41,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:56:41,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:56:41,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:56:41,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:56:41,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:56:41,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:56:41,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:56:41,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:56:41,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:56:41,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:56:41,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:56:41,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:56:41,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:56:41,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:56:41,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:56:41,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:56:41,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:56:41,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:56:41,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:56:41,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:56:41,558 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 22:56:41,582 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:56:41,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:56:41,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:56:41,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:56:41,584 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:56:41,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:56:41,585 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:56:41,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:56:41,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:56:41,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:56:41,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:56:41,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:56:41,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:56:41,586 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:56:41,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:56:41,587 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:56:41,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:56:41,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:56:41,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:56:41,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:56:41,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:56:41,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:56:41,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:56:41,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:56:41,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:56:41,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:56:41,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:56:41,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:56:41,589 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 22:56:41,875 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:56:41,888 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:56:41,892 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:56:41,893 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:56:41,894 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:56:41,895 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label12.c [2019-11-06 22:56:41,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8163098d8/b81bf363825c4979982177fea7e82a83/FLAGdaf100137 [2019-11-06 22:56:42,705 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:56:42,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label12.c [2019-11-06 22:56:42,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8163098d8/b81bf363825c4979982177fea7e82a83/FLAGdaf100137 [2019-11-06 22:56:42,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8163098d8/b81bf363825c4979982177fea7e82a83 [2019-11-06 22:56:42,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:56:42,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:56:42,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:42,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:56:42,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:56:42,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:42" (1/1) ... [2019-11-06 22:56:42,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da2c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:42, skipping insertion in model container [2019-11-06 22:56:42,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:42" (1/1) ... [2019-11-06 22:56:42,867 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:56:42,998 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:56:44,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:44,250 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:56:44,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:44,723 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:56:44,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44 WrapperNode [2019-11-06 22:56:44,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:44,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:56:44,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:56:44,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:56:44,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2019-11-06 22:56:44,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2019-11-06 22:56:44,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2019-11-06 22:56:44,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2019-11-06 22:56:44,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2019-11-06 22:56:44,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2019-11-06 22:56:44,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2019-11-06 22:56:45,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:56:45,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:56:45,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:56:45,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:56:45,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (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 22:56:45,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:56:45,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:56:45,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:56:45,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:56:45,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:56:45,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:56:45,068 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:56:45,068 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:56:45,069 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:56:45,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:56:45,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:56:45,069 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:56:45,070 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:56:45,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:56:45,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:56:48,696 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:56:48,699 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:56:48,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:48 BoogieIcfgContainer [2019-11-06 22:56:48,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:56:48,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:56:48,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:56:48,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:56:48,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:42" (1/3) ... [2019-11-06 22:56:48,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@943aec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:48, skipping insertion in model container [2019-11-06 22:56:48,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (2/3) ... [2019-11-06 22:56:48,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@943aec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:48, skipping insertion in model container [2019-11-06 22:56:48,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:48" (3/3) ... [2019-11-06 22:56:48,717 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label12.c [2019-11-06 22:56:48,731 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:56:48,740 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:56:48,754 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:56:48,798 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:56:48,798 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:56:48,798 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:56:48,798 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:56:48,799 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:56:48,799 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:56:48,799 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:56:48,799 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:56:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:56:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 22:56:48,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:48,850 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] [2019-11-06 22:56:48,852 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:48,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1916525318, now seen corresponding path program 1 times [2019-11-06 22:56:48,868 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:48,869 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236656643] [2019-11-06 22:56:48,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:49,214 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 22:56:49,215 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236656643] [2019-11-06 22:56:49,216 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:49,216 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:56:49,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560538243] [2019-11-06 22:56:49,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:56:49,226 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:49,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:56:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:56:49,245 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:56:53,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:53,568 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:56:53,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:56:53,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-06 22:56:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:53,610 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:56:53,610 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:56:53,625 INFO L630 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 [2019-11-06 22:56:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:56:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:56:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:56:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-11-06 22:56:53,786 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 23 [2019-11-06 22:56:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:53,787 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-11-06 22:56:53,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:56:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-11-06 22:56:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 22:56:53,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:53,795 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:56:53,796 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash -234642970, now seen corresponding path program 1 times [2019-11-06 22:56:53,796 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:53,797 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762519796] [2019-11-06 22:56:53,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:54,069 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762519796] [2019-11-06 22:56:54,069 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:54,070 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:54,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343208656] [2019-11-06 22:56:54,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:54,072 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:54,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:54,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:54,073 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-11-06 22:56:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:59,668 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-11-06 22:56:59,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:59,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-11-06 22:56:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:59,691 INFO L225 Difference]: With dead ends: 4294 [2019-11-06 22:56:59,691 INFO L226 Difference]: Without dead ends: 2888 [2019-11-06 22:56:59,696 INFO L630 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 [2019-11-06 22:56:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-11-06 22:56:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-11-06 22:56:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-11-06 22:56:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4761 transitions. [2019-11-06 22:56:59,811 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4761 transitions. Word has length 97 [2019-11-06 22:56:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:59,813 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4761 transitions. [2019-11-06 22:56:59,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4761 transitions. [2019-11-06 22:56:59,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 22:56:59,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:59,823 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:56:59,823 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:59,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash -127512130, now seen corresponding path program 1 times [2019-11-06 22:56:59,824 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:59,825 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764056233] [2019-11-06 22:56:59,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:00,009 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764056233] [2019-11-06 22:57:00,009 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:00,010 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:00,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841908882] [2019-11-06 22:57:00,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:00,011 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:00,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:00,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:00,012 INFO L87 Difference]: Start difference. First operand 2864 states and 4761 transitions. Second operand 6 states. [2019-11-06 22:57:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:04,649 INFO L93 Difference]: Finished difference Result 7205 states and 11771 transitions. [2019-11-06 22:57:04,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:04,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-11-06 22:57:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:04,682 INFO L225 Difference]: With dead ends: 7205 [2019-11-06 22:57:04,683 INFO L226 Difference]: Without dead ends: 4347 [2019-11-06 22:57:04,690 INFO L630 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 [2019-11-06 22:57:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-11-06 22:57:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4331. [2019-11-06 22:57:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-11-06 22:57:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6101 transitions. [2019-11-06 22:57:04,832 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6101 transitions. Word has length 109 [2019-11-06 22:57:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:04,833 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 6101 transitions. [2019-11-06 22:57:04,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6101 transitions. [2019-11-06 22:57:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:57:04,834 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:04,835 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:57:04,835 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:04,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1618208947, now seen corresponding path program 1 times [2019-11-06 22:57:04,836 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:04,836 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008648702] [2019-11-06 22:57:04,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:05,021 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008648702] [2019-11-06 22:57:05,022 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859544607] [2019-11-06 22:57:05,022 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 22:57:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:05,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:57:05,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:57:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:05,248 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:57:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:05,309 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:57:05,309 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-06 22:57:05,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898300310] [2019-11-06 22:57:05,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:57:05,312 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:05,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:57:05,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:05,314 INFO L87 Difference]: Start difference. First operand 4331 states and 6101 transitions. Second operand 4 states. [2019-11-06 22:57:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:11,441 INFO L93 Difference]: Finished difference Result 15785 states and 22608 transitions. [2019-11-06 22:57:11,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:57:11,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-11-06 22:57:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:11,494 INFO L225 Difference]: With dead ends: 15785 [2019-11-06 22:57:11,495 INFO L226 Difference]: Without dead ends: 11460 [2019-11-06 22:57:11,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-11-06 22:57:11,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 10758. [2019-11-06 22:57:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10758 states. [2019-11-06 22:57:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10758 states to 10758 states and 14648 transitions. [2019-11-06 22:57:11,859 INFO L78 Accepts]: Start accepts. Automaton has 10758 states and 14648 transitions. Word has length 134 [2019-11-06 22:57:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:11,863 INFO L462 AbstractCegarLoop]: Abstraction has 10758 states and 14648 transitions. [2019-11-06 22:57:11,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:57:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10758 states and 14648 transitions. [2019-11-06 22:57:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-06 22:57:11,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:11,872 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:57:12,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:57:12,077 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:12,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1383176335, now seen corresponding path program 1 times [2019-11-06 22:57:12,078 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:12,078 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867341483] [2019-11-06 22:57:12,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:57:12,372 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867341483] [2019-11-06 22:57:12,372 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660361429] [2019-11-06 22:57:12,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:57:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:12,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:57:12,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:57:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-06 22:57:12,534 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:57:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:57:12,640 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:57:12,640 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-11-06 22:57:12,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044491419] [2019-11-06 22:57:12,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:57:12,642 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:12,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:57:12,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:12,643 INFO L87 Difference]: Start difference. First operand 10758 states and 14648 transitions. Second operand 5 states. [2019-11-06 22:57:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:17,421 INFO L93 Difference]: Finished difference Result 21713 states and 30030 transitions. [2019-11-06 22:57:17,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:17,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2019-11-06 22:57:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:17,464 INFO L225 Difference]: With dead ends: 21713 [2019-11-06 22:57:17,465 INFO L226 Difference]: Without dead ends: 10961 [2019-11-06 22:57:17,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 331 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:57:17,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10961 states. [2019-11-06 22:57:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10961 to 10163. [2019-11-06 22:57:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10163 states. [2019-11-06 22:57:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 13035 transitions. [2019-11-06 22:57:17,690 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 13035 transitions. Word has length 168 [2019-11-06 22:57:17,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:17,691 INFO L462 AbstractCegarLoop]: Abstraction has 10163 states and 13035 transitions. [2019-11-06 22:57:17,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:57:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 13035 transitions. [2019-11-06 22:57:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-06 22:57:17,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:17,696 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:57:17,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:57:17,900 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1478446898, now seen corresponding path program 1 times [2019-11-06 22:57:17,901 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:17,901 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224957366] [2019-11-06 22:57:17,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat