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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:48:48,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:48:48,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:48:48,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 19:48:48,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 19:48:48,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 19:48:48,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 19:48:48,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 19:48:48,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 19:48:48,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 19:48:48,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 19:48:48,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 19:48:48,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 19:48:48,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 19:48:48,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 19:48:48,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 19:48:48,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 19:48:48,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 19:48:48,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 19:48:48,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 19:48:48,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 19:48:48,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 19:48:48,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 19:48:48,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 19:48:48,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-02 19:48:48,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-02 19:48:48,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-02 19:48:48,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-02 19:48:48,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-02 19:48:48,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-02 19:48:48,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 19:48:48,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 19:48:48,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 19:48:48,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 19:48:48,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 19:48:48,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 19:48:48,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 19:48:48,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 19:48:48,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 19:48:48,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 19:48:48,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 19:48:48,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 19:48:48,692 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:48:48,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:48:48,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:48:48,694 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:48:48,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:48:48,695 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:48:48,696 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:48:48,696 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:48:48,696 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:48:48,696 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:48:48,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:48:48,699 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:48:48,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:48:48,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:48:48,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:48:48,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:48:48,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:48:48,700 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:48:48,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:48:48,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:48:48,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:48:48,701 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:48:48,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:48:48,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:48:48,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:48:48,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:48:48,702 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:48:48,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:48:48,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:48:48,703 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:48:48,740 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:48:48,757 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:48:48,762 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:48:48,763 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:48:48,765 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:48:48,766 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label37.c [2019-10-02 19:48:48,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8ca732d7/346c23152587409dba208920559f3de7/FLAGcfd670870 [2019-10-02 19:48:49,480 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:48:49,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label37.c [2019-10-02 19:48:49,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8ca732d7/346c23152587409dba208920559f3de7/FLAGcfd670870 [2019-10-02 19:48:49,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8ca732d7/346c23152587409dba208920559f3de7 [2019-10-02 19:48:49,729 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:48:49,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:48:49,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:48:49,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:48:49,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:48:49,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:48:49" (1/1) ... [2019-10-02 19:48:49,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6157593b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:49, skipping insertion in model container [2019-10-02 19:48:49,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:48:49" (1/1) ... [2019-10-02 19:48:49,757 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:48:49,839 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:48:50,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:48:50,495 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:48:50,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:48:50,722 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:48:50,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:50 WrapperNode [2019-10-02 19:48:50,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:48:50,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:48:50,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:48:50,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:48:50,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:50" (1/1) ... [2019-10-02 19:48:50,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:50" (1/1) ... [2019-10-02 19:48:50,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:50" (1/1) ... [2019-10-02 19:48:50,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:50" (1/1) ... [2019-10-02 19:48:50,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:50" (1/1) ... [2019-10-02 19:48:50,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:50" (1/1) ... [2019-10-02 19:48:50,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:50" (1/1) ... [2019-10-02 19:48:50,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:48:50,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:48:50,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:48:50,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:48:50,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:50" (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 [2019-10-02 19:48:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:48:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:48:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:48:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:48:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:48:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:48:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:48:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:48:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:48:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:48:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:48:52,774 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:48:52,775 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:48:52,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:48:52 BoogieIcfgContainer [2019-10-02 19:48:52,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:48:52,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:48:52,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:48:52,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:48:52,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:48:49" (1/3) ... [2019-10-02 19:48:52,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d97f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:48:52, skipping insertion in model container [2019-10-02 19:48:52,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:50" (2/3) ... [2019-10-02 19:48:52,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d97f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:48:52, skipping insertion in model container [2019-10-02 19:48:52,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:48:52" (3/3) ... [2019-10-02 19:48:52,786 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label37.c [2019-10-02 19:48:52,798 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:48:52,807 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:48:52,827 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:48:52,858 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:48:52,858 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:48:52,858 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:48:52,859 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:48:52,859 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:48:52,859 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:48:52,859 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:48:52,859 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:48:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 19:48:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-02 19:48:52,918 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:48:52,919 INFO L411 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] [2019-10-02 19:48:52,923 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:48:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:48:52,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1618793274, now seen corresponding path program 1 times [2019-10-02 19:48:52,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:48:52,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:52,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:48:53,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:53,006 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:48:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:48:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:48:53,386 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:48:53,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:48:53,386 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:48:53,393 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:48:53,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:48:53,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:48:53,415 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-02 19:48:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:48:55,574 INFO L93 Difference]: Finished difference Result 708 states and 1054 transitions. [2019-10-02 19:48:55,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:48:55,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-10-02 19:48:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:48:55,601 INFO L225 Difference]: With dead ends: 708 [2019-10-02 19:48:55,602 INFO L226 Difference]: Without dead ends: 620 [2019-10-02 19:48:55,604 INFO L640 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 [2019-10-02 19:48:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-02 19:48:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 614. [2019-10-02 19:48:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-02 19:48:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 908 transitions. [2019-10-02 19:48:55,700 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 908 transitions. Word has length 55 [2019-10-02 19:48:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:48:55,701 INFO L475 AbstractCegarLoop]: Abstraction has 614 states and 908 transitions. [2019-10-02 19:48:55,701 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:48:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 908 transitions. [2019-10-02 19:48:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-02 19:48:55,709 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:48:55,709 INFO L411 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, 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] [2019-10-02 19:48:55,710 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:48:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:48:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2133526889, now seen corresponding path program 1 times [2019-10-02 19:48:55,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:48:55,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:55,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:48:55,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:55,713 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:48:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:48:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:48:55,972 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:48:55,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:48:55,972 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:48:55,975 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:48:55,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:48:55,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:48:55,976 INFO L87 Difference]: Start difference. First operand 614 states and 908 transitions. Second operand 4 states. [2019-10-02 19:48:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:48:57,956 INFO L93 Difference]: Finished difference Result 1767 states and 2514 transitions. [2019-10-02 19:48:57,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:48:57,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2019-10-02 19:48:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:48:57,969 INFO L225 Difference]: With dead ends: 1767 [2019-10-02 19:48:57,969 INFO L226 Difference]: Without dead ends: 1767 [2019-10-02 19:48:57,970 INFO L640 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 [2019-10-02 19:48:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2019-10-02 19:48:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1750. [2019-10-02 19:48:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1750 states. [2019-10-02 19:48:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2480 transitions. [2019-10-02 19:48:58,051 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2480 transitions. Word has length 128 [2019-10-02 19:48:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:48:58,052 INFO L475 AbstractCegarLoop]: Abstraction has 1750 states and 2480 transitions. [2019-10-02 19:48:58,053 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:48:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2480 transitions. [2019-10-02 19:48:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-10-02 19:48:58,073 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:48:58,073 INFO L411 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:48:58,074 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:48:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:48:58,074 INFO L82 PathProgramCache]: Analyzing trace with hash 209251815, now seen corresponding path program 1 times [2019-10-02 19:48:58,074 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:48:58,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:58,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:48:58,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:58,076 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:48:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:48:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 96 proven. 94 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 19:48:58,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:48:58,443 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:48:58,444 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 277 with the following transitions: [2019-10-02 19:48:58,446 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [610], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [738], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 19:48:58,502 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:48:58,502 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:52:13,849 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:52:13,851 INFO L272 AbstractInterpreter]: Visited 128 different actions 128 times. Never merged. Never widened. Performed 305 root evaluator evaluations with a maximum evaluation depth of 17. Performed 305 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 28 variables. [2019-10-02 19:52:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:52:13,856 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:56:34,735 INFO L227 lantSequenceWeakener]: Weakened 257 states. On average, predicates are now at 73.72% of their original sizes. [2019-10-02 19:56:34,736 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:56:34,838 INFO L420 sIntCurrentIteration]: We unified 275 AI predicates to 275 [2019-10-02 19:56:34,841 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:56:34,842 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:56:34,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 19:56:34,843 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:56:34,846 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:56:34,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:56:34,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:56:34,849 INFO L87 Difference]: Start difference. First operand 1750 states and 2480 transitions. Second operand 10 states.