java -Xss4m -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label03_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-71425fa [2018-07-21 19:30:23,455 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-21 19:30:23,458 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-21 19:30:23,476 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-21 19:30:23,477 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-21 19:30:23,478 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-21 19:30:23,479 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-21 19:30:23,483 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-21 19:30:23,485 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-21 19:30:23,487 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-21 19:30:23,488 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-21 19:30:23,488 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-21 19:30:23,489 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-21 19:30:23,490 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-21 19:30:23,495 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-21 19:30:23,496 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-21 19:30:23,497 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-21 19:30:23,510 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-21 19:30:23,511 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-21 19:30:23,513 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-21 19:30:23,514 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-21 19:30:23,515 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-21 19:30:23,520 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-21 19:30:23,521 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-21 19:30:23,521 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-21 19:30:23,522 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-21 19:30:23,523 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-21 19:30:23,524 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-21 19:30:23,528 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-21 19:30:23,529 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-21 19:30:23,529 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-21 19:30:23,529 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-21 19:30:23,534 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-21 19:30:23,534 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-21 19:30:23,535 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-21 19:30:23,536 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-21 19:30:23,536 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-07-21 19:30:23,555 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-21 19:30:23,555 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-21 19:30:23,556 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-21 19:30:23,556 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-21 19:30:23,557 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-21 19:30:23,557 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-21 19:30:23,557 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-21 19:30:23,557 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-21 19:30:23,557 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-21 19:30:23,557 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-21 19:30:23,558 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-07-21 19:30:23,558 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-21 19:30:23,559 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-21 19:30:23,559 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-21 19:30:23,559 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-21 19:30:23,559 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-21 19:30:23,559 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-21 19:30:23,559 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-21 19:30:23,560 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-21 19:30:23,560 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-21 19:30:23,560 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-21 19:30:23,560 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-21 19:30:23,560 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-21 19:30:23,564 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-21 19:30:23,564 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-21 19:30:23,565 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-21 19:30:23,565 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-07-21 19:30:23,565 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-21 19:30:23,565 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-21 19:30:23,565 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-07-21 19:30:23,566 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-21 19:30:23,566 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-21 19:30:23,566 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-21 19:30:23,566 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-21 19:30:23,566 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-21 19:30:23,616 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-21 19:30:23,635 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-21 19:30:23,641 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-21 19:30:23,643 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-21 19:30:23,643 INFO L276 PluginConnector]: CDTParser initialized [2018-07-21 19:30:23,644 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label03_true-unreach-call.c [2018-07-21 19:30:24,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/4d3ba640c/d2c25a3b031b471e93404cce604a2493/FLAGe9ea44a34 [2018-07-21 19:30:24,514 INFO L276 CDTParser]: Found 1 translation units. [2018-07-21 19:30:24,515 INFO L158 CDTParser]: Scanning /storage/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label03_true-unreach-call.c [2018-07-21 19:30:24,565 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/4d3ba640c/d2c25a3b031b471e93404cce604a2493/FLAGe9ea44a34 [2018-07-21 19:30:24,585 INFO L332 CDTParser]: Successfully deleted /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/4d3ba640c/d2c25a3b031b471e93404cce604a2493 [2018-07-21 19:30:24,597 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-21 19:30:24,603 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-21 19:30:24,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-21 19:30:24,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-21 19:30:24,614 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-21 19:30:24,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:30:24" (1/1) ... [2018-07-21 19:30:24,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff4171e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:24, skipping insertion in model container [2018-07-21 19:30:24,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:30:24" (1/1) ... [2018-07-21 19:30:24,916 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-21 19:30:25,782 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 19:30:25,801 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-21 19:30:26,283 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 19:30:26,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26 WrapperNode [2018-07-21 19:30:26,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-21 19:30:26,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-21 19:30:26,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-21 19:30:26,597 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-21 19:30:26,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (1/1) ... [2018-07-21 19:30:26,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (1/1) ... [2018-07-21 19:30:26,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-21 19:30:26,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-21 19:30:26,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-21 19:30:26,855 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-21 19:30:26,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (1/1) ... [2018-07-21 19:30:26,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (1/1) ... [2018-07-21 19:30:26,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (1/1) ... [2018-07-21 19:30:26,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (1/1) ... [2018-07-21 19:30:27,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (1/1) ... [2018-07-21 19:30:27,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (1/1) ... [2018-07-21 19:30:27,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (1/1) ... [2018-07-21 19:30:27,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-21 19:30:27,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-21 19:30:27,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-21 19:30:27,842 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-21 19:30:27,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (1/1) ... No working directory specified, using /storage/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 [2018-07-21 19:30:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-21 19:30:27,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-21 19:30:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-21 19:30:27,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-21 19:30:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-21 19:30:27,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-21 19:30:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-21 19:30:27,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-21 19:30:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-21 19:30:27,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-21 19:30:39,905 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-21 19:30:39,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:30:39 BoogieIcfgContainer [2018-07-21 19:30:39,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-21 19:30:39,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-21 19:30:39,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-21 19:30:39,911 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-21 19:30:39,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:30:24" (1/3) ... [2018-07-21 19:30:39,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7371d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:30:39, skipping insertion in model container [2018-07-21 19:30:39,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:26" (2/3) ... [2018-07-21 19:30:39,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7371d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:30:39, skipping insertion in model container [2018-07-21 19:30:39,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:30:39" (3/3) ... [2018-07-21 19:30:39,921 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label03_true-unreach-call.c [2018-07-21 19:30:39,930 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-21 19:30:39,938 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-21 19:30:40,004 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-21 19:30:40,005 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-21 19:30:40,005 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-21 19:30:40,005 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-21 19:30:40,005 INFO L376 AbstractCegarLoop]: Backedges is TWOTRACK [2018-07-21 19:30:40,005 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-21 19:30:40,005 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-21 19:30:40,005 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-21 19:30:40,006 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-21 19:30:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-07-21 19:30:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-21 19:30:40,051 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 19:30:40,053 INFO L358 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] [2018-07-21 19:30:40,053 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 19:30:40,057 INFO L82 PathProgramCache]: Analyzing trace with hash -232998804, now seen corresponding path program 1 times [2018-07-21 19:30:40,059 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-21 19:30:40,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:30:40,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:30:40,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:30:40,113 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-21 19:30:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:30:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 19:30:40,645 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 19:30:40,645 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-21 19:30:40,645 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-21 19:30:40,649 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-21 19:30:40,664 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-21 19:30:40,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-21 19:30:40,667 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-07-21 19:30:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 19:30:51,483 INFO L93 Difference]: Finished difference Result 2137 states and 3966 transitions. [2018-07-21 19:30:51,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-21 19:30:51,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-07-21 19:30:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 19:30:51,517 INFO L225 Difference]: With dead ends: 2137 [2018-07-21 19:30:51,517 INFO L226 Difference]: Without dead ends: 1527 [2018-07-21 19:30:51,527 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-21 19:30:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2018-07-21 19:30:51,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1513. [2018-07-21 19:30:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1513 states. [2018-07-21 19:30:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2344 transitions. [2018-07-21 19:30:51,683 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2344 transitions. Word has length 56 [2018-07-21 19:30:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 19:30:51,683 INFO L471 AbstractCegarLoop]: Abstraction has 1513 states and 2344 transitions. [2018-07-21 19:30:51,684 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-21 19:30:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2344 transitions. [2018-07-21 19:30:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-21 19:30:51,695 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 19:30:51,697 INFO L358 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, 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] [2018-07-21 19:30:51,697 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 19:30:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash 650981338, now seen corresponding path program 1 times [2018-07-21 19:30:51,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-21 19:30:51,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:30:51,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:30:51,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:30:51,700 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-21 19:30:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:30:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 19:30:52,029 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 19:30:52,029 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-21 19:30:52,029 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-21 19:30:52,031 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-21 19:30:52,031 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-21 19:30:52,032 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-07-21 19:30:52,033 INFO L87 Difference]: Start difference. First operand 1513 states and 2344 transitions. Second operand 6 states. [2018-07-21 19:31:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 19:31:07,001 INFO L93 Difference]: Finished difference Result 5740 states and 9199 transitions. [2018-07-21 19:31:07,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-21 19:31:07,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2018-07-21 19:31:07,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 19:31:07,036 INFO L225 Difference]: With dead ends: 5740 [2018-07-21 19:31:07,036 INFO L226 Difference]: Without dead ends: 4233 [2018-07-21 19:31:07,049 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-07-21 19:31:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2018-07-21 19:31:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 4226. [2018-07-21 19:31:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4226 states. [2018-07-21 19:31:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4226 states to 4226 states and 5627 transitions. [2018-07-21 19:31:07,236 INFO L78 Accepts]: Start accepts. Automaton has 4226 states and 5627 transitions. Word has length 128 [2018-07-21 19:31:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 19:31:07,236 INFO L471 AbstractCegarLoop]: Abstraction has 4226 states and 5627 transitions. [2018-07-21 19:31:07,238 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-21 19:31:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4226 states and 5627 transitions. [2018-07-21 19:31:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-21 19:31:07,251 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 19:31:07,251 INFO L358 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, 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] [2018-07-21 19:31:07,251 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 19:31:07,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1876403898, now seen corresponding path program 1 times [2018-07-21 19:31:07,252 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-21 19:31:07,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:31:07,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:31:07,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:31:07,256 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-21 19:31:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:31:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 19:31:08,107 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 19:31:08,107 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-21 19:31:08,108 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 132 with the following transitions: [2018-07-21 19:31:08,111 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [19], [21], [735], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1082], [1084], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1207], [1215], [1223], [1228], [1232], [1236], [1240], [1244], [1247], [2303], [2304], [2305], [2306], [2308], [2309] [2018-07-21 19:31:08,175 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-21 19:31:08,175 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-21 19:31:13,732 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-21 19:31:33,215 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-21 19:31:33,217 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-07-21 19:31:33,261 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-21 19:31:33,261 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 19:31:33,261 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 19:31:33,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:31:33,370 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-21 19:31:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:31:33,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 19:31:37,096 WARN L169 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 32 [2018-07-21 19:31:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 19:31:39,412 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-21 19:31:39,710 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-07-21 19:31:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 19:31:39,890 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-21 19:31:39,891 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-07-21 19:31:39,891 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-21 19:31:39,891 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-21 19:31:39,892 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-21 19:31:39,892 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-07-21 19:31:39,892 INFO L87 Difference]: Start difference. First operand 4226 states and 5627 transitions. Second operand 3 states. [2018-07-21 19:31:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 19:31:44,735 INFO L93 Difference]: Finished difference Result 9780 states and 13483 transitions. [2018-07-21 19:31:44,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-21 19:31:44,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2018-07-21 19:31:44,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 19:31:44,771 INFO L225 Difference]: With dead ends: 9780 [2018-07-21 19:31:44,772 INFO L226 Difference]: Without dead ends: 5560 [2018-07-21 19:31:44,798 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 258 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-07-21 19:31:44,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2018-07-21 19:31:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5558. [2018-07-21 19:31:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5558 states. [2018-07-21 19:31:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 7328 transitions. [2018-07-21 19:31:44,990 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 7328 transitions. Word has length 131 [2018-07-21 19:31:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 19:31:44,991 INFO L471 AbstractCegarLoop]: Abstraction has 5558 states and 7328 transitions. [2018-07-21 19:31:44,991 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-21 19:31:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 7328 transitions. [2018-07-21 19:31:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-21 19:31:44,997 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 19:31:44,998 INFO L358 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 19:31:44,998 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 19:31:44,998 INFO L82 PathProgramCache]: Analyzing trace with hash 560776992, now seen corresponding path program 1 times [2018-07-21 19:31:44,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-21 19:31:44,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:31:44,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:31:44,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:31:45,000 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-21 19:31:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:31:45,411 WARN L169 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-21 19:31:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 99 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-07-21 19:31:45,858 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 19:31:45,858 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-21 19:31:45,858 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 208 with the following transitions: [2018-07-21 19:31:45,858 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [19], [21], [735], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1082], [1084], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1207], [1215], [1223], [1228], [1232], [1236], [1240], [1244], [1247], [1248], [1251], [2303], [2304], [2305], [2306], [2308], [2309] [2018-07-21 19:31:45,872 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-21 19:31:45,872 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-21 19:31:49,925 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-21 19:32:04,420 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-21 19:32:04,420 INFO L272 AbstractInterpreter]: Visited 85 different actions 241 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-07-21 19:32:04,426 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-21 19:32:04,426 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 19:32:04,426 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 19:32:04,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:32:04,434 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-21 19:32:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:32:04,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 19:32:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 19:32:04,675 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-21 19:32:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 19:32:04,786 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 19:32:04,786 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-21 19:32:04,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:32:04,817 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-21 19:32:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:32:04,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 19:32:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-21 19:32:05,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-21 19:32:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-21 19:32:05,577 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-21 19:32:05,577 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 11 [2018-07-21 19:32:05,577 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-21 19:32:05,578 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-21 19:32:05,579 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-21 19:32:05,579 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-21 19:32:05,579 INFO L87 Difference]: Start difference. First operand 5558 states and 7328 transitions. Second operand 5 states. [2018-07-21 19:32:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 19:32:11,366 INFO L93 Difference]: Finished difference Result 16601 states and 22931 transitions. [2018-07-21 19:32:11,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-21 19:32:11,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2018-07-21 19:32:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 19:32:11,432 INFO L225 Difference]: With dead ends: 16601 [2018-07-21 19:32:11,432 INFO L226 Difference]: Without dead ends: 11049 [2018-07-21 19:32:11,459 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 820 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-21 19:32:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11049 states. [2018-07-21 19:32:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11049 to 11049. [2018-07-21 19:32:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11049 states. [2018-07-21 19:32:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11049 states to 11049 states and 14476 transitions. [2018-07-21 19:32:11,822 INFO L78 Accepts]: Start accepts. Automaton has 11049 states and 14476 transitions. Word has length 207 [2018-07-21 19:32:11,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 19:32:11,824 INFO L471 AbstractCegarLoop]: Abstraction has 11049 states and 14476 transitions. [2018-07-21 19:32:11,824 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-21 19:32:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 11049 states and 14476 transitions. [2018-07-21 19:32:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-07-21 19:32:11,832 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 19:32:11,832 INFO L358 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 19:32:11,832 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 19:32:11,832 INFO L82 PathProgramCache]: Analyzing trace with hash -407665504, now seen corresponding path program 1 times [2018-07-21 19:32:11,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-21 19:32:11,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:32:11,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:32:11,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:32:11,834 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-21 19:32:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:32:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-07-21 19:32:12,156 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 19:32:12,156 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-21 19:32:12,156 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-21 19:32:12,156 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-21 19:32:12,157 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-21 19:32:12,157 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-21 19:32:12,157 INFO L87 Difference]: Start difference. First operand 11049 states and 14476 transitions. Second operand 4 states. [2018-07-21 19:32:16,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 19:32:16,715 INFO L93 Difference]: Finished difference Result 27738 states and 39775 transitions. [2018-07-21 19:32:16,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-21 19:32:16,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 220 [2018-07-21 19:32:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 19:32:16,819 INFO L225 Difference]: With dead ends: 27738 [2018-07-21 19:32:16,819 INFO L226 Difference]: Without dead ends: 16695 [2018-07-21 19:32:16,899 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-21 19:32:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16695 states. [2018-07-21 19:32:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16695 to 16608. [2018-07-21 19:32:17,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16608 states. [2018-07-21 19:32:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16608 states to 16608 states and 21472 transitions. [2018-07-21 19:32:17,639 INFO L78 Accepts]: Start accepts. Automaton has 16608 states and 21472 transitions. Word has length 220 [2018-07-21 19:32:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 19:32:17,641 INFO L471 AbstractCegarLoop]: Abstraction has 16608 states and 21472 transitions. [2018-07-21 19:32:17,641 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-21 19:32:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 16608 states and 21472 transitions. [2018-07-21 19:32:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-07-21 19:32:17,652 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 19:32:17,653 INFO L358 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 19:32:17,653 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 19:32:17,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1306460193, now seen corresponding path program 1 times [2018-07-21 19:32:17,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-21 19:32:17,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:32:17,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:32:17,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:32:17,661 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-21 19:32:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:32:17,991 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-21 19:32:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 99 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-21 19:32:18,449 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 19:32:18,449 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-21 19:32:18,449 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2018-07-21 19:32:18,450 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [19], [21], [735], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1082], [1084], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1207], [1215], [1223], [1228], [1232], [1236], [1240], [1244], [1247], [1248], [1252], [1256], [1260], [1264], [1268], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1311], [1315], [1319], [1323], [1326], [2303], [2304], [2305], [2306], [2308], [2309] [2018-07-21 19:32:18,458 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-21 19:32:18,458 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-21 19:32:22,189 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-21 19:32:39,950 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-21 19:32:39,950 INFO L272 AbstractInterpreter]: Visited 102 different actions 292 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-07-21 19:32:39,957 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-21 19:32:39,957 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 19:32:39,957 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 19:32:39,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:32:39,964 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-21 19:32:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:32:40,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 19:32:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 19:32:40,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-21 19:32:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 19:32:40,414 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 19:32:40,414 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-21 19:32:40,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:32:40,429 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-21 19:32:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:32:40,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 19:32:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-21 19:32:40,629 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-21 19:32:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-21 19:32:40,718 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-21 19:32:40,718 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 12 [2018-07-21 19:32:40,718 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-21 19:32:40,719 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-21 19:32:40,719 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-21 19:32:40,719 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-21 19:32:40,719 INFO L87 Difference]: Start difference. First operand 16608 states and 21472 transitions. Second operand 5 states. [2018-07-21 19:32:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 19:32:46,842 INFO L93 Difference]: Finished difference Result 38556 states and 50528 transitions. [2018-07-21 19:32:46,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-21 19:32:46,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2018-07-21 19:32:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 19:32:46,935 INFO L225 Difference]: With dead ends: 38556 [2018-07-21 19:32:46,935 INFO L226 Difference]: Without dead ends: 21954 [2018-07-21 19:32:46,976 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 888 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-21 19:32:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21954 states. [2018-07-21 19:32:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21954 to 21954. [2018-07-21 19:32:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21954 states. [2018-07-21 19:32:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21954 states to 21954 states and 26345 transitions. [2018-07-21 19:32:47,612 INFO L78 Accepts]: Start accepts. Automaton has 21954 states and 26345 transitions. Word has length 224 [2018-07-21 19:32:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 19:32:47,614 INFO L471 AbstractCegarLoop]: Abstraction has 21954 states and 26345 transitions. [2018-07-21 19:32:47,614 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-21 19:32:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 21954 states and 26345 transitions. [2018-07-21 19:32:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-07-21 19:32:47,624 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 19:32:47,625 INFO L358 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 19:32:47,625 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 19:32:47,625 INFO L82 PathProgramCache]: Analyzing trace with hash -948798117, now seen corresponding path program 1 times [2018-07-21 19:32:47,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-21 19:32:47,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:32:47,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 19:32:47,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 19:32:47,627 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-21 19:32:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 19:32:48,305 WARN L169 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-21 19:32:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 98 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-21 19:32:48,583 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 19:32:48,583 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-21 19:32:48,584 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 244 with the following transitions: [2018-07-21 19:32:48,584 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [19], [21], [735], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1082], [1084], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1207], [1215], [1223], [1228], [1232], [1236], [1240], [1244], [1248], [1252], [1255], [1256], [1260], [1264], [1268], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1311], [1315], [1319], [1323], [1327], [1331], [1342], [1346], [1350], [1354], [1358], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1408], [2303], [2304], [2305], [2306], [2308], [2309] [2018-07-21 19:32:48,597 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-21 19:32:48,597 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-21 19:32:53,342 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-21 19:32:57,577 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-07-21 19:32:57,577 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-07-21 19:32:57,583 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-07-21 19:33:10,852 INFO L232 lantSequenceWeakener]: Weakened 235 states. On average, predicates are now at 75.7% of their original sizes. [2018-07-21 19:33:10,852 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-07-21 19:33:11,681 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-07-21 19:33:11,682 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-07-21 19:33:11,682 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-07-21 19:33:11,682 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-21 19:33:11,683 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-21 19:33:11,683 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-21 19:33:11,684 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-07-21 19:33:11,684 INFO L87 Difference]: Start difference. First operand 21954 states and 26345 transitions. Second operand 9 states. Received shutdown request... [2018-07-21 19:33:53,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-21 19:33:53,069 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-21 19:33:53,074 WARN L202 ceAbstractionStarter]: Timeout [2018-07-21 19:33:53,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:33:53 BoogieIcfgContainer [2018-07-21 19:33:53,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-21 19:33:53,075 INFO L168 Benchmark]: Toolchain (without parser) took 208477.67 ms. Allocated memory was 309.3 MB in the beginning and 2.4 GB in the end (delta: 2.1 GB). Free memory was 246.8 MB in the beginning and 1.1 GB in the end (delta: -887.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 5.3 GB. [2018-07-21 19:33:53,075 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-07-21 19:33:53,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1991.19 ms. Allocated memory was 309.3 MB in the beginning and 408.9 MB in the end (delta: 99.6 MB). Free memory was 244.8 MB in the beginning and 343.7 MB in the end (delta: -98.9 MB). Peak memory consumption was 125.0 MB. Max. memory is 5.3 GB. [2018-07-21 19:33:53,076 INFO L168 Benchmark]: Boogie Procedure Inliner took 257.07 ms. Allocated memory is still 408.9 MB. Free memory was 343.7 MB in the beginning and 298.7 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 5.3 GB. [2018-07-21 19:33:53,076 INFO L168 Benchmark]: Boogie Preprocessor took 987.38 ms. Allocated memory was 408.9 MB in the beginning and 562.0 MB in the end (delta: 153.1 MB). Free memory was 298.7 MB in the beginning and 462.3 MB in the end (delta: -163.6 MB). Peak memory consumption was 34.0 MB. Max. memory is 5.3 GB. [2018-07-21 19:33:53,080 INFO L168 Benchmark]: RCFGBuilder took 12063.94 ms. Allocated memory was 562.0 MB in the beginning and 671.1 MB in the end (delta: 109.1 MB). Free memory was 462.3 MB in the beginning and 449.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 202.4 MB. Max. memory is 5.3 GB. [2018-07-21 19:33:53,081 INFO L168 Benchmark]: TraceAbstraction took 193167.17 ms. Allocated memory was 671.1 MB in the beginning and 2.4 GB in the end (delta: 1.7 GB). Free memory was 449.1 MB in the beginning and 1.1 GB in the end (delta: -685.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 5.3 GB. [2018-07-21 19:33:53,084 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 1991.19 ms. Allocated memory was 309.3 MB in the beginning and 408.9 MB in the end (delta: 99.6 MB). Free memory was 244.8 MB in the beginning and 343.7 MB in the end (delta: -98.9 MB). Peak memory consumption was 125.0 MB. Max. memory is 5.3 GB. * Boogie Procedure Inliner took 257.07 ms. Allocated memory is still 408.9 MB. Free memory was 343.7 MB in the beginning and 298.7 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 987.38 ms. Allocated memory was 408.9 MB in the beginning and 562.0 MB in the end (delta: 153.1 MB). Free memory was 298.7 MB in the beginning and 462.3 MB in the end (delta: -163.6 MB). Peak memory consumption was 34.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 12063.94 ms. Allocated memory was 562.0 MB in the beginning and 671.1 MB in the end (delta: 109.1 MB). Free memory was 462.3 MB in the beginning and 449.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 202.4 MB. Max. memory is 5.3 GB. * TraceAbstraction took 193167.17 ms. Allocated memory was 671.1 MB in the beginning and 2.4 GB in the end (delta: 1.7 GB). Free memory was 449.1 MB in the beginning and 1.1 GB in the end (delta: -685.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 155]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 155). Cancelled while BasicCegarLoop was constructing difference of abstraction (21954states) and interpolant automaton (currently 9 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (1419 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 193.0s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 89.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2587 SDtfs, 8699 SDslu, 1487 SDs, 0 SdLazy, 15674 SolverSat, 4641 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 73.7s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 2274 GetRequests, 2211 SyntacticMatches, 14 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21954occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 74.2s AbstIntTime, 4 AbstIntIterations, 1 AbstIntStrong, 0.9959949141767324 AbsIntWeakeningRatio, 0.1115702479338843 AbsIntAvgWeakeningVarsNumRemoved, 35.63636363636363 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.2s AutomataMinimizationTime, 6 MinimizatonAttempts, 110 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 2202 NumberOfCodeBlocks, 2202 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 3178 ConstructedInterpolants, 52 QuantifiedInterpolants, 2535387 SizeOfPredicates, 6 NumberOfNonLiveVariables, 1912 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 17 InterpolantComputations, 6 PerfectInterpolantSequences, 2085/2275 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/Problem17_label03_true-unreach-call.c_svcomp-Reach-64bit-Taipan_Default.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-21_19-33-53-097.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/Problem17_label03_true-unreach-call.c_svcomp-Reach-64bit-Taipan_Default.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-21_19-33-53-097.csv Completed graceful shutdown