java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER__cases1_stripFullBoth_arr_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:55:49,914 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:55:49,916 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:55:49,928 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:55:49,928 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:55:49,929 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:55:49,931 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:55:49,933 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:55:49,935 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:55:49,935 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:55:49,936 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:55:49,937 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:55:49,938 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:55:49,939 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:55:49,940 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:55:49,941 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:55:49,942 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:55:49,944 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:55:49,946 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:55:49,947 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:55:49,949 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:55:49,950 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:55:49,952 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:55:49,961 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-22 15:55:49,991 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:55:49,991 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:55:49,995 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:55:49,995 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:55:49,995 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:55:49,996 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:55:49,996 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:55:49,996 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:55:49,996 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 15:55:49,996 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:55:49,997 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:55:49,997 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:55:49,999 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:55:49,999 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:55:49,999 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:55:49,999 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:55:50,000 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:55:50,000 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:55:50,000 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:55:50,000 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:55:50,000 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:55:50,002 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:55:50,002 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:55:50,002 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:55:50,002 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:55:50,003 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:55:50,003 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:55:50,003 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:55:50,003 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:55:50,004 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:55:50,004 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:55:50,004 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:55:50,004 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:55:50,004 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 15:55:50,077 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:55:50,096 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:55:50,100 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:55:50,101 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:55:50,102 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:55:50,103 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER__cases1_stripFullBoth_arr_false-unreach-call_true-termination.i [2018-10-22 15:55:50,169 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ed5877a1a/37670b6846f74ac5a001c8736f2abacf/FLAGfa7c36be8 [2018-10-22 15:55:50,673 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:55:50,674 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER__cases1_stripFullBoth_arr_false-unreach-call_true-termination.i [2018-10-22 15:55:50,681 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ed5877a1a/37670b6846f74ac5a001c8736f2abacf/FLAGfa7c36be8 [2018-10-22 15:55:50,696 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ed5877a1a/37670b6846f74ac5a001c8736f2abacf [2018-10-22 15:55:50,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:55:50,708 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:55:50,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:55:50,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:55:50,713 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:55:50,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:55:50" (1/1) ... [2018-10-22 15:55:50,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457a5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:50, skipping insertion in model container [2018-10-22 15:55:50,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:55:50" (1/1) ... [2018-10-22 15:55:50,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:55:50,754 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:55:50,950 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:55:50,962 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:55:50,996 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:55:51,019 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:55:51,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51 WrapperNode [2018-10-22 15:55:51,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:55:51,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:55:51,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:55:51,021 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:55:51,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (1/1) ... [2018-10-22 15:55:51,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (1/1) ... [2018-10-22 15:55:51,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:55:51,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:55:51,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:55:51,076 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:55:51,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (1/1) ... [2018-10-22 15:55:51,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (1/1) ... [2018-10-22 15:55:51,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (1/1) ... [2018-10-22 15:55:51,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (1/1) ... [2018-10-22 15:55:51,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (1/1) ... [2018-10-22 15:55:51,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (1/1) ... [2018-10-22 15:55:51,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (1/1) ... [2018-10-22 15:55:51,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:55:51,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:55:51,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:55:51,110 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:55:51,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:55:51,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:55:51,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:55:51,246 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2018-10-22 15:55:51,246 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2018-10-22 15:55:51,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:55:51,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:55:51,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:55:51,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:55:51,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:55:51,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:55:51,835 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:55:51,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:55:51 BoogieIcfgContainer [2018-10-22 15:55:51,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:55:51,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:55:51,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:55:51,842 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:55:51,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:55:50" (1/3) ... [2018-10-22 15:55:51,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140ca917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:55:51, skipping insertion in model container [2018-10-22 15:55:51,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:51" (2/3) ... [2018-10-22 15:55:51,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140ca917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:55:51, skipping insertion in model container [2018-10-22 15:55:51,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:55:51" (3/3) ... [2018-10-22 15:55:51,849 INFO L112 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER__cases1_stripFullBoth_arr_false-unreach-call_true-termination.i [2018-10-22 15:55:51,859 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:55:51,870 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:55:51,889 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:55:51,917 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:55:51,918 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:55:51,918 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:55:51,918 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:55:51,918 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:55:51,918 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:55:51,919 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:55:51,919 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:55:51,919 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:55:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2018-10-22 15:55:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-22 15:55:51,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:51,946 INFO L375 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] [2018-10-22 15:55:51,948 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:51,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1430162208, now seen corresponding path program 1 times [2018-10-22 15:55:51,958 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:52,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:52,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:52,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:52,008 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:52,139 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:52,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:55:52,139 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:52,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:55:52,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:55:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:55:52,164 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 2 states. [2018-10-22 15:55:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:52,195 INFO L93 Difference]: Finished difference Result 87 states and 117 transitions. [2018-10-22 15:55:52,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:55:52,197 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-10-22 15:55:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:52,211 INFO L225 Difference]: With dead ends: 87 [2018-10-22 15:55:52,211 INFO L226 Difference]: Without dead ends: 40 [2018-10-22 15:55:52,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:55:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-22 15:55:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-22 15:55:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-22 15:55:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2018-10-22 15:55:52,272 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 24 [2018-10-22 15:55:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:52,272 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2018-10-22 15:55:52,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:55:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2018-10-22 15:55:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 15:55:52,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:52,277 INFO L375 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] [2018-10-22 15:55:52,277 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:52,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:52,277 INFO L82 PathProgramCache]: Analyzing trace with hash 681592423, now seen corresponding path program 1 times [2018-10-22 15:55:52,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:52,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:52,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:52,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:52,280 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:52,435 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:52,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:55:52,435 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:52,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:55:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:55:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:55:52,440 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 3 states. [2018-10-22 15:55:52,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:52,530 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2018-10-22 15:55:52,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:55:52,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2018-10-22 15:55:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:52,536 INFO L225 Difference]: With dead ends: 72 [2018-10-22 15:55:52,536 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 15:55:52,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:55:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 15:55:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-22 15:55:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-22 15:55:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2018-10-22 15:55:52,550 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 30 [2018-10-22 15:55:52,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:52,551 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2018-10-22 15:55:52,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:55:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2018-10-22 15:55:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 15:55:52,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:52,554 INFO L375 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] [2018-10-22 15:55:52,554 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:52,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash -906755479, now seen corresponding path program 1 times [2018-10-22 15:55:52,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:52,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:52,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:52,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:52,558 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:52,775 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:52,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:55:52,775 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:52,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:55:52,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:55:52,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:55:52,777 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 5 states. [2018-10-22 15:55:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:53,096 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2018-10-22 15:55:53,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:55:53,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-10-22 15:55:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:53,101 INFO L225 Difference]: With dead ends: 100 [2018-10-22 15:55:53,101 INFO L226 Difference]: Without dead ends: 68 [2018-10-22 15:55:53,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:55:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-22 15:55:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2018-10-22 15:55:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-22 15:55:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2018-10-22 15:55:53,116 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 30 [2018-10-22 15:55:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:53,116 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2018-10-22 15:55:53,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:55:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2018-10-22 15:55:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 15:55:53,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:53,118 INFO L375 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] [2018-10-22 15:55:53,118 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:53,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:53,119 INFO L82 PathProgramCache]: Analyzing trace with hash 925510185, now seen corresponding path program 1 times [2018-10-22 15:55:53,119 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:53,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:53,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:53,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:53,121 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:53,310 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:53,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-22 15:55:53,310 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:53,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:55:53,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:55:53,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:55:53,312 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 6 states. [2018-10-22 15:55:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:53,682 INFO L93 Difference]: Finished difference Result 158 states and 206 transitions. [2018-10-22 15:55:53,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:55:53,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2018-10-22 15:55:53,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:53,687 INFO L225 Difference]: With dead ends: 158 [2018-10-22 15:55:53,687 INFO L226 Difference]: Without dead ends: 89 [2018-10-22 15:55:53,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:55:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-22 15:55:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 58. [2018-10-22 15:55:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-22 15:55:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2018-10-22 15:55:53,703 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 30 [2018-10-22 15:55:53,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:53,706 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2018-10-22 15:55:53,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:55:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2018-10-22 15:55:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 15:55:53,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:53,708 INFO L375 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] [2018-10-22 15:55:53,708 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:53,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:53,709 INFO L82 PathProgramCache]: Analyzing trace with hash -85607065, now seen corresponding path program 1 times [2018-10-22 15:55:53,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:53,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:53,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:53,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:53,712 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:53,841 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:53,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:55:53,841 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:53,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:55:53,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:55:53,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:55:53,845 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 5 states. [2018-10-22 15:55:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:54,150 INFO L93 Difference]: Finished difference Result 136 states and 173 transitions. [2018-10-22 15:55:54,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:55:54,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-10-22 15:55:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:54,153 INFO L225 Difference]: With dead ends: 136 [2018-10-22 15:55:54,153 INFO L226 Difference]: Without dead ends: 69 [2018-10-22 15:55:54,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:55:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-22 15:55:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-10-22 15:55:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-22 15:55:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2018-10-22 15:55:54,162 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 30 [2018-10-22 15:55:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:54,162 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2018-10-22 15:55:54,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:55:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2018-10-22 15:55:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-22 15:55:54,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:54,164 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-22 15:55:54,164 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:54,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1176159658, now seen corresponding path program 1 times [2018-10-22 15:55:54,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:54,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:54,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:54,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:54,166 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:54,492 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-22 15:55:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:55:54,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:54,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-22 15:55:54,600 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:54,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:55:54,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:55:54,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:55:54,602 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 7 states. [2018-10-22 15:55:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:55,289 INFO L93 Difference]: Finished difference Result 160 states and 209 transitions. [2018-10-22 15:55:55,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:55:55,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2018-10-22 15:55:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:55,292 INFO L225 Difference]: With dead ends: 160 [2018-10-22 15:55:55,292 INFO L226 Difference]: Without dead ends: 109 [2018-10-22 15:55:55,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:55:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-22 15:55:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 77. [2018-10-22 15:55:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-22 15:55:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2018-10-22 15:55:55,311 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 35 [2018-10-22 15:55:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:55,311 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2018-10-22 15:55:55,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:55:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2018-10-22 15:55:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-22 15:55:55,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:55,315 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-22 15:55:55,315 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:55,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:55,315 INFO L82 PathProgramCache]: Analyzing trace with hash 165042408, now seen corresponding path program 1 times [2018-10-22 15:55:55,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:55,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:55,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:55,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:55,317 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:55,658 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-22 15:55:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:55:55,698 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:55,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-22 15:55:55,699 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:55,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:55:55,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:55:55,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:55:55,700 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand 7 states. [2018-10-22 15:55:55,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:55,949 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2018-10-22 15:55:55,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:55:55,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2018-10-22 15:55:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:55,954 INFO L225 Difference]: With dead ends: 112 [2018-10-22 15:55:55,954 INFO L226 Difference]: Without dead ends: 110 [2018-10-22 15:55:55,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:55:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-22 15:55:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2018-10-22 15:55:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-22 15:55:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2018-10-22 15:55:55,968 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 35 [2018-10-22 15:55:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:55,969 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2018-10-22 15:55:55,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:55:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2018-10-22 15:55:55,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:55:55,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:55,971 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-22 15:55:55,972 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:55,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash -52520849, now seen corresponding path program 1 times [2018-10-22 15:55:55,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:55,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:55,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:55,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:55,974 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:55:56,090 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:56,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:55:56,091 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:56,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:55:56,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:55:56,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:55:56,093 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 4 states. [2018-10-22 15:55:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:56,151 INFO L93 Difference]: Finished difference Result 159 states and 203 transitions. [2018-10-22 15:55:56,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:55:56,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-10-22 15:55:56,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:56,154 INFO L225 Difference]: With dead ends: 159 [2018-10-22 15:55:56,154 INFO L226 Difference]: Without dead ends: 109 [2018-10-22 15:55:56,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:55:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-22 15:55:56,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-22 15:55:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-22 15:55:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2018-10-22 15:55:56,166 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 37 [2018-10-22 15:55:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:56,166 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2018-10-22 15:55:56,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:55:56,166 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2018-10-22 15:55:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:55:56,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:56,168 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-22 15:55:56,168 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:56,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash 648543729, now seen corresponding path program 1 times [2018-10-22 15:55:56,169 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:56,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:56,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:56,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:56,170 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:56,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:56,340 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:56,340 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-10-22 15:55:56,342 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [17], [22], [26], [32], [35], [39], [43], [45], [48], [53], [55], [61], [67], [70], [76], [82], [89], [91], [93], [98], [104], [105], [109], [113], [116], [118], [124], [126], [127], [128], [130] [2018-10-22 15:55:56,395 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:55:56,396 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:56:10,113 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:56:10,114 INFO L272 AbstractInterpreter]: Visited 36 different actions 960 times. Merged at 23 different actions 793 times. Widened at 3 different actions 94 times. Found 2 fixpoints after 2 different actions. Largest state had 53 variables. [2018-10-22 15:56:10,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:10,162 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:56:10,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:10,162 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:56:10,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:10,177 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:56:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:10,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:10,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:10,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:10,770 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:10,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:10,803 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:56:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:10,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:10,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:11,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:11,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 8 [2018-10-22 15:56:11,216 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:11,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:56:11,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:56:11,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:56:11,219 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand 8 states. [2018-10-22 15:56:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:11,577 INFO L93 Difference]: Finished difference Result 228 states and 285 transitions. [2018-10-22 15:56:11,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:56:11,579 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2018-10-22 15:56:11,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:11,581 INFO L225 Difference]: With dead ends: 228 [2018-10-22 15:56:11,581 INFO L226 Difference]: Without dead ends: 139 [2018-10-22 15:56:11,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 142 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:56:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-22 15:56:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2018-10-22 15:56:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-22 15:56:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2018-10-22 15:56:11,591 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 37 [2018-10-22 15:56:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:11,591 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2018-10-22 15:56:11,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:56:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2018-10-22 15:56:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 15:56:11,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:11,593 INFO L375 BasicCegarLoop]: trace histogram [3, 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] [2018-10-22 15:56:11,593 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:11,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash 408592208, now seen corresponding path program 2 times [2018-10-22 15:56:11,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:11,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:11,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:11,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:11,595 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:12,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:12,288 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:12,288 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:56:12,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:56:12,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:12,289 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:12,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:56:12,298 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:56:12,356 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:56:12,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:12,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:12,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:12,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:12,793 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:12,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:56:12,808 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:56:12,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:56:12,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:56:12,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:12,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:13,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:13,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 9, 8] total 19 [2018-10-22 15:56:13,150 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:13,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:56:13,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:56:13,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:56:13,151 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand 16 states. [2018-10-22 15:56:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:13,719 INFO L93 Difference]: Finished difference Result 236 states and 291 transitions. [2018-10-22 15:56:13,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:56:13,719 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-10-22 15:56:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:13,722 INFO L225 Difference]: With dead ends: 236 [2018-10-22 15:56:13,722 INFO L226 Difference]: Without dead ends: 183 [2018-10-22 15:56:13,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 150 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:56:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-22 15:56:13,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 137. [2018-10-22 15:56:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-22 15:56:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2018-10-22 15:56:13,733 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 42 [2018-10-22 15:56:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:13,734 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2018-10-22 15:56:13,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:56:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2018-10-22 15:56:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 15:56:13,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:13,736 INFO L375 BasicCegarLoop]: trace histogram [3, 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] [2018-10-22 15:56:13,736 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:13,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:13,736 INFO L82 PathProgramCache]: Analyzing trace with hash 465850510, now seen corresponding path program 1 times [2018-10-22 15:56:13,736 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:13,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:13,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:56:13,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:13,737 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:13,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:13,870 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:13,871 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-10-22 15:56:13,871 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [17], [22], [26], [32], [35], [39], [43], [45], [48], [53], [55], [61], [67], [70], [78], [82], [89], [91], [93], [98], [104], [105], [109], [113], [116], [118], [124], [126], [127], [128], [130] [2018-10-22 15:56:13,875 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:56:13,875 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:56:24,851 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:56:24,851 INFO L272 AbstractInterpreter]: Visited 36 different actions 964 times. Merged at 23 different actions 794 times. Widened at 3 different actions 94 times. Found 2 fixpoints after 2 different actions. Largest state had 52 variables. [2018-10-22 15:56:24,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:24,859 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:56:24,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:24,859 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:24,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:24,868 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:56:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:24,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:25,371 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:25,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:25,547 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:25,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:25,563 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:56:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:25,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:25,681 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:25,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:25,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 10, 9] total 21 [2018-10-22 15:56:25,731 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:25,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:56:25,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:56:25,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:56:25,732 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand 16 states. [2018-10-22 15:56:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:26,204 INFO L93 Difference]: Finished difference Result 192 states and 229 transitions. [2018-10-22 15:56:26,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:56:26,205 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-10-22 15:56:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:26,208 INFO L225 Difference]: With dead ends: 192 [2018-10-22 15:56:26,208 INFO L226 Difference]: Without dead ends: 190 [2018-10-22 15:56:26,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:56:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-22 15:56:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 137. [2018-10-22 15:56:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-22 15:56:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2018-10-22 15:56:26,217 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 42 [2018-10-22 15:56:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:26,218 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2018-10-22 15:56:26,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:56:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2018-10-22 15:56:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 15:56:26,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:26,220 INFO L375 BasicCegarLoop]: trace histogram [3, 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] [2018-10-22 15:56:26,220 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:26,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:26,220 INFO L82 PathProgramCache]: Analyzing trace with hash -612476146, now seen corresponding path program 1 times [2018-10-22 15:56:26,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:26,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:26,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:26,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:26,222 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:26,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:26,866 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:56:26,866 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-10-22 15:56:26,866 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [17], [22], [26], [32], [37], [39], [43], [45], [48], [53], [55], [61], [67], [70], [76], [82], [89], [91], [93], [98], [104], [105], [109], [113], [116], [118], [124], [126], [127], [128], [130] [2018-10-22 15:56:26,868 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:56:26,869 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:56:35,002 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:56:35,002 INFO L272 AbstractInterpreter]: Visited 36 different actions 964 times. Merged at 23 different actions 794 times. Widened at 3 different actions 94 times. Found 2 fixpoints after 2 different actions. Largest state had 52 variables. [2018-10-22 15:56:35,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:35,011 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:56:35,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:35,011 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:56:35,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:35,019 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:56:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:35,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:35,233 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:35,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:56:35,538 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:56:35,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:35,596 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:56:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:56:35,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:56:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:35,732 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:56:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:56:35,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:56:35,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 24 [2018-10-22 15:56:35,796 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:56:35,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:56:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:56:35,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:56:35,800 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand 16 states. [2018-10-22 15:56:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:56:36,456 INFO L93 Difference]: Finished difference Result 211 states and 255 transitions. [2018-10-22 15:56:36,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:56:36,456 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-10-22 15:56:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:56:36,460 INFO L225 Difference]: With dead ends: 211 [2018-10-22 15:56:36,460 INFO L226 Difference]: Without dead ends: 209 [2018-10-22 15:56:36,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:56:36,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-22 15:56:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 158. [2018-10-22 15:56:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-22 15:56:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 198 transitions. [2018-10-22 15:56:36,471 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 198 transitions. Word has length 42 [2018-10-22 15:56:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:56:36,472 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 198 transitions. [2018-10-22 15:56:36,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:56:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 198 transitions. [2018-10-22 15:56:36,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 15:56:36,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:56:36,474 INFO L375 BasicCegarLoop]: trace histogram [3, 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] [2018-10-22 15:56:36,474 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:56:36,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:56:36,474 INFO L82 PathProgramCache]: Analyzing trace with hash -555217844, now seen corresponding path program 1 times [2018-10-22 15:56:36,474 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:56:36,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:36,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:56:36,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:56:36,475 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:56:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 15:56:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 15:56:36,560 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 15:56:36,585 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,586 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,587 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,587 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,587 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,588 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,588 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,588 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,589 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,590 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,590 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,590 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,591 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,591 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,591 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,592 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,593 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,593 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,593 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,598 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,598 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,599 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,599 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,599 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,599 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,603 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,603 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,603 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,604 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,604 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,604 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,604 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,606 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,606 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,606 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,607 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,607 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,607 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,607 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,609 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,610 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,610 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,610 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,611 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,611 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,611 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,611 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,612 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,612 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,612 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,612 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,618 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,619 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,619 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,620 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,620 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,620 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,620 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,621 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,621 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,621 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,621 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,625 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,625 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-22 15:56:36,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:56:36 BoogieIcfgContainer [2018-10-22 15:56:36,657 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:56:36,658 INFO L168 Benchmark]: Toolchain (without parser) took 45950.70 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 4.0 GB in the end (delta: -2.6 GB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:56:36,659 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:56:36,660 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:56:36,661 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:56:36,661 INFO L168 Benchmark]: Boogie Preprocessor took 34.52 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:56:36,662 INFO L168 Benchmark]: RCFGBuilder took 727.24 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -761.8 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2018-10-22 15:56:36,663 INFO L168 Benchmark]: TraceAbstraction took 44819.13 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.2 GB in the beginning and 4.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 113.5 MB. Max. memory is 7.1 GB. [2018-10-22 15:56:36,667 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 53.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.52 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 727.24 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -761.8 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 44819.13 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.2 GB in the beginning and 4.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 113.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L75] CALL char A [2 + 2 + 4 +1]; [L75] RET char A [2 + 2 + 4 +1]; [L76] CALL A[2 + 2 + 4] = 0 [L76] RET A[2 + 2 + 4] = 0 [L77] CALL parse_expression_list (A) [L49] int start=0, i=-1, j=-1; [L50] CALL char str2[2]; [L50] RET char str2[2]; [L51] COND FALSE !(!str) [L53] i++ [L54] CALL str[i] [L54] RET str[i] [L55] case 0: [L70] CALL, EXPR str[i] [L70] RET, EXPR str[i] [L70] COND TRUE str[i] != 0 [L53] i++ [L54] CALL str[i] [L54] RET str[i] [L55] case 0: [L70] CALL, EXPR str[i] [L70] RET, EXPR str[i] [L70] COND TRUE str[i] != 0 [L53] i++ [L54] CALL str[i] [L54] RET str[i] [L55] case 0: [L56] CALL, EXPR str[start] [L56] RET, EXPR str[start] [L56] (str[start] == ' ') || (str[start] == '\t') [L56] CALL, EXPR str[start] [L56] RET, EXPR str[start] [L56] (str[start] == ' ') || (str[start] == '\t') [L56] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L57] CALL, EXPR str[start] [L57] RET, EXPR str[start] [L57] COND FALSE !(str[start] == '"') [L58] j = i-1 [L59] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L59] CALL, EXPR str[j] [L59] RET, EXPR str[j] [L59] EXPR (str[j] == ' ') || (str[j] == '\t') [L59] CALL, EXPR str[j] [L59] RET, EXPR str[j] [L59] EXPR (str[j] == ' ') || (str[j] == '\t') [L59] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L59] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L60] (0 < j) && (str[j] == '"') [L60] CALL, EXPR str[j] [L60] RET, EXPR str[j] [L60] (0 < j) && (str[j] == '"') [L60] COND FALSE !((0 < j) && (str[j] == '"')) [L61] COND TRUE start<=j [L62] FCALL r_strncpy(str2, str+start, j-start+1) [L63] CALL __VERIFIER_assert(j - start + 1 < 2) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 1 error locations. UNSAFE Result, 44.7s OverallTime, 13 OverallIterations, 3 TraceHistogramMax, 4.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 574 SDtfs, 1003 SDslu, 2020 SDs, 0 SdLazy, 1406 SolverSat, 201 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 756 GetRequests, 610 SyntacticMatches, 25 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=158occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 32.9s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 288 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 782 NumberOfCodeBlocks, 782 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1038 ConstructedInterpolants, 0 QuantifiedInterpolants, 152089 SizeOfPredicates, 22 NumberOfNonLiveVariables, 2010 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 28 InterpolantComputations, 8 PerfectInterpolantSequences, 6/151 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...