java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 16:29:42,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 16:29:42,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 16:29:42,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 16:29:42,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 16:29:42,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 16:29:42,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 16:29:42,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 16:29:42,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 16:29:42,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 16:29:42,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 16:29:42,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 16:29:42,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 16:29:42,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 16:29:42,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 16:29:42,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 16:29:42,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 16:29:42,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 16:29:42,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 16:29:42,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 16:29:42,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 16:29:42,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 16:29:42,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 16:29:42,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 16:29:42,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-02 16:29:42,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-02 16:29:42,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-02 16:29:42,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-02 16:29:42,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-02 16:29:42,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-02 16:29:42,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 16:29:42,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 16:29:42,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 16:29:42,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 16:29:42,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 16:29:42,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 16:29:42,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 16:29:42,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 16:29:42,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 16:29:42,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 16:29:42,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 16:29:42,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 16:29:42,807 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 16:29:42,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 16:29:42,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 16:29:42,808 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 16:29:42,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 16:29:42,810 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 16:29:42,810 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 16:29:42,811 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 16:29:42,811 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 16:29:42,811 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 16:29:42,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 16:29:42,813 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 16:29:42,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 16:29:42,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 16:29:42,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 16:29:42,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 16:29:42,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 16:29:42,815 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 16:29:42,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 16:29:42,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 16:29:42,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 16:29:42,816 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 16:29:42,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 16:29:42,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:29:42,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 16:29:42,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 16:29:42,817 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 16:29:42,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 16:29:42,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 16:29:42,818 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 16:29:42,858 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 16:29:42,868 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 16:29:42,872 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 16:29:42,873 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 16:29:42,874 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 16:29:42,874 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-10-02 16:29:42,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d33daeb1d/e73691e5f2ac43d28b111e2af31b0437/FLAGdaff9e198 [2019-10-02 16:29:43,321 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 16:29:43,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-10-02 16:29:43,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d33daeb1d/e73691e5f2ac43d28b111e2af31b0437/FLAGdaff9e198 [2019-10-02 16:29:43,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d33daeb1d/e73691e5f2ac43d28b111e2af31b0437 [2019-10-02 16:29:43,783 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 16:29:43,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 16:29:43,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 16:29:43,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 16:29:43,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 16:29:43,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:29:43" (1/1) ... [2019-10-02 16:29:43,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:43, skipping insertion in model container [2019-10-02 16:29:43,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:29:43" (1/1) ... [2019-10-02 16:29:43,803 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 16:29:43,829 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 16:29:44,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:29:44,109 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 16:29:44,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:29:44,252 INFO L192 MainTranslator]: Completed translation [2019-10-02 16:29:44,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44 WrapperNode [2019-10-02 16:29:44,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 16:29:44,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 16:29:44,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 16:29:44,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 16:29:44,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 16:29:44,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 16:29:44,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 16:29:44,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 16:29:44,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:29:44,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 16:29:44,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 16:29:44,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 16:29:44,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 16:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 16:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-02 16:29:44,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 16:29:44,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-02 16:29:44,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 16:29:44,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 16:29:44,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 16:29:44,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 16:29:44,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 16:29:44,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 16:29:44,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 16:29:44,846 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 16:29:44,846 INFO L283 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-02 16:29:44,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:29:44 BoogieIcfgContainer [2019-10-02 16:29:44,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 16:29:44,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 16:29:44,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 16:29:44,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 16:29:44,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 04:29:43" (1/3) ... [2019-10-02 16:29:44,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3d03ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:29:44, skipping insertion in model container [2019-10-02 16:29:44,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (2/3) ... [2019-10-02 16:29:44,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3d03ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:29:44, skipping insertion in model container [2019-10-02 16:29:44,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:29:44" (3/3) ... [2019-10-02 16:29:44,856 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2019-10-02 16:29:44,871 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 16:29:44,883 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 16:29:44,900 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 16:29:44,925 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 16:29:44,925 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 16:29:44,925 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 16:29:44,925 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 16:29:44,925 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 16:29:44,926 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 16:29:44,926 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 16:29:44,926 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 16:29:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2019-10-02 16:29:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-02 16:29:44,950 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:44,951 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:44,953 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:44,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:44,958 INFO L82 PathProgramCache]: Analyzing trace with hash -298961335, now seen corresponding path program 1 times [2019-10-02 16:29:44,961 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:45,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:45,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,014 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:29:45,120 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:29:45,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 16:29:45,120 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:45,128 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 16:29:45,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 16:29:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:29:45,148 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 2 states. [2019-10-02 16:29:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:45,166 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2019-10-02 16:29:45,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 16:29:45,168 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-10-02 16:29:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:45,178 INFO L225 Difference]: With dead ends: 52 [2019-10-02 16:29:45,178 INFO L226 Difference]: Without dead ends: 44 [2019-10-02 16:29:45,184 INFO L640 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 [2019-10-02 16:29:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-02 16:29:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-02 16:29:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-02 16:29:45,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-10-02 16:29:45,227 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2019-10-02 16:29:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:45,228 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-10-02 16:29:45,228 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 16:29:45,229 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-10-02 16:29:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-02 16:29:45,231 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:45,231 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:45,232 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:45,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:45,232 INFO L82 PathProgramCache]: Analyzing trace with hash 351831333, now seen corresponding path program 1 times [2019-10-02 16:29:45,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:45,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:45,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,240 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:29:45,393 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:29:45,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 16:29:45,393 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:45,399 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 16:29:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 16:29:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 16:29:45,400 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 5 states. [2019-10-02 16:29:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:45,525 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2019-10-02 16:29:45,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 16:29:45,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-10-02 16:29:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:45,529 INFO L225 Difference]: With dead ends: 66 [2019-10-02 16:29:45,530 INFO L226 Difference]: Without dead ends: 63 [2019-10-02 16:29:45,531 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 16:29:45,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-02 16:29:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-02 16:29:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-02 16:29:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2019-10-02 16:29:45,549 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2019-10-02 16:29:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:45,550 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2019-10-02 16:29:45,550 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 16:29:45,550 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2019-10-02 16:29:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-02 16:29:45,554 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:45,555 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:45,555 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:45,557 INFO L82 PathProgramCache]: Analyzing trace with hash 615337315, now seen corresponding path program 1 times [2019-10-02 16:29:45,557 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:45,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:45,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,563 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-02 16:29:45,653 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:29:45,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:29:45,653 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:45,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:29:45,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:29:45,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:45,654 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 3 states. [2019-10-02 16:29:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:45,736 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2019-10-02 16:29:45,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:29:45,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-02 16:29:45,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:45,739 INFO L225 Difference]: With dead ends: 65 [2019-10-02 16:29:45,739 INFO L226 Difference]: Without dead ends: 65 [2019-10-02 16:29:45,740 INFO L640 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 [2019-10-02 16:29:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-02 16:29:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-02 16:29:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-02 16:29:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-10-02 16:29:45,748 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 34 [2019-10-02 16:29:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:45,748 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-10-02 16:29:45,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:29:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-10-02 16:29:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-02 16:29:45,750 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:45,750 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:45,751 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1838268449, now seen corresponding path program 1 times [2019-10-02 16:29:45,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:45,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:45,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,753 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-02 16:29:45,841 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:29:45,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 16:29:45,841 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:45,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 16:29:45,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 16:29:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 16:29:45,843 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 4 states. [2019-10-02 16:29:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:46,028 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2019-10-02 16:29:46,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 16:29:46,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2019-10-02 16:29:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:46,030 INFO L225 Difference]: With dead ends: 65 [2019-10-02 16:29:46,030 INFO L226 Difference]: Without dead ends: 65 [2019-10-02 16:29:46,031 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 16:29:46,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-02 16:29:46,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2019-10-02 16:29:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-02 16:29:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-10-02 16:29:46,037 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 36 [2019-10-02 16:29:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:46,038 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-10-02 16:29:46,038 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 16:29:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-10-02 16:29:46,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-02 16:29:46,040 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:46,040 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:46,042 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:46,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1356508047, now seen corresponding path program 1 times [2019-10-02 16:29:46,043 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:46,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:46,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:46,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:46,045 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-02 16:29:46,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 16:29:46,187 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 16:29:46,188 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 55 with the following transitions: [2019-10-02 16:29:46,190 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [8], [14], [16], [18], [22], [28], [30], [32], [36], [42], [44], [46], [50], [56], [58], [60], [64], [70], [72], [74], [78], [84], [86], [88], [92], [98], [100], [102], [106], [112], [114], [116], [120], [126], [128], [130], [134], [140], [142], [144], [148], [154], [156], [158], [169], [172], [174], [180], [181], [182], [184] [2019-10-02 16:29:46,244 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 16:29:46,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 16:29:46,329 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 16:29:46,331 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 2. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Never found a fixpoint. Largest state had 42 variables. [2019-10-02 16:29:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:46,335 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 16:29:46,389 INFO L227 lantSequenceWeakener]: Weakened 5 states. On average, predicates are now at 96.67% of their original sizes. [2019-10-02 16:29:46,389 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 16:29:46,396 INFO L420 sIntCurrentIteration]: We unified 53 AI predicates to 53 [2019-10-02 16:29:46,396 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 16:29:46,397 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 16:29:46,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-10-02 16:29:46,397 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:46,398 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:29:46,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:29:46,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:46,399 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 3 states. [2019-10-02 16:29:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:46,400 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2019-10-02 16:29:46,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:29:46,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2019-10-02 16:29:46,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:46,401 INFO L225 Difference]: With dead ends: 7 [2019-10-02 16:29:46,401 INFO L226 Difference]: Without dead ends: 0 [2019-10-02 16:29:46,402 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-02 16:29:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-02 16:29:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-02 16:29:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-02 16:29:46,403 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2019-10-02 16:29:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:46,403 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-02 16:29:46,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:29:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-02 16:29:46,403 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-02 16:29:46,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 04:29:46 BoogieIcfgContainer [2019-10-02 16:29:46,409 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-02 16:29:46,411 INFO L168 Benchmark]: Toolchain (without parser) took 2626.08 ms. Allocated memory was 138.9 MB in the beginning and 220.7 MB in the end (delta: 81.8 MB). Free memory was 86.6 MB in the beginning and 172.7 MB in the end (delta: -86.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-02 16:29:46,412 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 105.0 MB in the beginning and 104.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-02 16:29:46,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 467.85 ms. Allocated memory was 138.9 MB in the beginning and 198.2 MB in the end (delta: 59.2 MB). Free memory was 86.3 MB in the beginning and 174.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:46,414 INFO L168 Benchmark]: Boogie Preprocessor took 45.95 ms. Allocated memory is still 198.2 MB. Free memory was 174.5 MB in the beginning and 172.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:46,415 INFO L168 Benchmark]: RCFGBuilder took 548.29 ms. Allocated memory is still 198.2 MB. Free memory was 172.6 MB in the beginning and 150.5 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:46,417 INFO L168 Benchmark]: TraceAbstraction took 1559.53 ms. Allocated memory was 198.2 MB in the beginning and 220.7 MB in the end (delta: 22.5 MB). Free memory was 150.5 MB in the beginning and 172.7 MB in the end (delta: -22.2 MB). Peak memory consumption was 318.9 kB. Max. memory is 7.1 GB. [2019-10-02 16:29:46,421 INFO L335 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 138.9 MB. Free memory was 105.0 MB in the beginning and 104.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 467.85 ms. Allocated memory was 138.9 MB in the beginning and 198.2 MB in the end (delta: 59.2 MB). Free memory was 86.3 MB in the beginning and 174.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.95 ms. Allocated memory is still 198.2 MB. Free memory was 174.5 MB in the beginning and 172.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 548.29 ms. Allocated memory is still 198.2 MB. Free memory was 172.6 MB in the beginning and 150.5 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1559.53 ms. Allocated memory was 198.2 MB in the beginning and 220.7 MB in the end (delta: 22.5 MB). Free memory was 150.5 MB in the beginning and 172.7 MB in the end (delta: -22.2 MB). Peak memory consumption was 318.9 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 52 locations, 1 error locations. SAFE Result, 1.4s OverallTime, 5 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 186 SDtfs, 71 SDslu, 159 SDs, 0 SdLazy, 141 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9811320754716981 AbsIntWeakeningRatio, 0.7924528301886793 AbsIntAvgWeakeningVarsNumRemoved, 0.3018867924528302 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 188 NumberOfCodeBlocks, 188 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 183 ConstructedInterpolants, 0 QuantifiedInterpolants, 10131 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 13/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...