/usr/bin/java -ea -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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 20:24:08,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 20:24:08,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 20:24:08,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 20:24:08,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 20:24:08,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 20:24:08,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 20:24:08,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 20:24:08,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 20:24:08,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 20:24:08,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 20:24:08,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 20:24:08,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 20:24:08,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 20:24:08,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 20:24:08,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 20:24:08,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 20:24:08,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 20:24:08,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 20:24:08,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 20:24:08,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 20:24:08,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 20:24:08,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 20:24:08,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 20:24:08,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-10 20:24:09,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 20:24:09,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 20:24:09,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 20:24:09,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-10 20:24:09,017 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 20:24:09,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 20:24:09,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 20:24:09,019 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 20:24:09,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 20:24:09,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 20:24:09,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 20:24:09,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 20:24:09,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 20:24:09,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 20:24:09,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 20:24:09,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 20:24:09,021 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 20:24:09,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 20:24:09,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 20:24:09,021 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-10 20:24:09,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 20:24:09,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 20:24:09,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 20:24:09,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 20:24:09,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-10 20:24:09,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 20:24:09,023 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-10 20:24:09,318 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 20:24:09,331 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 20:24:09,334 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 20:24:09,336 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 20:24:09,336 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 20:24:09,337 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-07-10 20:24:09,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44d5ab671/308264ee8bff4bc6988b3238a1c5ce34/FLAG6501d53ce [2020-07-10 20:24:09,850 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 20:24:09,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2020-07-10 20:24:09,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44d5ab671/308264ee8bff4bc6988b3238a1c5ce34/FLAG6501d53ce [2020-07-10 20:24:10,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44d5ab671/308264ee8bff4bc6988b3238a1c5ce34 [2020-07-10 20:24:10,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 20:24:10,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 20:24:10,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 20:24:10,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 20:24:10,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 20:24:10,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 08:24:10" (1/1) ... [2020-07-10 20:24:10,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b902dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10, skipping insertion in model container [2020-07-10 20:24:10,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 08:24:10" (1/1) ... [2020-07-10 20:24:10,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 20:24:10,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 20:24:10,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 20:24:10,433 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 20:24:10,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 20:24:10,466 INFO L208 MainTranslator]: Completed translation [2020-07-10 20:24:10,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10 WrapperNode [2020-07-10 20:24:10,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 20:24:10,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 20:24:10,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 20:24:10,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 20:24:10,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10" (1/1) ... [2020-07-10 20:24:10,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10" (1/1) ... [2020-07-10 20:24:10,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10" (1/1) ... [2020-07-10 20:24:10,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10" (1/1) ... [2020-07-10 20:24:10,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10" (1/1) ... [2020-07-10 20:24:10,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10" (1/1) ... [2020-07-10 20:24:10,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10" (1/1) ... [2020-07-10 20:24:10,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 20:24:10,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 20:24:10,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 20:24:10,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 20:24:10,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10" (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 [2020-07-10 20:24:10,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 20:24:10,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 20:24:10,652 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-10 20:24:10,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-10 20:24:10,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 20:24:10,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 20:24:10,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-10 20:24:10,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-10 20:24:10,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-10 20:24:10,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-10 20:24:10,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 20:24:10,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 20:24:10,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 20:24:10,943 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 20:24:10,943 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-10 20:24:10,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 08:24:10 BoogieIcfgContainer [2020-07-10 20:24:10,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 20:24:10,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 20:24:10,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 20:24:10,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 20:24:10,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 08:24:10" (1/3) ... [2020-07-10 20:24:10,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2199c887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 08:24:10, skipping insertion in model container [2020-07-10 20:24:10,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:24:10" (2/3) ... [2020-07-10 20:24:10,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2199c887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 08:24:10, skipping insertion in model container [2020-07-10 20:24:10,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 08:24:10" (3/3) ... [2020-07-10 20:24:10,956 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-07-10 20:24:10,967 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-10 20:24:10,974 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 20:24:10,990 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 20:24:11,011 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 20:24:11,012 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 20:24:11,012 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-10 20:24:11,012 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 20:24:11,012 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 20:24:11,012 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 20:24:11,012 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 20:24:11,013 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 20:24:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-10 20:24:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-10 20:24:11,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 20:24:11,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 20:24:11,051 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 20:24:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 20:24:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2141903635, now seen corresponding path program 1 times [2020-07-10 20:24:11,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 20:24:11,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460471478] [2020-07-10 20:24:11,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 20:24:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:24:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:24:11,324 INFO L280 TraceCheckUtils]: 0: Hoare triple {37#true} assume true; {37#true} is VALID [2020-07-10 20:24:11,325 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {37#true} {37#true} #67#return; {37#true} is VALID [2020-07-10 20:24:11,327 INFO L263 TraceCheckUtils]: 0: Hoare triple {37#true} call ULTIMATE.init(); {37#true} is VALID [2020-07-10 20:24:11,328 INFO L280 TraceCheckUtils]: 1: Hoare triple {37#true} assume true; {37#true} is VALID [2020-07-10 20:24:11,328 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {37#true} {37#true} #67#return; {37#true} is VALID [2020-07-10 20:24:11,329 INFO L263 TraceCheckUtils]: 3: Hoare triple {37#true} call #t~ret3 := main(); {37#true} is VALID [2020-07-10 20:24:11,329 INFO L280 TraceCheckUtils]: 4: Hoare triple {37#true} havoc ~offset~0; {37#true} is VALID [2020-07-10 20:24:11,330 INFO L280 TraceCheckUtils]: 5: Hoare triple {37#true} havoc ~length~0; {37#true} is VALID [2020-07-10 20:24:11,330 INFO L280 TraceCheckUtils]: 6: Hoare triple {37#true} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {37#true} is VALID [2020-07-10 20:24:11,331 INFO L280 TraceCheckUtils]: 7: Hoare triple {37#true} ~nlen~0 := #t~nondet0; {37#true} is VALID [2020-07-10 20:24:11,331 INFO L280 TraceCheckUtils]: 8: Hoare triple {37#true} havoc #t~nondet0; {37#true} is VALID [2020-07-10 20:24:11,332 INFO L280 TraceCheckUtils]: 9: Hoare triple {37#true} havoc ~i~0; {37#true} is VALID [2020-07-10 20:24:11,332 INFO L280 TraceCheckUtils]: 10: Hoare triple {37#true} havoc ~j~0; {37#true} is VALID [2020-07-10 20:24:11,333 INFO L280 TraceCheckUtils]: 11: Hoare triple {37#true} ~i~0 := 0; {37#true} is VALID [2020-07-10 20:24:11,335 INFO L280 TraceCheckUtils]: 12: Hoare triple {37#true} assume !!(~i~0 < ~nlen~0); {41#(< main_~i~0 main_~nlen~0)} is VALID [2020-07-10 20:24:11,336 INFO L280 TraceCheckUtils]: 13: Hoare triple {41#(< main_~i~0 main_~nlen~0)} ~j~0 := 0; {41#(< main_~i~0 main_~nlen~0)} is VALID [2020-07-10 20:24:11,337 INFO L280 TraceCheckUtils]: 14: Hoare triple {41#(< main_~i~0 main_~nlen~0)} assume !!(~j~0 < 8); {41#(< main_~i~0 main_~nlen~0)} is VALID [2020-07-10 20:24:11,340 INFO L263 TraceCheckUtils]: 15: Hoare triple {41#(< main_~i~0 main_~nlen~0)} call __VERIFIER_assert((if 0 <= ~nlen~0 - 1 - ~i~0 then 1 else 0)); {42#(not (= 0 |__VERIFIER_assert_#in~cond|))} is VALID [2020-07-10 20:24:11,342 INFO L280 TraceCheckUtils]: 16: Hoare triple {42#(not (= 0 |__VERIFIER_assert_#in~cond|))} ~cond := #in~cond; {43#(not (= 0 __VERIFIER_assert_~cond))} is VALID [2020-07-10 20:24:11,343 INFO L280 TraceCheckUtils]: 17: Hoare triple {43#(not (= 0 __VERIFIER_assert_~cond))} assume 0 == ~cond; {38#false} is VALID [2020-07-10 20:24:11,344 INFO L280 TraceCheckUtils]: 18: Hoare triple {38#false} assume !false; {38#false} is VALID [2020-07-10 20:24:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 20:24:11,347 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 20:24:11,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460471478] [2020-07-10 20:24:11,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 20:24:11,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-10 20:24:11,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862800571] [2020-07-10 20:24:11,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-10 20:24:11,364 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 20:24:11,368 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-10 20:24:11,409 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:24:11,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-10 20:24:11,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 20:24:11,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-10 20:24:11,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-10 20:24:11,421 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-07-10 20:24:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:24:11,712 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2020-07-10 20:24:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-10 20:24:11,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-10 20:24:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 20:24:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 20:24:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2020-07-10 20:24:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 20:24:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2020-07-10 20:24:11,731 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 72 transitions. [2020-07-10 20:24:11,851 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 72 edges. 72 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:24:11,866 INFO L225 Difference]: With dead ends: 60 [2020-07-10 20:24:11,866 INFO L226 Difference]: Without dead ends: 33 [2020-07-10 20:24:11,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-10 20:24:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-10 20:24:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-10 20:24:11,954 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 20:24:11,954 INFO L82 GeneralOperation]: Start isEquivalent. First operand 33 states. Second operand 33 states. [2020-07-10 20:24:11,955 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand 33 states. [2020-07-10 20:24:11,955 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 33 states. [2020-07-10 20:24:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:24:11,960 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-07-10 20:24:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-10 20:24:11,961 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 20:24:11,961 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 20:24:11,961 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand 33 states. [2020-07-10 20:24:11,961 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 33 states. [2020-07-10 20:24:11,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:24:11,966 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-07-10 20:24:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-10 20:24:11,966 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 20:24:11,967 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 20:24:11,967 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 20:24:11,967 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 20:24:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-10 20:24:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-10 20:24:11,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 19 [2020-07-10 20:24:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 20:24:11,973 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-10 20:24:11,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-10 20:24:11,973 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 33 states and 34 transitions. [2020-07-10 20:24:12,020 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 34 edges. 34 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:24:12,021 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-10 20:24:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-10 20:24:12,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 20:24:12,022 INFO L422 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] [2020-07-10 20:24:12,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 20:24:12,023 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 20:24:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 20:24:12,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1520201371, now seen corresponding path program 1 times [2020-07-10 20:24:12,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 20:24:12,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391183048] [2020-07-10 20:24:12,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 20:24:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:24:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:24:12,133 INFO L280 TraceCheckUtils]: 0: Hoare triple {300#true} assume true; {300#true} is VALID [2020-07-10 20:24:12,133 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {300#true} {300#true} #67#return; {300#true} is VALID [2020-07-10 20:24:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:24:12,143 INFO L280 TraceCheckUtils]: 0: Hoare triple {300#true} ~cond := #in~cond; {300#true} is VALID [2020-07-10 20:24:12,143 INFO L280 TraceCheckUtils]: 1: Hoare triple {300#true} assume !(0 == ~cond); {300#true} is VALID [2020-07-10 20:24:12,144 INFO L280 TraceCheckUtils]: 2: Hoare triple {300#true} assume true; {300#true} is VALID [2020-07-10 20:24:12,145 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {300#true} {304#(< 0 (+ main_~i~0 1))} #71#return; {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-10 20:24:12,145 INFO L263 TraceCheckUtils]: 0: Hoare triple {300#true} call ULTIMATE.init(); {300#true} is VALID [2020-07-10 20:24:12,146 INFO L280 TraceCheckUtils]: 1: Hoare triple {300#true} assume true; {300#true} is VALID [2020-07-10 20:24:12,146 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {300#true} {300#true} #67#return; {300#true} is VALID [2020-07-10 20:24:12,146 INFO L263 TraceCheckUtils]: 3: Hoare triple {300#true} call #t~ret3 := main(); {300#true} is VALID [2020-07-10 20:24:12,147 INFO L280 TraceCheckUtils]: 4: Hoare triple {300#true} havoc ~offset~0; {300#true} is VALID [2020-07-10 20:24:12,147 INFO L280 TraceCheckUtils]: 5: Hoare triple {300#true} havoc ~length~0; {300#true} is VALID [2020-07-10 20:24:12,147 INFO L280 TraceCheckUtils]: 6: Hoare triple {300#true} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {300#true} is VALID [2020-07-10 20:24:12,147 INFO L280 TraceCheckUtils]: 7: Hoare triple {300#true} ~nlen~0 := #t~nondet0; {300#true} is VALID [2020-07-10 20:24:12,148 INFO L280 TraceCheckUtils]: 8: Hoare triple {300#true} havoc #t~nondet0; {300#true} is VALID [2020-07-10 20:24:12,148 INFO L280 TraceCheckUtils]: 9: Hoare triple {300#true} havoc ~i~0; {300#true} is VALID [2020-07-10 20:24:12,148 INFO L280 TraceCheckUtils]: 10: Hoare triple {300#true} havoc ~j~0; {300#true} is VALID [2020-07-10 20:24:12,149 INFO L280 TraceCheckUtils]: 11: Hoare triple {300#true} ~i~0 := 0; {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-10 20:24:12,150 INFO L280 TraceCheckUtils]: 12: Hoare triple {304#(< 0 (+ main_~i~0 1))} assume !!(~i~0 < ~nlen~0); {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-10 20:24:12,151 INFO L280 TraceCheckUtils]: 13: Hoare triple {304#(< 0 (+ main_~i~0 1))} ~j~0 := 0; {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-10 20:24:12,152 INFO L280 TraceCheckUtils]: 14: Hoare triple {304#(< 0 (+ main_~i~0 1))} assume !!(~j~0 < 8); {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-10 20:24:12,152 INFO L263 TraceCheckUtils]: 15: Hoare triple {304#(< 0 (+ main_~i~0 1))} call __VERIFIER_assert((if 0 <= ~nlen~0 - 1 - ~i~0 then 1 else 0)); {300#true} is VALID [2020-07-10 20:24:12,153 INFO L280 TraceCheckUtils]: 16: Hoare triple {300#true} ~cond := #in~cond; {300#true} is VALID [2020-07-10 20:24:12,153 INFO L280 TraceCheckUtils]: 17: Hoare triple {300#true} assume !(0 == ~cond); {300#true} is VALID [2020-07-10 20:24:12,153 INFO L280 TraceCheckUtils]: 18: Hoare triple {300#true} assume true; {300#true} is VALID [2020-07-10 20:24:12,154 INFO L275 TraceCheckUtils]: 19: Hoare quadruple {300#true} {304#(< 0 (+ main_~i~0 1))} #71#return; {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-10 20:24:12,156 INFO L263 TraceCheckUtils]: 20: Hoare triple {304#(< 0 (+ main_~i~0 1))} call __VERIFIER_assert((if ~nlen~0 - 1 - ~i~0 < ~nlen~0 then 1 else 0)); {309#(not (= 0 |__VERIFIER_assert_#in~cond|))} is VALID [2020-07-10 20:24:12,156 INFO L280 TraceCheckUtils]: 21: Hoare triple {309#(not (= 0 |__VERIFIER_assert_#in~cond|))} ~cond := #in~cond; {310#(not (= 0 __VERIFIER_assert_~cond))} is VALID [2020-07-10 20:24:12,157 INFO L280 TraceCheckUtils]: 22: Hoare triple {310#(not (= 0 __VERIFIER_assert_~cond))} assume 0 == ~cond; {301#false} is VALID [2020-07-10 20:24:12,158 INFO L280 TraceCheckUtils]: 23: Hoare triple {301#false} assume !false; {301#false} is VALID [2020-07-10 20:24:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 20:24:12,160 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 20:24:12,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391183048] [2020-07-10 20:24:12,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 20:24:12,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-10 20:24:12,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361040607] [2020-07-10 20:24:12,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-10 20:24:12,165 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 20:24:12,166 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-10 20:24:12,201 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:24:12,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-10 20:24:12,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 20:24:12,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-10 20:24:12,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-10 20:24:12,202 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 5 states. [2020-07-10 20:24:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:24:12,457 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-07-10 20:24:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-10 20:24:12,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-10 20:24:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 20:24:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 20:24:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 49 transitions. [2020-07-10 20:24:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 20:24:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 49 transitions. [2020-07-10 20:24:12,465 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 49 transitions. [2020-07-10 20:24:12,528 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 49 edges. 49 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:24:12,531 INFO L225 Difference]: With dead ends: 49 [2020-07-10 20:24:12,531 INFO L226 Difference]: Without dead ends: 47 [2020-07-10 20:24:12,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-10 20:24:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-10 20:24:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-07-10 20:24:12,592 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 20:24:12,592 INFO L82 GeneralOperation]: Start isEquivalent. First operand 47 states. Second operand 45 states. [2020-07-10 20:24:12,592 INFO L74 IsIncluded]: Start isIncluded. First operand 47 states. Second operand 45 states. [2020-07-10 20:24:12,592 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 45 states. [2020-07-10 20:24:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:24:12,597 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-07-10 20:24:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-07-10 20:24:12,599 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 20:24:12,599 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 20:24:12,599 INFO L74 IsIncluded]: Start isIncluded. First operand 45 states. Second operand 47 states. [2020-07-10 20:24:12,599 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 47 states. [2020-07-10 20:24:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:24:12,603 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-07-10 20:24:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-07-10 20:24:12,604 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 20:24:12,605 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 20:24:12,605 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 20:24:12,605 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 20:24:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-10 20:24:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-07-10 20:24:12,609 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 24 [2020-07-10 20:24:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 20:24:12,609 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-07-10 20:24:12,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-10 20:24:12,609 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 45 states and 48 transitions. [2020-07-10 20:24:12,669 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 48 edges. 48 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:24:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-07-10 20:24:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-10 20:24:12,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 20:24:12,671 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-10 20:24:12,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 20:24:12,671 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 20:24:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 20:24:12,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1589830701, now seen corresponding path program 1 times [2020-07-10 20:24:12,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 20:24:12,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115055147] [2020-07-10 20:24:12,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 20:24:12,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-10 20:24:12,682 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-10 20:24:12,689 INFO L168 Benchmark]: Toolchain (without parser) took 2464.93 ms. Allocated memory was 144.7 MB in the beginning and 233.8 MB in the end (delta: 89.1 MB). Free memory was 101.7 MB in the beginning and 107.4 MB in the end (delta: -5.7 MB). Peak memory consumption was 83.5 MB. Max. memory is 7.1 GB. [2020-07-10 20:24:12,690 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.7 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-10 20:24:12,691 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.24 ms. Allocated memory is still 144.7 MB. Free memory was 101.5 MB in the beginning and 91.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-10 20:24:12,692 INFO L168 Benchmark]: Boogie Preprocessor took 27.94 ms. Allocated memory is still 144.7 MB. Free memory was 91.8 MB in the beginning and 90.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-10 20:24:12,693 INFO L168 Benchmark]: RCFGBuilder took 452.12 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.2 MB in the beginning and 162.4 MB in the end (delta: -72.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-10 20:24:12,694 INFO L168 Benchmark]: TraceAbstraction took 1736.86 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 161.7 MB in the beginning and 107.4 MB in the end (delta: 54.3 MB). Peak memory consumption was 86.3 MB. Max. memory is 7.1 GB. [2020-07-10 20:24:12,698 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.7 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.24 ms. Allocated memory is still 144.7 MB. Free memory was 101.5 MB in the beginning and 91.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.94 ms. Allocated memory is still 144.7 MB. Free memory was 91.8 MB in the beginning and 90.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 452.12 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.2 MB in the beginning and 162.4 MB in the end (delta: -72.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1736.86 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 161.7 MB in the beginning and 107.4 MB in the end (delta: 54.3 MB). Peak memory consumption was 86.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...