/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/divbin.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:38:50,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:38:50,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:38:51,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 00:38:51,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 00:38:51,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 00:38:51,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 00:38:51,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 00:38:51,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 00:38:51,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 00:38:51,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 00:38:51,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 00:38:51,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 00:38:51,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 00:38:51,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 00:38:51,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 00:38:51,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 00:38:51,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 00:38:51,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 00:38:51,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 00:38:51,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 00:38:51,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 00:38:51,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 00:38:51,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 00:38:51,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-03 00:38:51,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-03 00:38:51,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-03 00:38:51,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-03 00:38:51,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-03 00:38:51,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-03 00:38:51,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 00:38:51,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 00:38:51,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 00:38:51,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 00:38:51,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 00:38:51,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 00:38:51,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 00:38:51,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 00:38:51,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:38:51,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:38:51,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:38:51,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:38:51,107 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:38:51,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:38:51,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:38:51,109 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:38:51,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:38:51,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:38:51,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:38:51,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:38:51,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:38:51,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:38:51,111 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:38:51,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:38:51,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:38:51,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:38:51,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:38:51,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:38:51,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:38:51,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:38:51,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:38:51,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:38:51,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:38:51,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:38:51,113 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:38:51,114 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:38:51,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:38:51,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:38:51,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:38:51,452 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:38:51,454 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:38:51,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/divbin.i [2021-05-03 00:38:51,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99def6fe2/880e7915e68f4b58889b8f5080761880/FLAG5f1eba4bd [2021-05-03 00:38:52,047 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:38:52,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/divbin.i [2021-05-03 00:38:52,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99def6fe2/880e7915e68f4b58889b8f5080761880/FLAG5f1eba4bd [2021-05-03 00:38:52,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99def6fe2/880e7915e68f4b58889b8f5080761880 [2021-05-03 00:38:52,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:38:52,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:38:52,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:38:52,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:38:52,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:38:52,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:38:52" (1/1) ... [2021-05-03 00:38:52,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15237e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52, skipping insertion in model container [2021-05-03 00:38:52,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:38:52" (1/1) ... [2021-05-03 00:38:52,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:38:52,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:38:52,734 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/divbin.i[958,971] [2021-05-03 00:38:52,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:38:52,761 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:38:52,799 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/divbin.i[958,971] [2021-05-03 00:38:52,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:38:52,852 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:38:52,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52 WrapperNode [2021-05-03 00:38:52,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:38:52,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:38:52,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:38:52,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:38:52,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52" (1/1) ... [2021-05-03 00:38:52,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52" (1/1) ... [2021-05-03 00:38:52,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52" (1/1) ... [2021-05-03 00:38:52,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52" (1/1) ... [2021-05-03 00:38:52,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52" (1/1) ... [2021-05-03 00:38:52,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52" (1/1) ... [2021-05-03 00:38:52,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52" (1/1) ... [2021-05-03 00:38:52,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:38:52,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:38:52,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:38:52,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:38:52,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52" (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 [2021-05-03 00:38:52,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:38:52,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:38:52,988 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:38:52,988 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:38:52,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:38:52,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:38:52,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:38:52,989 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:38:52,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-03 00:38:52,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-03 00:38:52,990 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:38:52,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:38:52,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-03 00:38:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:38:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:38:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:38:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:38:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:38:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:38:53,318 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:38:53,319 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 00:38:53,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:38:53 BoogieIcfgContainer [2021-05-03 00:38:53,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:38:53,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:38:53,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:38:53,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:38:53,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:38:52" (1/3) ... [2021-05-03 00:38:53,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29031b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:38:53, skipping insertion in model container [2021-05-03 00:38:53,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:38:52" (2/3) ... [2021-05-03 00:38:53,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29031b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:38:53, skipping insertion in model container [2021-05-03 00:38:53,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:38:53" (3/3) ... [2021-05-03 00:38:53,336 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin.i [2021-05-03 00:38:53,342 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:38:53,346 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:38:53,360 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:38:53,377 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:38:53,378 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:38:53,378 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:38:53,378 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:38:53,378 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:38:53,378 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:38:53,378 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:38:53,378 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:38:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-03 00:38:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:38:53,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:38:53,398 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:38:53,398 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:38:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:38:53,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1345265538, now seen corresponding path program 1 times [2021-05-03 00:38:53,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:38:53,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397517387] [2021-05-03 00:38:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:38:53,481 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:38:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:53,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:38:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:53,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:38:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:53,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:38:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 00:38:53,754 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:38:53,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397517387] [2021-05-03 00:38:53,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [397517387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:38:53,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:38:53,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:38:53,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226110336] [2021-05-03 00:38:53,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:38:53,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:38:53,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:38:53,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:38:53,779 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:38:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:38:53,933 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2021-05-03 00:38:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:38:53,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-03 00:38:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:38:53,943 INFO L225 Difference]: With dead ends: 55 [2021-05-03 00:38:53,943 INFO L226 Difference]: Without dead ends: 26 [2021-05-03 00:38:53,946 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:38:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-03 00:38:53,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-03 00:38:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-03 00:38:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-05-03 00:38:54,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 23 [2021-05-03 00:38:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:38:54,004 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-05-03 00:38:54,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:38:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-05-03 00:38:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:38:54,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:38:54,008 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:38:54,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:38:54,009 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:38:54,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:38:54,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1801528411, now seen corresponding path program 1 times [2021-05-03 00:38:54,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:38:54,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422351262] [2021-05-03 00:38:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:38:54,020 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:38:54,050 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:38:54,051 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:38:54,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:38:54,071 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:38:54,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:38:54 BoogieIcfgContainer [2021-05-03 00:38:54,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:38:54,077 INFO L168 Benchmark]: Toolchain (without parser) took 1534.55 ms. Allocated memory is still 198.2 MB. Free memory was 163.3 MB in the beginning and 131.1 MB in the end (delta: 32.1 MB). Peak memory consumption was 31.8 MB. Max. memory is 8.0 GB. [2021-05-03 00:38:54,077 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 198.2 MB. Free memory was 180.1 MB in the beginning and 180.0 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:38:54,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.70 ms. Allocated memory is still 198.2 MB. Free memory was 163.1 MB in the beginning and 181.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-03 00:38:54,079 INFO L168 Benchmark]: Boogie Preprocessor took 49.84 ms. Allocated memory is still 198.2 MB. Free memory was 181.4 MB in the beginning and 179.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:38:54,080 INFO L168 Benchmark]: RCFGBuilder took 413.02 ms. Allocated memory is still 198.2 MB. Free memory was 179.8 MB in the beginning and 164.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:38:54,080 INFO L168 Benchmark]: TraceAbstraction took 744.67 ms. Allocated memory is still 198.2 MB. Free memory was 164.0 MB in the beginning and 131.1 MB in the end (delta: 32.9 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:38:54,090 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 198.2 MB. Free memory was 180.1 MB in the beginning and 180.0 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 311.70 ms. Allocated memory is still 198.2 MB. Free memory was 163.1 MB in the beginning and 181.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.84 ms. Allocated memory is still 198.2 MB. Free memory was 181.4 MB in the beginning and 179.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 413.02 ms. Allocated memory is still 198.2 MB. Free memory was 179.8 MB in the beginning and 164.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 744.67 ms. Allocated memory is still 198.2 MB. Free memory was 164.0 MB in the beginning and 131.1 MB in the end (delta: 32.9 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_unsigned_int() [L29] B = __VERIFIER_nondet_unsigned_int() [L30] CALL assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L16] COND FALSE !(!cond) [L30] RET assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L31] CALL assume_abort_if_not(B >= 1) [L16] COND FALSE !(!cond) [L31] RET assume_abort_if_not(B >= 1) [L32] q = 0 [L33] r = A [L34] b = B [L35] COND TRUE 1 [L36] COND TRUE !(r >= b) [L39] COND TRUE 1 [L40] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 682.7ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 13.9ms, AutomataDifference: 182.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 20 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 66.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.0ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...