/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032c.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:37:49,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:37:49,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:37:49,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:37:49,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:37:49,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:37:49,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:37:49,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:37:49,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:37:49,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:37:49,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:37:49,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:37:49,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:37:49,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:37:49,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:37:49,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:37:49,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:37:49,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:37:49,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:37:49,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:37:49,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:37:49,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:37:49,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:37:49,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:37:49,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:37:49,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:37:49,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:37:49,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:37:49,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:37:49,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:37:49,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:37:49,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:37:49,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:37:49,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:37:49,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:37:49,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:37:49,355 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:37:49,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:37:49,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:37:49,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:37:49,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:37:49,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:37:49,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:37:49,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:37:49,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:37:49,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:37:49,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:37:49,857 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:37:49,858 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:37:49,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032c.c [2021-02-23 17:37:49,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/665513b49/4bfd5b64c6f44525bd824947d88205f4/FLAG961b94685 [2021-02-23 17:37:50,653 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:37:50,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1032c.c [2021-02-23 17:37:50,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/665513b49/4bfd5b64c6f44525bd824947d88205f4/FLAG961b94685 [2021-02-23 17:37:51,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/665513b49/4bfd5b64c6f44525bd824947d88205f4 [2021-02-23 17:37:51,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:37:51,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:37:51,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:37:51,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:37:51,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:37:51,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:37:51" (1/1) ... [2021-02-23 17:37:51,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ea1b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51, skipping insertion in model container [2021-02-23 17:37:51,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:37:51" (1/1) ... [2021-02-23 17:37:51,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:37:51,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:37:51,238 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1032c.c[1743,1756] [2021-02-23 17:37:51,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:37:51,251 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:37:51,277 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1032c.c[1743,1756] [2021-02-23 17:37:51,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:37:51,294 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:37:51,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51 WrapperNode [2021-02-23 17:37:51,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:37:51,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:37:51,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:37:51,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:37:51,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51" (1/1) ... [2021-02-23 17:37:51,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51" (1/1) ... [2021-02-23 17:37:51,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51" (1/1) ... [2021-02-23 17:37:51,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51" (1/1) ... [2021-02-23 17:37:51,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51" (1/1) ... [2021-02-23 17:37:51,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51" (1/1) ... [2021-02-23 17:37:51,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51" (1/1) ... [2021-02-23 17:37:51,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:37:51,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:37:51,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:37:51,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:37:51,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51" (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 [2021-02-23 17:37:51,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:37:51,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:37:51,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:37:51,462 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2021-02-23 17:37:51,462 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2021-02-23 17:37:51,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:37:51,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:37:51,462 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:37:51,463 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:37:51,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:37:51,464 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2021-02-23 17:37:51,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 17:37:51,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:37:51,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:37:51,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:37:51,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 17:37:51,466 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2021-02-23 17:37:51,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:37:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:37:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:37:51,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:37:51,955 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:37:51,955 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 17:37:51,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:37:51 BoogieIcfgContainer [2021-02-23 17:37:51,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:37:51,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:37:51,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:37:51,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:37:51,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:37:51" (1/3) ... [2021-02-23 17:37:51,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6235ebb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:37:51, skipping insertion in model container [2021-02-23 17:37:51,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:51" (2/3) ... [2021-02-23 17:37:51,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6235ebb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:37:51, skipping insertion in model container [2021-02-23 17:37:51,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:37:51" (3/3) ... [2021-02-23 17:37:51,985 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032c.c [2021-02-23 17:37:52,007 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:37:52,024 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:37:52,065 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:37:52,092 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:37:52,093 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:37:52,093 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:37:52,093 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:37:52,093 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:37:52,093 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:37:52,094 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:37:52,094 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:37:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2021-02-23 17:37:52,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-23 17:37:52,126 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:37:52,127 INFO L422 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] [2021-02-23 17:37:52,127 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:37:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:37:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1229976833, now seen corresponding path program 1 times [2021-02-23 17:37:52,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:37:52,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355243940] [2021-02-23 17:37:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:37:52,254 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:37:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:37:52,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:52,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:52,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:52,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:52,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:37:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:37:52,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:52,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:52,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:37:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:37:52,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:52,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:52,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:52,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:52,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-23 17:37:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:37:52,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:52,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:52,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:52,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:37:52,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355243940] [2021-02-23 17:37:52,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:37:52,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:37:52,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552673623] [2021-02-23 17:37:52,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:37:52,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:37:52,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:37:52,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:37:52,638 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 4 states. [2021-02-23 17:37:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:37:52,919 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2021-02-23 17:37:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:37:52,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2021-02-23 17:37:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:37:52,931 INFO L225 Difference]: With dead ends: 140 [2021-02-23 17:37:52,932 INFO L226 Difference]: Without dead ends: 72 [2021-02-23 17:37:52,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 17:37:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-23 17:37:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-02-23 17:37:52,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-02-23 17:37:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-02-23 17:37:52,991 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 38 [2021-02-23 17:37:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:37:52,991 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-02-23 17:37:52,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:37:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-02-23 17:37:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-23 17:37:52,994 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:37:52,994 INFO L422 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] [2021-02-23 17:37:52,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:37:52,995 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:37:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:37:52,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1639604118, now seen corresponding path program 1 times [2021-02-23 17:37:52,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:37:52,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056106757] [2021-02-23 17:37:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:37:53,000 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:37:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:37:53,088 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:37:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:37:53,209 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:37:53,271 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:37:53,272 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:37:53,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:37:53,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:37:53 BoogieIcfgContainer [2021-02-23 17:37:53,307 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:37:53,309 INFO L168 Benchmark]: Toolchain (without parser) took 2283.81 ms. Allocated memory was 179.3 MB in the beginning and 252.7 MB in the end (delta: 73.4 MB). Free memory was 155.3 MB in the beginning and 235.3 MB in the end (delta: -80.0 MB). Peak memory consumption was 65.6 MB. Max. memory is 8.0 GB. [2021-02-23 17:37:53,311 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 179.3 MB. Free memory was 157.1 MB in the beginning and 157.0 MB in the end (delta: 105.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:37:53,312 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.70 ms. Allocated memory is still 179.3 MB. Free memory was 154.1 MB in the beginning and 143.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 17:37:53,312 INFO L168 Benchmark]: Boogie Preprocessor took 58.16 ms. Allocated memory is still 179.3 MB. Free memory was 143.9 MB in the beginning and 142.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:37:53,313 INFO L168 Benchmark]: RCFGBuilder took 607.91 ms. Allocated memory is still 179.3 MB. Free memory was 142.1 MB in the beginning and 157.7 MB in the end (delta: -15.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:37:53,314 INFO L168 Benchmark]: TraceAbstraction took 1339.08 ms. Allocated memory was 179.3 MB in the beginning and 252.7 MB in the end (delta: 73.4 MB). Free memory was 157.7 MB in the beginning and 235.3 MB in the end (delta: -77.6 MB). Peak memory consumption was 68.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:37:53,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 179.3 MB. Free memory was 157.1 MB in the beginning and 157.0 MB in the end (delta: 105.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.70 ms. Allocated memory is still 179.3 MB. Free memory was 154.1 MB in the beginning and 143.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.16 ms. Allocated memory is still 179.3 MB. Free memory was 143.9 MB in the beginning and 142.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 607.91 ms. Allocated memory is still 179.3 MB. Free memory was 142.1 MB in the beginning and 157.7 MB in the end (delta: -15.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1339.08 ms. Allocated memory was 179.3 MB in the beginning and 252.7 MB in the end (delta: 73.4 MB). Free memory was 157.7 MB in the beginning and 235.3 MB in the end (delta: -77.6 MB). Peak memory consumption was 68.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 81]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticFLOAToperation at line 44, overapproximation of bitwiseAnd at line 64. Possible FailurePath: [L76] float x = 1.0f / 0.0f; [L77] CALL, EXPR round_float(x) [L14] __uint32_t w; [L16] int exponent_less_127; [L19] ieee_float_shape_type gf_u; [L20] gf_u.value = (x) [L21] EXPR gf_u.word [L21] (w) = gf_u.word [L24] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L26] COND FALSE !(exponent_less_127 < 23) [L42] COND TRUE exponent_less_127 == 128 [L44] return x + x; [L77] RET, EXPR round_float(x) [L77] float res = round_float(x); [L80] CALL, EXPR isinf_float(res) [L58] __int32_t ix; [L60] ieee_float_shape_type gf_u; [L61] gf_u.value = (x) [L62] EXPR gf_u.word [L62] (ix) = gf_u.word [L64] ix &= 0x7fffffff [L65] return ((ix) == 0x7f800000L); [L80] RET, EXPR isinf_float(res) [L80] COND TRUE !isinf_float(res) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 82 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 79 SDtfs, 13 SDslu, 56 SDs, 0 SdLazy, 90 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s 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...