/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_1252b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:10:57,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:10:57,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:10:57,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:10:57,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:10:57,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:10:57,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:10:57,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:10:57,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:10:57,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:10:57,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:10:57,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:10:57,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:10:57,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:10:57,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:10:57,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:10:57,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:10:57,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:10:57,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:10:57,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:10:57,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:10:57,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:10:57,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:10:57,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:10:57,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:10:57,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:10:57,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:10:57,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:10:57,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:10:57,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:10:57,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:10:57,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:10:57,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:10:57,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:10:57,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:10:57,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:10:57,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:10:57,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:10:57,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:10:57,258 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:10:57,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:10:57,259 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:10:57,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:10:57,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:10:57,260 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:10:57,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:10:57,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:10:57,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:10:57,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:10:57,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:10:57,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:10:57,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:10:57,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:10:57,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:10:57,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:10:57,649 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:10:57,650 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:10:57,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2021-02-21 20:10:57,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0971936a/8824fad34a7b41e0b10164fd944a35a1/FLAG41195d54d [2021-02-21 20:10:58,355 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:10:58,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2021-02-21 20:10:58,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0971936a/8824fad34a7b41e0b10164fd944a35a1/FLAG41195d54d [2021-02-21 20:10:58,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0971936a/8824fad34a7b41e0b10164fd944a35a1 [2021-02-21 20:10:58,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:10:58,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:10:58,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:10:58,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:10:58,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:10:58,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:10:58" (1/1) ... [2021-02-21 20:10:58,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb85d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:58, skipping insertion in model container [2021-02-21 20:10:58,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:10:58" (1/1) ... [2021-02-21 20:10:58,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:10:58,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:10:59,017 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_1252b.c[1936,1949] [2021-02-21 20:10:59,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:10:59,031 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:10:59,058 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_1252b.c[1936,1949] [2021-02-21 20:10:59,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:10:59,077 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:10:59,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:59 WrapperNode [2021-02-21 20:10:59,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:10:59,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:10:59,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:10:59,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:10:59,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:59" (1/1) ... [2021-02-21 20:10:59,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:59" (1/1) ... [2021-02-21 20:10:59,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:59" (1/1) ... [2021-02-21 20:10:59,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:59" (1/1) ... [2021-02-21 20:10:59,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:59" (1/1) ... [2021-02-21 20:10:59,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:59" (1/1) ... [2021-02-21 20:10:59,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:59" (1/1) ... [2021-02-21 20:10:59,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:10:59,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:10:59,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:10:59,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:10:59,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:59" (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 [2021-02-21 20:10:59,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:10:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:10:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:10:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-02-21 20:10:59,238 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2021-02-21 20:10:59,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-21 20:10:59,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:10:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:10:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:10:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:10:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:10:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-21 20:10:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-02-21 20:10:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-21 20:10:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:10:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:10:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2021-02-21 20:10:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-21 20:10:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:10:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:10:59,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:10:59,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:10:59,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:10:59,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-21 20:10:59,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:10:59,792 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-21 20:10:59,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:10:59 BoogieIcfgContainer [2021-02-21 20:10:59,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:10:59,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:10:59,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:10:59,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:10:59,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:10:58" (1/3) ... [2021-02-21 20:10:59,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53da6153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:10:59, skipping insertion in model container [2021-02-21 20:10:59,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:59" (2/3) ... [2021-02-21 20:10:59,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53da6153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:10:59, skipping insertion in model container [2021-02-21 20:10:59,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:10:59" (3/3) ... [2021-02-21 20:10:59,804 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-02-21 20:10:59,811 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:10:59,816 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:10:59,836 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:10:59,859 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:10:59,859 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:10:59,860 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:10:59,860 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:10:59,860 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:10:59,860 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:10:59,860 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:10:59,860 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:10:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2021-02-21 20:10:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 20:10:59,889 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:59,890 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] [2021-02-21 20:10:59,891 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash 56598068, now seen corresponding path program 1 times [2021-02-21 20:10:59,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:59,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378127148] [2021-02-21 20:10:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:59,989 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:00,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:00,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:11:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:00,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:11:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:00,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:11:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378127148] [2021-02-21 20:11:00,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:00,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:11:00,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894975568] [2021-02-21 20:11:00,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:11:00,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:00,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:11:00,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:11:00,442 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 4 states. [2021-02-21 20:11:00,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:00,971 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2021-02-21 20:11:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:11:00,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2021-02-21 20:11:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:00,985 INFO L225 Difference]: With dead ends: 161 [2021-02-21 20:11:00,986 INFO L226 Difference]: Without dead ends: 82 [2021-02-21 20:11:00,990 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 [2021-02-21 20:11:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-21 20:11:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-02-21 20:11:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-21 20:11:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2021-02-21 20:11:01,050 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 39 [2021-02-21 20:11:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:01,051 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2021-02-21 20:11:01,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:11:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2021-02-21 20:11:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-21 20:11:01,054 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:01,054 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] [2021-02-21 20:11:01,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:11:01,055 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:01,056 INFO L82 PathProgramCache]: Analyzing trace with hash -127481842, now seen corresponding path program 1 times [2021-02-21 20:11:01,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:01,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960688940] [2021-02-21 20:11:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:01,060 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:01,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:01,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:01,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:01,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:01,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:11:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:01,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:01,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:01,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:01,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:11:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:01,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:01,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:11:01,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960688940] [2021-02-21 20:11:01,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:01,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:11:01,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820523599] [2021-02-21 20:11:01,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:11:01,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:01,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:11:01,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:11:01,407 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 6 states. [2021-02-21 20:11:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:01,851 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-02-21 20:11:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:11:01,852 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-02-21 20:11:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:01,862 INFO L225 Difference]: With dead ends: 116 [2021-02-21 20:11:01,862 INFO L226 Difference]: Without dead ends: 87 [2021-02-21 20:11:01,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:11:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-21 20:11:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-02-21 20:11:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-21 20:11:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-02-21 20:11:01,901 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 46 [2021-02-21 20:11:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:01,902 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-02-21 20:11:01,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:11:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-02-21 20:11:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 20:11:01,904 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:01,904 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] [2021-02-21 20:11:01,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:11:01,905 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:01,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1581675528, now seen corresponding path program 1 times [2021-02-21 20:11:01,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:01,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823789220] [2021-02-21 20:11:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:01,909 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:01,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:01,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:01,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:01,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:01,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:02,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:11:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:02,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:02,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:02,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:02,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:02,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:02,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:02,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:11:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:02,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:02,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:02,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:02,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:11:02,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823789220] [2021-02-21 20:11:02,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:02,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:11:02,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865581944] [2021-02-21 20:11:02,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:11:02,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:02,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:11:02,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:11:02,104 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 6 states. [2021-02-21 20:11:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:02,384 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2021-02-21 20:11:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:11:02,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2021-02-21 20:11:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:02,387 INFO L225 Difference]: With dead ends: 120 [2021-02-21 20:11:02,387 INFO L226 Difference]: Without dead ends: 91 [2021-02-21 20:11:02,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:11:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-21 20:11:02,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-02-21 20:11:02,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-21 20:11:02,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-02-21 20:11:02,400 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 49 [2021-02-21 20:11:02,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:02,401 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-02-21 20:11:02,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:11:02,401 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-02-21 20:11:02,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 20:11:02,403 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:02,403 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] [2021-02-21 20:11:02,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:11:02,403 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:02,404 INFO L82 PathProgramCache]: Analyzing trace with hash -869200840, now seen corresponding path program 1 times [2021-02-21 20:11:02,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:02,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870109438] [2021-02-21 20:11:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:02,406 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:11:02,427 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:11:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:11:02,445 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:11:02,476 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:11:02,476 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:11:02,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:11:02,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:11:02 BoogieIcfgContainer [2021-02-21 20:11:02,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:11:02,497 INFO L168 Benchmark]: Toolchain (without parser) took 3745.84 ms. Allocated memory was 175.1 MB in the beginning and 215.0 MB in the end (delta: 39.8 MB). Free memory was 151.0 MB in the beginning and 143.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 48.7 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:02,497 INFO L168 Benchmark]: CDTParser took 0.99 ms. Allocated memory is still 175.1 MB. Free memory is still 155.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:11:02,498 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.02 ms. Allocated memory is still 175.1 MB. Free memory was 150.0 MB in the beginning and 139.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:02,499 INFO L168 Benchmark]: Boogie Preprocessor took 44.23 ms. Allocated memory is still 175.1 MB. Free memory was 139.6 MB in the beginning and 137.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:02,499 INFO L168 Benchmark]: RCFGBuilder took 670.59 ms. Allocated memory is still 175.1 MB. Free memory was 137.8 MB in the beginning and 151.3 MB in the end (delta: -13.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:02,500 INFO L168 Benchmark]: TraceAbstraction took 2698.75 ms. Allocated memory was 175.1 MB in the beginning and 215.0 MB in the end (delta: 39.8 MB). Free memory was 150.8 MB in the beginning and 143.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 47.6 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:02,503 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.99 ms. Allocated memory is still 175.1 MB. Free memory is still 155.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 307.02 ms. Allocated memory is still 175.1 MB. Free memory was 150.0 MB in the beginning and 139.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.23 ms. Allocated memory is still 175.1 MB. Free memory was 139.6 MB in the beginning and 137.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 670.59 ms. Allocated memory is still 175.1 MB. Free memory was 137.8 MB in the beginning and 151.3 MB in the end (delta: -13.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2698.75 ms. Allocated memory was 175.1 MB in the beginning and 215.0 MB in the end (delta: 39.8 MB). Free memory was 150.8 MB in the beginning and 143.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 47.6 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 someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L77] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] RET, EXPR __fpclassify_float(x) [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L77] RET, EXPR fmax_float(x, y) [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 93 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 270 SDtfs, 53 SDslu, 492 SDs, 0 SdLazy, 364 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred 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, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 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...