/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1250.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 03:56:18,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 03:56:18,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 03:56:18,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 03:56:18,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 03:56:18,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 03:56:18,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 03:56:18,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 03:56:18,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 03:56:18,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 03:56:18,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 03:56:18,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 03:56:18,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 03:56:18,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 03:56:18,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 03:56:18,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 03:56:18,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 03:56:18,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 03:56:18,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 03:56:18,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 03:56:18,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 03:56:18,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 03:56:18,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 03:56:18,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 03:56:18,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-24 03:56:18,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-24 03:56:18,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-24 03:56:18,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-24 03:56:18,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-24 03:56:18,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-24 03:56:18,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-24 03:56:18,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-24 03:56:18,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-24 03:56:18,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-24 03:56:18,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-24 03:56:18,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-24 03:56:18,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-24 03:56:18,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-24 03:56:18,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 03:56:18,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 03:56:18,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 03:56:18,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 03:56:18,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 03:56:18,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 03:56:18,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 03:56:18,538 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 03:56:18,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 03:56:18,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 03:56:18,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 03:56:18,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 03:56:18,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 03:56:18,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 03:56:18,540 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 03:56:18,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 03:56:18,540 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 03:56:18,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 03:56:18,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 03:56:18,541 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 03:56:18,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 03:56:18,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 03:56:18,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 03:56:18,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 03:56:18,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 03:56:18,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 03:56:18,543 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 03:56:18,543 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 03:56:18,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 03:56:18,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 03:56:18,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 03:56:18,945 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 03:56:18,945 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 03:56:18,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1250.c [2021-02-24 03:56:19,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8583eeb9a/144ba6a1bf2e482db5b71fb261e9e2b0/FLAG6ff04ca5e [2021-02-24 03:56:19,758 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 03:56:19,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1250.c [2021-02-24 03:56:19,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8583eeb9a/144ba6a1bf2e482db5b71fb261e9e2b0/FLAG6ff04ca5e [2021-02-24 03:56:20,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8583eeb9a/144ba6a1bf2e482db5b71fb261e9e2b0 [2021-02-24 03:56:20,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 03:56:20,115 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 03:56:20,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 03:56:20,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 03:56:20,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 03:56:20,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:56:20" (1/1) ... [2021-02-24 03:56:20,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590a261e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20, skipping insertion in model container [2021-02-24 03:56:20,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:56:20" (1/1) ... [2021-02-24 03:56:20,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 03:56:20,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 03:56:20,328 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_1250.c[1719,1732] [2021-02-24 03:56:20,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:56:20,346 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 03:56:20,372 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_1250.c[1719,1732] [2021-02-24 03:56:20,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:56:20,393 INFO L208 MainTranslator]: Completed translation [2021-02-24 03:56:20,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20 WrapperNode [2021-02-24 03:56:20,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 03:56:20,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 03:56:20,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 03:56:20,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 03:56:20,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20" (1/1) ... [2021-02-24 03:56:20,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20" (1/1) ... [2021-02-24 03:56:20,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20" (1/1) ... [2021-02-24 03:56:20,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20" (1/1) ... [2021-02-24 03:56:20,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20" (1/1) ... [2021-02-24 03:56:20,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20" (1/1) ... [2021-02-24 03:56:20,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20" (1/1) ... [2021-02-24 03:56:20,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 03:56:20,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 03:56:20,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 03:56:20,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 03:56:20,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20" (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 [2021-02-24 03:56:20,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 03:56:20,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 03:56:20,567 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 03:56:20,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-02-24 03:56:20,567 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2021-02-24 03:56:20,567 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-24 03:56:20,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 03:56:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 03:56:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 03:56:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 03:56:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 03:56:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-02-24 03:56:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-24 03:56:20,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 03:56:20,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 03:56:20,571 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2021-02-24 03:56:20,571 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-24 03:56:20,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 03:56:20,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 03:56:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 03:56:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 03:56:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 03:56:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-24 03:56:21,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 03:56:21,157 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-24 03:56:21,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:56:21 BoogieIcfgContainer [2021-02-24 03:56:21,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 03:56:21,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 03:56:21,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 03:56:21,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 03:56:21,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:56:20" (1/3) ... [2021-02-24 03:56:21,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6aa625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:56:21, skipping insertion in model container [2021-02-24 03:56:21,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:20" (2/3) ... [2021-02-24 03:56:21,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6aa625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:56:21, skipping insertion in model container [2021-02-24 03:56:21,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:56:21" (3/3) ... [2021-02-24 03:56:21,169 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2021-02-24 03:56:21,177 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 03:56:21,184 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 03:56:21,207 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 03:56:21,234 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 03:56:21,235 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 03:56:21,235 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 03:56:21,235 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 03:56:21,235 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 03:56:21,235 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 03:56:21,236 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 03:56:21,236 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 03:56:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-02-24 03:56:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 03:56:21,265 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:56:21,266 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] [2021-02-24 03:56:21,267 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:56:21,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:56:21,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1519361119, now seen corresponding path program 1 times [2021-02-24 03:56:21,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:56:21,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171104329] [2021-02-24 03:56:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:56:21,382 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:56:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:21,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:21,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:21,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:21,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:21,744 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-24 03:56:21,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 03:56:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:21,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:21,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:21,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 03:56:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:21,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:21,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:21,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:21,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:21,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 03:56:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:21,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:21,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:21,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:21,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:21,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-24 03:56:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:22,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:22,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 03:56:22,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171104329] [2021-02-24 03:56:22,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 03:56:22,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 03:56:22,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97469184] [2021-02-24 03:56:22,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 03:56:22,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 03:56:22,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 03:56:22,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 03:56:22,060 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 4 states. [2021-02-24 03:56:22,209 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-24 03:56:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 03:56:22,500 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2021-02-24 03:56:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 03:56:22,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2021-02-24 03:56:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 03:56:22,516 INFO L225 Difference]: With dead ends: 133 [2021-02-24 03:56:22,517 INFO L226 Difference]: Without dead ends: 69 [2021-02-24 03:56:22,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 03:56:22,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-24 03:56:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-02-24 03:56:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-02-24 03:56:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2021-02-24 03:56:22,612 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 42 [2021-02-24 03:56:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 03:56:22,613 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2021-02-24 03:56:22,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 03:56:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2021-02-24 03:56:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-24 03:56:22,617 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:56:22,617 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] [2021-02-24 03:56:22,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 03:56:22,618 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:56:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:56:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash 731683279, now seen corresponding path program 1 times [2021-02-24 03:56:22,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:56:22,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672809675] [2021-02-24 03:56:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:56:22,623 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:56:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:22,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:22,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:22,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:22,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:22,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 03:56:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:22,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:22,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:22,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 03:56:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:22,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:22,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:22,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:22,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 03:56:22,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:22,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:22,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 03:56:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:22,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:22,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:22,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:22,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 03:56:22,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-02-24 03:56:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:22,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:22,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 03:56:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672809675] [2021-02-24 03:56:22,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 03:56:22,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 03:56:22,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059285492] [2021-02-24 03:56:22,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 03:56:22,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 03:56:22,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 03:56:22,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 03:56:22,849 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 6 states. [2021-02-24 03:56:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 03:56:23,228 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-02-24 03:56:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 03:56:23,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2021-02-24 03:56:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 03:56:23,233 INFO L225 Difference]: With dead ends: 90 [2021-02-24 03:56:23,233 INFO L226 Difference]: Without dead ends: 74 [2021-02-24 03:56:23,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-24 03:56:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-24 03:56:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-02-24 03:56:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-24 03:56:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-02-24 03:56:23,265 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 49 [2021-02-24 03:56:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 03:56:23,266 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-02-24 03:56:23,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 03:56:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-02-24 03:56:23,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-24 03:56:23,272 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:56:23,272 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] [2021-02-24 03:56:23,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 03:56:23,273 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:56:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:56:23,278 INFO L82 PathProgramCache]: Analyzing trace with hash 217536091, now seen corresponding path program 1 times [2021-02-24 03:56:23,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:56:23,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725333464] [2021-02-24 03:56:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:56:23,284 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:56:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:23,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:23,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:23,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:23,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:23,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 03:56:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:23,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:23,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:23,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 03:56:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:23,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:23,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:23,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:23,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 03:56:23,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:23,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:23,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 03:56:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:23,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:23,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:23,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:23,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 03:56:23,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-24 03:56:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:23,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:23,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 03:56:23,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725333464] [2021-02-24 03:56:23,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 03:56:23,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 03:56:23,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633800399] [2021-02-24 03:56:23,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 03:56:23,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 03:56:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 03:56:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 03:56:23,520 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 6 states. [2021-02-24 03:56:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 03:56:23,801 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2021-02-24 03:56:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 03:56:23,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2021-02-24 03:56:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 03:56:23,804 INFO L225 Difference]: With dead ends: 94 [2021-02-24 03:56:23,804 INFO L226 Difference]: Without dead ends: 78 [2021-02-24 03:56:23,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-24 03:56:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-24 03:56:23,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2021-02-24 03:56:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-24 03:56:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-02-24 03:56:23,823 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 52 [2021-02-24 03:56:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 03:56:23,824 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-02-24 03:56:23,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 03:56:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-02-24 03:56:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-24 03:56:23,826 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:56:23,826 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] [2021-02-24 03:56:23,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 03:56:23,827 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:56:23,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:56:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash -177410533, now seen corresponding path program 1 times [2021-02-24 03:56:23,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:56:23,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717552608] [2021-02-24 03:56:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:56:23,830 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:56:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:56:23,858 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:56:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:56:23,879 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:56:23,918 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 03:56:23,918 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 03:56:23,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 03:56:23,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 03:56:23 BoogieIcfgContainer [2021-02-24 03:56:23,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 03:56:23,941 INFO L168 Benchmark]: Toolchain (without parser) took 3837.17 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 57.2 MB in the end (delta: 70.6 MB). Peak memory consumption was 70.7 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:23,942 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 03:56:23,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.24 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:23,943 INFO L168 Benchmark]: Boogie Preprocessor took 48.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:23,944 INFO L168 Benchmark]: RCFGBuilder took 714.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 94.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:23,945 INFO L168 Benchmark]: TraceAbstraction took 2777.78 ms. Allocated memory is still 151.0 MB. Free memory was 93.9 MB in the beginning and 57.2 MB in the end (delta: 36.7 MB). Peak memory consumption was 37.2 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:23,948 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 277.24 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 714.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 94.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2777.78 ms. Allocated memory is still 151.0 MB. Free memory was 93.9 MB in the beginning and 57.2 MB in the end (delta: 36.7 MB). Peak memory consumption was 37.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 67]: 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 56, overapproximation of someBinaryArithmeticFLOAToperation at line 63. Possible FailurePath: [L62] float x = 0.0f / 0.0f; [L63] float y = 0.0f / 0.0f; [L64] CALL, EXPR fmax_float(x, y) [L45] CALL, EXPR __fpclassify_float(x) [L22] __uint32_t w; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] RET, EXPR __fpclassify_float(x) [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; [L64] RET, EXPR fmax_float(x, y) [L64] float res = fmax_float(x, y); [L66] CALL, EXPR isnan_float(res) [L56] return x != x; [L66] RET, EXPR isnan_float(res) [L66] COND TRUE !isnan_float(res) [L67] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 230 SDtfs, 59 SDslu, 396 SDs, 0 SdLazy, 309 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred 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: 0.1s 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...