/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_1230.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:38:10,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:38:10,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:38:10,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 17:38:10,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 17:38:10,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 17:38:10,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 17:38:10,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 17:38:10,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 17:38:10,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 17:38:10,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 17:38:10,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 17:38:10,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:38:10,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:38:10,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:38:10,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:38:10,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:38:10,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:38:10,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:38:10,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:38:10,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:38:10,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:38:10,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:38:10,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:38:10,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:38:10,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:38:10,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:38:10,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:38:10,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:38:10,873 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:38:10,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:38:10,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:38:10,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:38:10,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:38:10,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:38:10,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:38:10,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:38:10,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:38:10,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:38:10,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:38:10,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:38:10,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:38:10,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:38:10,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:38:10,882 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:38:10,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:38:10,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:38:10,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:38:10,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:38:10,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:38:10,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:38:10,884 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:38:11,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:38:11,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:38:11,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:38:11,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:38:11,301 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:38:11,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1230.c [2021-02-23 17:38:11,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81658baae/a04706c82ac243faa794f06445f1b0ab/FLAG94fdfac17 [2021-02-23 17:38:12,106 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:38:12,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1230.c [2021-02-23 17:38:12,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81658baae/a04706c82ac243faa794f06445f1b0ab/FLAG94fdfac17 [2021-02-23 17:38:12,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81658baae/a04706c82ac243faa794f06445f1b0ab [2021-02-23 17:38:12,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:38:12,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:38:12,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:38:12,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:38:12,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:38:12,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aba67d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12, skipping insertion in model container [2021-02-23 17:38:12,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:38:12,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:38:12,730 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_1230.c[1411,1424] [2021-02-23 17:38:12,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:38:12,744 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:38:12,770 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_1230.c[1411,1424] [2021-02-23 17:38:12,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:38:12,790 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:38:12,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12 WrapperNode [2021-02-23 17:38:12,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:38:12,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:38:12,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:38:12,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:38:12,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:38:12,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:38:12,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:38:12,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:38:12,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:38:12,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:38:12,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:38:12,962 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:38:12,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-02-23 17:38:12,962 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2021-02-23 17:38:12,963 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-23 17:38:12,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:38:12,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:38:12,963 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:38:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:38:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:38:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-02-23 17:38:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 17:38:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:38:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:38:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2021-02-23 17:38:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-23 17:38:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:38:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:38:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:38:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:38:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:38:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 17:38:13,499 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:38:13,500 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-23 17:38:13,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:38:13 BoogieIcfgContainer [2021-02-23 17:38:13,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:38:13,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:38:13,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:38:13,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:38:13,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:38:12" (1/3) ... [2021-02-23 17:38:13,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebd037c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:38:13, skipping insertion in model container [2021-02-23 17:38:13,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12" (2/3) ... [2021-02-23 17:38:13,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebd037c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:38:13, skipping insertion in model container [2021-02-23 17:38:13,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:38:13" (3/3) ... [2021-02-23 17:38:13,512 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1230.c [2021-02-23 17:38:13,519 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:38:13,525 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:38:13,587 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:38:13,614 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:38:13,614 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:38:13,614 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:38:13,614 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:38:13,614 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:38:13,615 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:38:13,615 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:38:13,615 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:38:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-02-23 17:38:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 17:38:13,664 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:13,665 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] [2021-02-23 17:38:13,665 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:13,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1947623061, now seen corresponding path program 1 times [2021-02-23 17:38:13,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:13,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329409413] [2021-02-23 17:38:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:13,771 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:13,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:13,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:13,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:13,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:13,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:13,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:13,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:38:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:14,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:38:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:14,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-23 17:38:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:14,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:38:14,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329409413] [2021-02-23 17:38:14,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:14,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:38:14,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015855187] [2021-02-23 17:38:14,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:38:14,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:14,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:38:14,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:38:14,106 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 4 states. [2021-02-23 17:38:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:14,564 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2021-02-23 17:38:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:38:14,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2021-02-23 17:38:14,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:14,592 INFO L225 Difference]: With dead ends: 133 [2021-02-23 17:38:14,593 INFO L226 Difference]: Without dead ends: 69 [2021-02-23 17:38:14,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 17:38:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-23 17:38:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-02-23 17:38:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-02-23 17:38:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2021-02-23 17:38:14,698 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 42 [2021-02-23 17:38:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:14,699 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2021-02-23 17:38:14,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:38:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2021-02-23 17:38:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-23 17:38:14,706 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:14,707 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] [2021-02-23 17:38:14,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:38:14,708 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:14,709 INFO L82 PathProgramCache]: Analyzing trace with hash -520908132, now seen corresponding path program 1 times [2021-02-23 17:38:14,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:14,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567925437] [2021-02-23 17:38:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:14,718 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:14,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:14,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:38:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:15,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:38:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:15,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-02-23 17:38:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:38:15,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567925437] [2021-02-23 17:38:15,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:15,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:38:15,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293206583] [2021-02-23 17:38:15,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:38:15,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:38:15,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:38:15,118 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 6 states. [2021-02-23 17:38:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:15,533 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-02-23 17:38:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:38:15,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2021-02-23 17:38:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:15,538 INFO L225 Difference]: With dead ends: 90 [2021-02-23 17:38:15,539 INFO L226 Difference]: Without dead ends: 74 [2021-02-23 17:38:15,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:38:15,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-23 17:38:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-02-23 17:38:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-23 17:38:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-02-23 17:38:15,560 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 49 [2021-02-23 17:38:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:15,561 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-02-23 17:38:15,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:38:15,561 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-02-23 17:38:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-23 17:38:15,563 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:15,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:38:15,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:38:15,564 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:15,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1499881465, now seen corresponding path program 1 times [2021-02-23 17:38:15,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:15,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177613322] [2021-02-23 17:38:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:15,568 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:38:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 17:38:15,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:38:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:15,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-23 17:38:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:38:15,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177613322] [2021-02-23 17:38:15,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:15,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:38:15,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792954318] [2021-02-23 17:38:15,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:38:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:15,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:38:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:38:15,792 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 6 states. [2021-02-23 17:38:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:16,119 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2021-02-23 17:38:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:38:16,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2021-02-23 17:38:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:16,122 INFO L225 Difference]: With dead ends: 94 [2021-02-23 17:38:16,122 INFO L226 Difference]: Without dead ends: 78 [2021-02-23 17:38:16,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:38:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-23 17:38:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2021-02-23 17:38:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-23 17:38:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-02-23 17:38:16,137 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 52 [2021-02-23 17:38:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:16,138 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-02-23 17:38:16,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:38:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-02-23 17:38:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-23 17:38:16,140 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:16,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:38:16,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:38:16,141 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:16,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1894828089, now seen corresponding path program 1 times [2021-02-23 17:38:16,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:16,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141198097] [2021-02-23 17:38:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:16,144 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:38:16,172 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:38:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:38:16,194 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:38:16,226 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:38:16,227 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:38:16,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:38:16,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:38:16 BoogieIcfgContainer [2021-02-23 17:38:16,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:38:16,252 INFO L168 Benchmark]: Toolchain (without parser) took 3797.78 ms. Allocated memory was 155.2 MB in the beginning and 199.2 MB in the end (delta: 44.0 MB). Free memory was 132.4 MB in the beginning and 92.8 MB in the end (delta: 39.6 MB). Peak memory consumption was 84.2 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:16,252 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 155.2 MB. Free memory is still 129.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:38:16,253 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.15 ms. Allocated memory is still 155.2 MB. Free memory was 131.3 MB in the beginning and 121.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:16,254 INFO L168 Benchmark]: Boogie Preprocessor took 53.61 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:16,255 INFO L168 Benchmark]: RCFGBuilder took 653.17 ms. Allocated memory is still 155.2 MB. Free memory was 119.5 MB in the beginning and 99.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:16,256 INFO L168 Benchmark]: TraceAbstraction took 2745.45 ms. Allocated memory was 155.2 MB in the beginning and 199.2 MB in the end (delta: 44.0 MB). Free memory was 98.7 MB in the beginning and 92.8 MB in the end (delta: 5.9 MB). Peak memory consumption was 50.6 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:16,259 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 155.2 MB. Free memory is still 129.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 321.15 ms. Allocated memory is still 155.2 MB. Free memory was 131.3 MB in the beginning and 121.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.61 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 653.17 ms. Allocated memory is still 155.2 MB. Free memory was 119.5 MB in the beginning and 99.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2745.45 ms. Allocated memory was 155.2 MB in the beginning and 199.2 MB in the end (delta: 44.0 MB). Free memory was 98.7 MB in the beginning and 92.8 MB in the end (delta: 5.9 MB). Peak memory consumption was 50.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 61]: 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 46, overapproximation of someBinaryArithmeticFLOAToperation at line 57. Possible FailurePath: [L56] float x = 0.0f / 0.0f; [L57] float y = 0.0f / 0.0f; [L58] CALL, EXPR fmin_float(x, y) [L37] CALL, EXPR __fpclassify_float(x) [L14] __uint32_t w; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L22] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L24-L25] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L27-L28] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L30] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L33] return 0; [L37] RET, EXPR __fpclassify_float(x) [L37] COND TRUE __fpclassify_float(x) == 0 [L38] return y; [L58] RET, EXPR fmin_float(x, y) [L58] float res = fmin_float(x, y); [L60] CALL, EXPR isnan_float(res) [L46] return x != x; [L60] RET, EXPR isnan_float(res) [L60] COND TRUE !isnan_float(res) [L61] 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: 1.2s, 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, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s 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: 0.0s 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...