/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_1232a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:38:10,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:38:10,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:38:10,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 17:38:10,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 17:38:10,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 17:38:10,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 17:38:10,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 17:38:10,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 17:38:10,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 17:38:10,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 17:38:10,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 17:38:10,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:38:10,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:38:10,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:38:10,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:38:10,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:38:10,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:38:10,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:38:10,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:38:10,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:38:10,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:38:10,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:38:10,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:38:10,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:38:10,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:38:10,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:38:10,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:38:10,798 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 17:38:10,810 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:38:10,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:38:10,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:38:10,812 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:38:10,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:38:10,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:38:10,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:38:10,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:38:10,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:38:10,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:38:10,813 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:38:10,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:38:10,814 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:38:10,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:38:10,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:38:10,814 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:38:10,815 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:38:10,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:38:10,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:38:10,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:38:10,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:38:10,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:38:10,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:38:11,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:38:11,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:38:11,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:38:11,233 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:38:11,234 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:38:11,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232a.c [2021-02-23 17:38:11,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad55fca4/f3eef85ae5914af5b494e773cf8aef3e/FLAGcd73ae765 [2021-02-23 17:38:11,938 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:38:11,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1232a.c [2021-02-23 17:38:11,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad55fca4/f3eef85ae5914af5b494e773cf8aef3e/FLAGcd73ae765 [2021-02-23 17:38:12,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad55fca4/f3eef85ae5914af5b494e773cf8aef3e [2021-02-23 17:38:12,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:38:12,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:38:12,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:38:12,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:38:12,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:38:12,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586de8cc 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 17:38:12,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:38:12" (1/1) ... [2021-02-23 17:38:12,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:38:12,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:38:12,506 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_1232a.c[1656,1669] [2021-02-23 17:38:12,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:38:12,519 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:38:12,546 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_1232a.c[1656,1669] [2021-02-23 17:38:12,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:38:12,565 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:38:12,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:12 WrapperNode [2021-02-23 17:38:12,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:38:12,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:38:12,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:38:12,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:38:12,582 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 17:38:12,582 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 17:38:12,591 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 17:38:12,592 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 17:38:12,601 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 17:38:12,608 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 17:38:12,611 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 17:38:12,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:38:12,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:38:12,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:38:12,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:38:12,618 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 17:38:12,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:38:12,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:38:12,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:38:12,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-02-23 17:38:12,736 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2021-02-23 17:38:12,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-23 17:38:12,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:38:12,737 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:38:12,737 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:38:12,738 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:38:12,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:38:12,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-23 17:38:12,739 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-02-23 17:38:12,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 17:38:12,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:38:12,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:38:12,741 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2021-02-23 17:38:12,741 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-23 17:38:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:38:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:38:12,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:38:12,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:38:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 17:38:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:38:13,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:38:13,456 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-23 17:38:13,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:38:13 BoogieIcfgContainer [2021-02-23 17:38:13,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:38:13,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:38:13,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:38:13,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:38:13,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:38:12" (1/3) ... [2021-02-23 17:38:13,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f07dff6 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 17:38:13,470 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 17:38:13,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f07dff6 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 17:38:13,471 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 17:38:13,473 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2021-02-23 17:38:13,480 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:38:13,486 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:38:13,506 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:38:13,543 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:38:13,544 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:38:13,544 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:38:13,545 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:38:13,545 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:38:13,545 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:38:13,545 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:38:13,545 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:38:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2021-02-23 17:38:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-23 17:38:13,582 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:13,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:38:13,583 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:13,591 INFO L82 PathProgramCache]: Analyzing trace with hash 515290282, now seen corresponding path program 1 times [2021-02-23 17:38:13,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:13,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956400214] [2021-02-23 17:38:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:13,681 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:13,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:13,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:13,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:13,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:13,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:13,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:13,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:13,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:38:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:13,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:13,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:13,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:13,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:13,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:38:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:13,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:13,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:13,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:13,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:13,978 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 17:38:13,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956400214] [2021-02-23 17:38:13,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:13,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:38:13,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487431539] [2021-02-23 17:38:13,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:38:13,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:14,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:38:14,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:38:14,010 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 4 states. [2021-02-23 17:38:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:14,403 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2021-02-23 17:38:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:38:14,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2021-02-23 17:38:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:14,418 INFO L225 Difference]: With dead ends: 161 [2021-02-23 17:38:14,418 INFO L226 Difference]: Without dead ends: 82 [2021-02-23 17:38:14,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 17:38:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-23 17:38:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-02-23 17:38:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-23 17:38:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2021-02-23 17:38:14,488 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 39 [2021-02-23 17:38:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:14,488 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2021-02-23 17:38:14,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:38:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2021-02-23 17:38:14,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-23 17:38:14,492 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:14,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:38:14,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:38:14,493 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:14,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:14,494 INFO L82 PathProgramCache]: Analyzing trace with hash -97548509, now seen corresponding path program 1 times [2021-02-23 17:38:14,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:14,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702662112] [2021-02-23 17:38:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:14,503 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:14,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:14,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:38:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:14,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:14,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:38:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:14,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:14,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:14,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:14,843 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 17:38:14,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702662112] [2021-02-23 17:38:14,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:14,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:38:14,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129202948] [2021-02-23 17:38:14,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:38:14,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:14,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:38:14,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:38:14,858 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 6 states. [2021-02-23 17:38:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:15,235 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-02-23 17:38:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:38:15,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-02-23 17:38:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:15,240 INFO L225 Difference]: With dead ends: 116 [2021-02-23 17:38:15,240 INFO L226 Difference]: Without dead ends: 87 [2021-02-23 17:38:15,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:38:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-23 17:38:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-02-23 17:38:15,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-23 17:38:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-02-23 17:38:15,261 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 46 [2021-02-23 17:38:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:15,262 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-02-23 17:38:15,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:38:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-02-23 17:38:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-23 17:38:15,264 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:15,264 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 17:38:15,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:38:15,265 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:15,265 INFO L82 PathProgramCache]: Analyzing trace with hash 668113358, now seen corresponding path program 1 times [2021-02-23 17:38:15,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:15,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723787701] [2021-02-23 17:38:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:15,268 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,306 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:38:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 17:38:15,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:38:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:15,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:15,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:15,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:15,456 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 17:38:15,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723787701] [2021-02-23 17:38:15,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:15,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:38:15,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982185066] [2021-02-23 17:38:15,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:38:15,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:15,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:38:15,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:38:15,459 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 6 states. [2021-02-23 17:38:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:15,751 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2021-02-23 17:38:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:38:15,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2021-02-23 17:38:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:15,754 INFO L225 Difference]: With dead ends: 120 [2021-02-23 17:38:15,754 INFO L226 Difference]: Without dead ends: 91 [2021-02-23 17:38:15,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:38:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-23 17:38:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-02-23 17:38:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-23 17:38:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-02-23 17:38:15,770 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 49 [2021-02-23 17:38:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:15,770 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-02-23 17:38:15,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:38:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-02-23 17:38:15,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-23 17:38:15,772 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:15,773 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 17:38:15,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:38:15,773 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1380588046, now seen corresponding path program 1 times [2021-02-23 17:38:15,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:15,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751275905] [2021-02-23 17:38:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:15,776 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:38:15,798 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:38:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:38:15,818 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:38:15,851 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:38:15,851 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:38:15,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:38:15,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:38:15 BoogieIcfgContainer [2021-02-23 17:38:15,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:38:15,871 INFO L168 Benchmark]: Toolchain (without parser) took 3582.66 ms. Allocated memory was 172.0 MB in the beginning and 221.2 MB in the end (delta: 49.3 MB). Free memory was 148.2 MB in the beginning and 184.7 MB in the end (delta: -36.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:15,872 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 172.0 MB. Free memory is still 147.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:38:15,872 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.95 ms. Allocated memory is still 172.0 MB. Free memory was 146.9 MB in the beginning and 136.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:15,873 INFO L168 Benchmark]: Boogie Preprocessor took 46.56 ms. Allocated memory is still 172.0 MB. Free memory was 136.6 MB in the beginning and 134.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:15,874 INFO L168 Benchmark]: RCFGBuilder took 843.04 ms. Allocated memory is still 172.0 MB. Free memory was 134.7 MB in the beginning and 145.2 MB in the end (delta: -10.5 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:15,875 INFO L168 Benchmark]: TraceAbstraction took 2405.62 ms. Allocated memory was 172.0 MB in the beginning and 221.2 MB in the end (delta: 49.3 MB). Free memory was 144.7 MB in the beginning and 184.7 MB in the end (delta: -40.0 MB). Peak memory consumption was 9.3 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:15,878 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 172.0 MB. Free memory is still 147.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 266.95 ms. Allocated memory is still 172.0 MB. Free memory was 146.9 MB in the beginning and 136.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.56 ms. Allocated memory is still 172.0 MB. Free memory was 136.6 MB in the beginning and 134.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 843.04 ms. Allocated memory is still 172.0 MB. Free memory was 134.7 MB in the beginning and 145.2 MB in the end (delta: -10.5 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2405.62 ms. Allocated memory was 172.0 MB in the beginning and 221.2 MB in the end (delta: 49.3 MB). Free memory was 144.7 MB in the beginning and 184.7 MB in the end (delta: -40.0 MB). Peak memory consumption was 9.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 72]: 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 71, overapproximation of someUnaryFLOAToperation at line 67. Possible FailurePath: [L66] float x = 0.0f; [L67] float y = -0.0f; [L68] CALL, EXPR fmin_float(x, y) [L38] CALL, EXPR __fpclassify_float(x) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] RET, EXPR __fpclassify_float(x) [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] RET, EXPR fmin_float(x, y) [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 93 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 270 SDtfs, 53 SDslu, 492 SDs, 0 SdLazy, 364 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...