/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/loop-floats-scientific-comp/loop1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:38:18,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:38:18,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:38:18,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 17:38:18,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 17:38:18,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 17:38:18,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 17:38:18,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 17:38:18,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 17:38:18,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 17:38:18,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 17:38:18,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 17:38:18,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:38:18,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:38:18,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:38:18,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:38:18,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:38:18,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:38:18,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:38:18,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:38:18,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:38:18,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:38:18,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:38:18,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:38:18,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:38:18,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:38:18,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:38:18,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:38:18,633 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 17:38:18,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:38:18,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:38:18,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:38:18,662 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:38:18,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:38:18,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:38:18,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:38:18,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:38:18,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:38:18,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:38:18,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:38:18,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:38:18,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:38:18,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:38:18,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:38:18,665 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:38:18,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:38:18,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:38:18,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:38:18,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:38:18,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:38:18,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:38:18,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:38:19,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:38:19,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:38:19,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:38:19,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:38:19,113 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:38:19,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2021-02-23 17:38:19,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c098b8d/5ef828512d864335aa7c056d9103b732/FLAGe2911ede1 [2021-02-23 17:38:19,793 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:38:19,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2021-02-23 17:38:19,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c098b8d/5ef828512d864335aa7c056d9103b732/FLAGe2911ede1 [2021-02-23 17:38:20,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c098b8d/5ef828512d864335aa7c056d9103b732 [2021-02-23 17:38:20,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:38:20,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:38:20,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:38:20,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:38:20,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:38:20,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:38:20" (1/1) ... [2021-02-23 17:38:20,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5695aca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20, skipping insertion in model container [2021-02-23 17:38:20,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:38:20" (1/1) ... [2021-02-23 17:38:20,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:38:20,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:38:20,338 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-02-23 17:38:20,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:38:20,366 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:38:20,381 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-02-23 17:38:20,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:38:20,404 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:38:20,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20 WrapperNode [2021-02-23 17:38:20,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:38:20,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:38:20,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:38:20,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:38:20,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20" (1/1) ... [2021-02-23 17:38:20,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20" (1/1) ... [2021-02-23 17:38:20,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20" (1/1) ... [2021-02-23 17:38:20,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20" (1/1) ... [2021-02-23 17:38:20,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20" (1/1) ... [2021-02-23 17:38:20,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20" (1/1) ... [2021-02-23 17:38:20,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20" (1/1) ... [2021-02-23 17:38:20,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:38:20,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:38:20,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:38:20,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:38:20,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:38:20,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:38:20,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:38:20,569 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:38:20,569 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 17:38:20,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 17:38:20,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:38:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-23 17:38:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:38:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:38:20,571 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:38:20,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:38:20,571 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 17:38:20,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 17:38:20,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:38:20,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:38:20,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:38:20,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:38:20,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:38:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:38:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:38:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:38:21,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:38:21,109 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 17:38:21,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:38:21 BoogieIcfgContainer [2021-02-23 17:38:21,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:38:21,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:38:21,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:38:21,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:38:21,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:38:20" (1/3) ... [2021-02-23 17:38:21,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e231ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:38:21, skipping insertion in model container [2021-02-23 17:38:21,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:20" (2/3) ... [2021-02-23 17:38:21,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e231ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:38:21, skipping insertion in model container [2021-02-23 17:38:21,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:38:21" (3/3) ... [2021-02-23 17:38:21,120 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-02-23 17:38:21,128 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:38:21,132 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:38:21,157 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:38:21,191 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:38:21,192 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:38:21,192 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:38:21,192 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:38:21,192 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:38:21,192 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:38:21,192 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:38:21,193 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:38:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-23 17:38:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 17:38:21,229 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:21,231 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] [2021-02-23 17:38:21,231 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:21,241 INFO L82 PathProgramCache]: Analyzing trace with hash 755972460, now seen corresponding path program 1 times [2021-02-23 17:38:21,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:21,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997514214] [2021-02-23 17:38:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:21,347 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:21,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:21,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:21,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:21,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:21,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:21,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:21,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:21,667 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 17:38:21,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997514214] [2021-02-23 17:38:21,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:21,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 17:38:21,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157571043] [2021-02-23 17:38:21,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 17:38:21,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:21,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 17:38:21,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 17:38:21,703 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2021-02-23 17:38:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:21,870 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-02-23 17:38:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 17:38:21,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2021-02-23 17:38:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:21,887 INFO L225 Difference]: With dead ends: 54 [2021-02-23 17:38:21,887 INFO L226 Difference]: Without dead ends: 34 [2021-02-23 17:38:21,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 17:38:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-23 17:38:21,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-23 17:38:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-23 17:38:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-02-23 17:38:21,967 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2021-02-23 17:38:21,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:21,968 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-02-23 17:38:21,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 17:38:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-02-23 17:38:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-23 17:38:21,970 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:21,970 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] [2021-02-23 17:38:21,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:38:21,971 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:21,972 INFO L82 PathProgramCache]: Analyzing trace with hash 774003679, now seen corresponding path program 1 times [2021-02-23 17:38:21,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:21,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535071617] [2021-02-23 17:38:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:21,988 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:38:22,053 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:38:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:38:22,074 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:38:22,107 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:38:22,107 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:38:22,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:38:22,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:38:22 BoogieIcfgContainer [2021-02-23 17:38:22,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:38:22,127 INFO L168 Benchmark]: Toolchain (without parser) took 1975.31 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 95.7 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:22,128 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:38:22,129 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.89 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:22,130 INFO L168 Benchmark]: Boogie Preprocessor took 40.71 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:22,132 INFO L168 Benchmark]: RCFGBuilder took 663.61 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 131.9 MB in the end (delta: -17.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:22,133 INFO L168 Benchmark]: TraceAbstraction took 1012.48 ms. Allocated memory is still 151.0 MB. Free memory was 131.3 MB in the beginning and 95.7 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:22,137 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.89 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.71 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 663.61 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 131.9 MB in the end (delta: -17.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1012.48 ms. Allocated memory is still 151.0 MB. Free memory was 131.3 MB in the beginning and 95.7 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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 37, overapproximation of someBinaryArithmeticFLOAToperation at line 30. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L37] CALL __VERIFIER_assert( result >= exp ) [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 25 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...