/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 04:47:29,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 04:47:29,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 04:47:29,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 04:47:29,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 04:47:29,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 04:47:29,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 04:47:29,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 04:47:29,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 04:47:29,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 04:47:29,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 04:47:29,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 04:47:29,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 04:47:29,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 04:47:29,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 04:47:29,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 04:47:29,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 04:47:29,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 04:47:29,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 04:47:29,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 04:47:29,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 04:47:29,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 04:47:29,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 04:47:29,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 04:47:29,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 04:47:29,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 04:47:29,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 04:47:29,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 04:47:29,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 04:47:29,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 04:47:29,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 04:47:29,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 04:47:29,338 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 04:47:29,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 04:47:29,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 04:47:29,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 04:47:29,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 04:47:29,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 04:47:29,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 04:47:29,340 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 04:47:29,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 04:47:29,341 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 04:47:29,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 04:47:29,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 04:47:29,341 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 04:47:29,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 04:47:29,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 04:47:29,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 04:47:29,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 04:47:29,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 04:47:29,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 04:47:29,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 04:47:29,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 04:47:29,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 04:47:29,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 04:47:29,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 04:47:29,769 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 04:47:29,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-11-07 04:47:29,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc7d1e422/68dba2c2641144aeb0f7e59404e06e92/FLAG6e0565fa8 [2020-11-07 04:47:30,431 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 04:47:30,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-11-07 04:47:30,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc7d1e422/68dba2c2641144aeb0f7e59404e06e92/FLAG6e0565fa8 [2020-11-07 04:47:30,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc7d1e422/68dba2c2641144aeb0f7e59404e06e92 [2020-11-07 04:47:30,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 04:47:30,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 04:47:30,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 04:47:30,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 04:47:30,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 04:47:30,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:47:30" (1/1) ... [2020-11-07 04:47:30,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62298b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:30, skipping insertion in model container [2020-11-07 04:47:30,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:47:30" (1/1) ... [2020-11-07 04:47:30,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 04:47:30,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 04:47:31,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:47:31,042 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 04:47:31,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:47:31,079 INFO L208 MainTranslator]: Completed translation [2020-11-07 04:47:31,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:31 WrapperNode [2020-11-07 04:47:31,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 04:47:31,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 04:47:31,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 04:47:31,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 04:47:31,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:31" (1/1) ... [2020-11-07 04:47:31,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:31" (1/1) ... [2020-11-07 04:47:31,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:31" (1/1) ... [2020-11-07 04:47:31,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:31" (1/1) ... [2020-11-07 04:47:31,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:31" (1/1) ... [2020-11-07 04:47:31,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:31" (1/1) ... [2020-11-07 04:47:31,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:31" (1/1) ... [2020-11-07 04:47:31,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 04:47:31,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 04:47:31,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 04:47:31,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 04:47:31,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:31" (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 [2020-11-07 04:47:31,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 04:47:31,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 04:47:31,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 04:47:31,283 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 04:47:31,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 04:47:31,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 04:47:31,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-11-07 04:47:31,284 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 04:47:31,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 04:47:31,285 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 04:47:31,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 04:47:31,285 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 04:47:31,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 04:47:31,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 04:47:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 04:47:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 04:47:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 04:47:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 04:47:31,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 04:47:31,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 04:47:31,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 04:47:31,778 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 04:47:31,778 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 04:47:31,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:47:31 BoogieIcfgContainer [2020-11-07 04:47:31,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 04:47:31,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 04:47:31,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 04:47:31,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 04:47:31,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:47:30" (1/3) ... [2020-11-07 04:47:31,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54253f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:47:31, skipping insertion in model container [2020-11-07 04:47:31,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:31" (2/3) ... [2020-11-07 04:47:31,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54253f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:47:31, skipping insertion in model container [2020-11-07 04:47:31,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:47:31" (3/3) ... [2020-11-07 04:47:31,790 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-11-07 04:47:31,808 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 04:47:31,812 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 04:47:31,826 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 04:47:31,852 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 04:47:31,852 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 04:47:31,853 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 04:47:31,853 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 04:47:31,853 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 04:47:31,853 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 04:47:31,853 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 04:47:31,854 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 04:47:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-11-07 04:47:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 04:47:31,883 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:47:31,884 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] [2020-11-07 04:47:31,885 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:47:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:47:31,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1402496090, now seen corresponding path program 1 times [2020-11-07 04:47:31,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:47:31,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154995968] [2020-11-07 04:47:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:47:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:47:32,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:47:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:47:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 04:47:32,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154995968] [2020-11-07 04:47:32,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 04:47:32,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 04:47:32,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455075568] [2020-11-07 04:47:32,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 04:47:32,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:47:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 04:47:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 04:47:32,213 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-11-07 04:47:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:47:32,340 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-07 04:47:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 04:47:32,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-11-07 04:47:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:47:32,351 INFO L225 Difference]: With dead ends: 58 [2020-11-07 04:47:32,351 INFO L226 Difference]: Without dead ends: 35 [2020-11-07 04:47:32,355 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 [2020-11-07 04:47:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-07 04:47:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-07 04:47:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-07 04:47:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-11-07 04:47:32,409 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 25 [2020-11-07 04:47:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:47:32,410 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-11-07 04:47:32,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 04:47:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-11-07 04:47:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 04:47:32,412 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:47:32,412 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] [2020-11-07 04:47:32,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 04:47:32,413 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:47:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:47:32,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1202200620, now seen corresponding path program 1 times [2020-11-07 04:47:32,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:47:32,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129888523] [2020-11-07 04:47:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:47:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:47:32,454 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:47:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:47:32,505 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:47:32,540 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 04:47:32,540 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 04:47:32,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 04:47:32,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:47:32 BoogieIcfgContainer [2020-11-07 04:47:32,587 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 04:47:32,592 INFO L168 Benchmark]: Toolchain (without parser) took 1786.64 ms. Allocated memory was 161.5 MB in the beginning and 194.0 MB in the end (delta: 32.5 MB). Free memory was 144.8 MB in the beginning and 173.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 49.6 MB. Max. memory is 8.0 GB. [2020-11-07 04:47:32,594 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 161.5 MB. Free memory is still 134.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 04:47:32,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.49 ms. Allocated memory is still 161.5 MB. Free memory was 144.2 MB in the beginning and 134.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 04:47:32,597 INFO L168 Benchmark]: Boogie Preprocessor took 76.50 ms. Allocated memory is still 161.5 MB. Free memory was 134.1 MB in the beginning and 144.8 MB in the end (delta: -10.7 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. [2020-11-07 04:47:32,598 INFO L168 Benchmark]: RCFGBuilder took 621.73 ms. Allocated memory is still 161.5 MB. Free memory was 144.8 MB in the beginning and 130.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-07 04:47:32,599 INFO L168 Benchmark]: TraceAbstraction took 805.32 ms. Allocated memory was 161.5 MB in the beginning and 194.0 MB in the end (delta: 32.5 MB). Free memory was 129.7 MB in the beginning and 173.0 MB in the end (delta: -43.3 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2020-11-07 04:47:32,608 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 161.5 MB. Free memory is still 134.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.49 ms. Allocated memory is still 161.5 MB. Free memory was 144.2 MB in the beginning and 134.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.50 ms. Allocated memory is still 161.5 MB. Free memory was 134.1 MB in the beginning and 144.8 MB in the end (delta: -10.7 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 621.73 ms. Allocated memory is still 161.5 MB. Free memory was 144.8 MB in the beginning and 130.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 805.32 ms. Allocated memory was 161.5 MB in the beginning and 194.0 MB in the end (delta: 32.5 MB). Free memory was 129.7 MB in the beginning and 173.0 MB in the end (delta: -43.3 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: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 30. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; VAL [__VERIFIER_nondet_float()=50, x=50] [L21] float exp = 1.0 ; VAL [exp=1, x=50] [L22] float term = 1.0 ; VAL [exp=1, term=1, x=50] [L23] unsigned int count = 1 ; VAL [count=1, exp=1, term=1, x=50] [L24] float result = 2*(1/(1-x)) ; VAL [count=1, exp=1, term=1, x=50] [L25] int temp ; VAL [count=1, exp=1, term=1, x=50] [L27] COND TRUE 1 VAL [count=1, exp=1, term=1, x=50] [L29] term = term * (x/count) VAL [count=1, exp=1, x=50] [L30] exp = exp + term VAL [count=1, x=50] [L31] count++ VAL [count=2, x=50] [L33] temp = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, count=2, temp=0, x=50] [L34] COND TRUE temp ==0 VAL [count=2, temp=0, x=50] [L37] CALL __VERIFIER_assert( result >= exp ) VAL [\old(cond)=0] [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L14] CALL reach_error() [L9] __assert_fail("0", "loop1-2.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 25 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 3 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=45occurred 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: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1296 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...