/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:56:13,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:56:14,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:56:14,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:56:14,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:56:14,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:56:14,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:56:14,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:56:14,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:56:14,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:56:14,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:56:14,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:56:14,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:56:14,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:56:14,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:56:14,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:56:14,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:56:14,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:56:14,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:56:14,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:56:14,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:56:14,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:56:14,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:56:14,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:56:14,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:56:14,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:56:14,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:56:14,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:56:14,113 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 17:56:14,174 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:56:14,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:56:14,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:56:14,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:56:14,178 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:56:14,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:56:14,180 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:56:14,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:56:14,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:56:14,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:56:14,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:56:14,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:56:14,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:56:14,182 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:56:14,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:56:14,182 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:56:14,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:56:14,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:56:14,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:56:14,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:56:14,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:56:14,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:56:14,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:56:14,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:56:14,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:56:14,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:56:14,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:56:14,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:56:14,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:56:14,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:56:14,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:56:14,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:56:14,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:56:14,648 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:56:14,648 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:56:14,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-10-23 17:56:14,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538bb4a4/93090b381fa946bd93d65f6b4a3f7764/FLAGb2e6d5ece [2020-10-23 17:56:15,425 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:56:15,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-10-23 17:56:15,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538bb4a4/93090b381fa946bd93d65f6b4a3f7764/FLAGb2e6d5ece [2020-10-23 17:56:15,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538bb4a4/93090b381fa946bd93d65f6b4a3f7764 [2020-10-23 17:56:15,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:56:15,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:56:15,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:15,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:56:15,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:56:15,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:15" (1/1) ... [2020-10-23 17:56:15,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5104b476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:15, skipping insertion in model container [2020-10-23 17:56:15,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:15" (1/1) ... [2020-10-23 17:56:15,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:56:15,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:56:16,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:16,039 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:56:16,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:16,073 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:56:16,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:16 WrapperNode [2020-10-23 17:56:16,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:16,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:56:16,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:56:16,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:56:16,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:16" (1/1) ... [2020-10-23 17:56:16,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:16" (1/1) ... [2020-10-23 17:56:16,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:16" (1/1) ... [2020-10-23 17:56:16,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:16" (1/1) ... [2020-10-23 17:56:16,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:16" (1/1) ... [2020-10-23 17:56:16,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:16" (1/1) ... [2020-10-23 17:56:16,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:16" (1/1) ... [2020-10-23 17:56:16,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:56:16,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:56:16,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:56:16,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:56:16,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:16" (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 [2020-10-23 17:56:16,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:56:16,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:56:16,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:56:16,192 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 17:56:16,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 17:56:16,192 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:56:16,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-23 17:56:16,192 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:56:16,193 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:56:16,193 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:56:16,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:56:16,193 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 17:56:16,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 17:56:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 17:56:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:56:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:56:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:56:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:56:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:56:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:56:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:56:16,499 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:56:16,499 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 17:56:16,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:16 BoogieIcfgContainer [2020-10-23 17:56:16,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:56:16,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:56:16,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:56:16,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:56:16,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:56:15" (1/3) ... [2020-10-23 17:56:16,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef3dcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:16, skipping insertion in model container [2020-10-23 17:56:16,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:16" (2/3) ... [2020-10-23 17:56:16,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef3dcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:16, skipping insertion in model container [2020-10-23 17:56:16,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:16" (3/3) ... [2020-10-23 17:56:16,515 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-10-23 17:56:16,560 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:56:16,571 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:56:16,604 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:56:16,647 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:56:16,647 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:56:16,647 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:56:16,647 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:56:16,647 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:56:16,648 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:56:16,648 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:56:16,648 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:56:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-23 17:56:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 17:56:16,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:16,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:16,674 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:16,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1812719549, now seen corresponding path program 1 times [2020-10-23 17:56:16,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:16,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334348980] [2020-10-23 17:56:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:16,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:56:16,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334348980] [2020-10-23 17:56:16,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:16,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 17:56:16,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466261132] [2020-10-23 17:56:16,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 17:56:16,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:17,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 17:56:17,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 17:56:17,014 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-23 17:56:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:17,105 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-23 17:56:17,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 17:56:17,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-23 17:56:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:17,117 INFO L225 Difference]: With dead ends: 37 [2020-10-23 17:56:17,117 INFO L226 Difference]: Without dead ends: 14 [2020-10-23 17:56:17,121 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 [2020-10-23 17:56:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-23 17:56:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-23 17:56:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-23 17:56:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-23 17:56:17,167 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-23 17:56:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:17,167 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-23 17:56:17,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 17:56:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-23 17:56:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 17:56:17,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:17,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:17,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:56:17,169 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash 709604994, now seen corresponding path program 1 times [2020-10-23 17:56:17,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:17,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402802002] [2020-10-23 17:56:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:56:17,221 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:56:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:56:17,242 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:56:17,268 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 17:56:17,269 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 17:56:17,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:56:17,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:56:17 BoogieIcfgContainer [2020-10-23 17:56:17,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:56:17,302 INFO L168 Benchmark]: Toolchain (without parser) took 1496.27 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 105.4 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:17,303 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.5 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:56:17,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.86 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:17,306 INFO L168 Benchmark]: Boogie Preprocessor took 37.13 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:17,307 INFO L168 Benchmark]: RCFGBuilder took 388.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 101.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:17,307 INFO L168 Benchmark]: TraceAbstraction took 796.05 ms. Allocated memory is still 151.0 MB. Free memory was 100.8 MB in the beginning and 105.4 MB in the end (delta: -4.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:56:17,311 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.5 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.86 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.13 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 388.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 101.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 796.05 ms. Allocated memory is still 151.0 MB. Free memory was 100.8 MB in the beginning and 105.4 MB in the end (delta: -4.7 MB). There was no memory consumed. 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 29. 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 ; VAL [count=1, exp=1, term=1, x=52] [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 VAL [count=2, temp=0, x=52] [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, 28 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: 19 SDtfs, 11 SDslu, 3 SDs, 0 SdLazy, 4 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=24occurred 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, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 451 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...