/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 0.2.0-7d8eed3 [2020-11-06 21:58:16,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 21:58:16,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 21:58:16,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 21:58:16,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 21:58:16,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 21:58:16,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 21:58:16,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 21:58:16,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 21:58:16,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 21:58:16,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 21:58:16,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 21:58:16,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 21:58:16,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 21:58:16,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 21:58:16,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 21:58:16,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 21:58:16,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 21:58:16,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 21:58:16,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 21:58:16,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 21:58:16,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 21:58:16,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 21:58:16,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 21:58:16,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 21:58:16,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 21:58:16,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 21:58:16,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 21:58:16,468 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 [2020-11-06 21:58:16,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 21:58:16,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 21:58:16,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 21:58:16,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 21:58:16,498 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 21:58:16,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 21:58:16,499 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 21:58:16,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 21:58:16,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 21:58:16,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 21:58:16,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 21:58:16,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 21:58:16,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 21:58:16,500 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 21:58:16,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 21:58:16,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 21:58:16,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 21:58:16,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 21:58:16,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 21:58:16,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 21:58:16,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 21:58:16,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 21:58:16,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 21:58:16,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 21:58:16,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 21:58:16,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 21:58:16,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 21:58:16,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 21:58:16,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 21:58:16,504 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 21:58:16,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 21:58:16,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 21:58:16,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 21:58:16,981 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 21:58:16,982 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 21:58:16,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-11-06 21:58:17,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fdfcf3e/b652d542ea3f48988e2a8543b8cd1ec9/FLAG4ad657b1a [2020-11-06 21:58:17,798 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 21:58:17,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-11-06 21:58:17,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fdfcf3e/b652d542ea3f48988e2a8543b8cd1ec9/FLAG4ad657b1a [2020-11-06 21:58:18,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fdfcf3e/b652d542ea3f48988e2a8543b8cd1ec9 [2020-11-06 21:58:18,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 21:58:18,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 21:58:18,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 21:58:18,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 21:58:18,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 21:58:18,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:18" (1/1) ... [2020-11-06 21:58:18,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376c3dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18, skipping insertion in model container [2020-11-06 21:58:18,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:18" (1/1) ... [2020-11-06 21:58:18,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 21:58:18,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 21:58:18,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:58:18,436 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 21:58:18,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:58:18,475 INFO L208 MainTranslator]: Completed translation [2020-11-06 21:58:18,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18 WrapperNode [2020-11-06 21:58:18,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 21:58:18,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 21:58:18,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 21:58:18,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 21:58:18,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18" (1/1) ... [2020-11-06 21:58:18,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18" (1/1) ... [2020-11-06 21:58:18,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18" (1/1) ... [2020-11-06 21:58:18,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18" (1/1) ... [2020-11-06 21:58:18,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18" (1/1) ... [2020-11-06 21:58:18,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18" (1/1) ... [2020-11-06 21:58:18,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18" (1/1) ... [2020-11-06 21:58:18,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 21:58:18,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 21:58:18,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 21:58:18,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 21:58:18,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18" (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 [2020-11-06 21:58:18,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 21:58:18,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 21:58:18,613 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 21:58:18,613 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 21:58:18,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 21:58:18,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 21:58:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-11-06 21:58:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 21:58:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 21:58:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 21:58:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 21:58:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 21:58:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 21:58:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 21:58:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 21:58:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 21:58:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 21:58:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 21:58:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 21:58:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 21:58:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 21:58:18,925 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 21:58:18,926 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 21:58:18,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:18 BoogieIcfgContainer [2020-11-06 21:58:18,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 21:58:18,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 21:58:18,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 21:58:18,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 21:58:18,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:58:18" (1/3) ... [2020-11-06 21:58:18,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f839e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:18, skipping insertion in model container [2020-11-06 21:58:18,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:18" (2/3) ... [2020-11-06 21:58:18,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f839e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:18, skipping insertion in model container [2020-11-06 21:58:18,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:18" (3/3) ... [2020-11-06 21:58:18,939 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-11-06 21:58:18,958 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 21:58:18,961 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 21:58:18,976 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 21:58:19,017 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 21:58:19,017 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 21:58:19,018 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 21:58:19,018 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 21:58:19,020 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 21:58:19,020 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 21:58:19,020 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 21:58:19,021 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 21:58:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-06 21:58:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 21:58:19,066 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:19,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:19,067 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:19,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1812719549, now seen corresponding path program 1 times [2020-11-06 21:58:19,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:19,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289005587] [2020-11-06 21:58:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:19,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 21:58:19,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289005587] [2020-11-06 21:58:19,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:58:19,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 21:58:19,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230939815] [2020-11-06 21:58:19,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 21:58:19,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:19,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 21:58:19,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 21:58:19,519 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-11-06 21:58:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:19,607 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-11-06 21:58:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 21:58:19,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-06 21:58:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:19,618 INFO L225 Difference]: With dead ends: 37 [2020-11-06 21:58:19,619 INFO L226 Difference]: Without dead ends: 14 [2020-11-06 21:58:19,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 21:58:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-06 21:58:19,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-06 21:58:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-06 21:58:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-06 21:58:19,667 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-11-06 21:58:19,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:19,668 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-06 21:58:19,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 21:58:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-06 21:58:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 21:58:19,669 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:19,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:19,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 21:58:19,670 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:19,671 INFO L82 PathProgramCache]: Analyzing trace with hash 709604994, now seen corresponding path program 1 times [2020-11-06 21:58:19,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:19,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066364684] [2020-11-06 21:58:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 21:58:19,705 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 21:58:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 21:58:19,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 21:58:19,754 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 21:58:19,754 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 21:58:19,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 21:58:19,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:58:19 BoogieIcfgContainer [2020-11-06 21:58:19,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 21:58:19,791 INFO L168 Benchmark]: Toolchain (without parser) took 1639.71 ms. Allocated memory is still 159.4 MB. Free memory was 134.8 MB in the beginning and 117.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:19,792 INFO L168 Benchmark]: CDTParser took 3.44 ms. Allocated memory is still 159.4 MB. Free memory was 132.3 MB in the beginning and 132.2 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 21:58:19,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.24 ms. Allocated memory is still 159.4 MB. Free memory was 134.2 MB in the beginning and 124.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:19,794 INFO L168 Benchmark]: Boogie Preprocessor took 42.67 ms. Allocated memory is still 159.4 MB. Free memory was 124.6 MB in the beginning and 123.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:19,795 INFO L168 Benchmark]: RCFGBuilder took 408.01 ms. Allocated memory is still 159.4 MB. Free memory was 123.0 MB in the beginning and 109.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:19,796 INFO L168 Benchmark]: TraceAbstraction took 857.73 ms. Allocated memory is still 159.4 MB. Free memory was 109.2 MB in the beginning and 117.3 MB in the end (delta: -8.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 21:58:19,800 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.44 ms. Allocated memory is still 159.4 MB. Free memory was 132.3 MB in the beginning and 132.2 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 316.24 ms. Allocated memory is still 159.4 MB. Free memory was 134.2 MB in the beginning and 124.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.67 ms. Allocated memory is still 159.4 MB. Free memory was 124.6 MB in the beginning and 123.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 408.01 ms. Allocated memory is still 159.4 MB. Free memory was 123.0 MB in the beginning and 109.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 857.73 ms. Allocated memory is still 159.4 MB. Free memory was 109.2 MB in the beginning and 117.3 MB in the end (delta: -8.2 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: 0.7s, 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, 0.1s 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, 0.2s 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...