/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 03:56:20,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 03:56:20,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 03:56:20,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 03:56:20,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 03:56:20,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 03:56:20,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 03:56:20,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 03:56:20,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 03:56:20,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 03:56:20,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 03:56:20,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 03:56:20,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 03:56:20,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 03:56:20,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 03:56:20,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 03:56:20,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 03:56:20,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 03:56:20,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 03:56:20,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 03:56:20,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 03:56:20,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 03:56:20,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 03:56:21,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 03:56:21,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 03:56:21,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 03:56:21,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 03:56:21,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 03:56:21,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 03:56:21,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 03:56:21,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 03:56:21,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 03:56:21,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 03:56:21,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 03:56:21,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 03:56:21,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 03:56:21,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 03:56:21,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 03:56:21,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 03:56:21,063 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 03:56:21,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 03:56:21,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 03:56:21,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 03:56:21,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 03:56:21,065 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 03:56:21,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 03:56:21,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 03:56:21,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 03:56:21,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 03:56:21,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 03:56:21,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 03:56:21,067 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 03:56:21,067 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 03:56:21,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 03:56:21,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 03:56:21,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 03:56:21,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 03:56:21,548 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 03:56:21,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2021-02-24 03:56:21,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c49d02788/c8d5761811b8481eaaaa3a87e68dcc75/FLAG34403692b [2021-02-24 03:56:22,322 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 03:56:22,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2021-02-24 03:56:22,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c49d02788/c8d5761811b8481eaaaa3a87e68dcc75/FLAG34403692b [2021-02-24 03:56:22,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c49d02788/c8d5761811b8481eaaaa3a87e68dcc75 [2021-02-24 03:56:22,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 03:56:22,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 03:56:22,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 03:56:22,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 03:56:22,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 03:56:22,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:56:22" (1/1) ... [2021-02-24 03:56:22,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7294811e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:22, skipping insertion in model container [2021-02-24 03:56:22,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:56:22" (1/1) ... [2021-02-24 03:56:22,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 03:56:22,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 03:56:22,992 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-02-24 03:56:23,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:56:23,021 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 03:56:23,034 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-02-24 03:56:23,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:56:23,057 INFO L208 MainTranslator]: Completed translation [2021-02-24 03:56:23,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:23 WrapperNode [2021-02-24 03:56:23,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 03:56:23,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 03:56:23,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 03:56:23,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 03:56:23,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:23" (1/1) ... [2021-02-24 03:56:23,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:23" (1/1) ... [2021-02-24 03:56:23,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:23" (1/1) ... [2021-02-24 03:56:23,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:23" (1/1) ... [2021-02-24 03:56:23,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:23" (1/1) ... [2021-02-24 03:56:23,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:23" (1/1) ... [2021-02-24 03:56:23,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:23" (1/1) ... [2021-02-24 03:56:23,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 03:56:23,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 03:56:23,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 03:56:23,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 03:56:23,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 03:56:23,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 03:56:23,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 03:56:23,227 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 03:56:23,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 03:56:23,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 03:56:23,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 03:56:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-24 03:56:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 03:56:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 03:56:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 03:56:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 03:56:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 03:56:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 03:56:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 03:56:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 03:56:23,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 03:56:23,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 03:56:23,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 03:56:23,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 03:56:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 03:56:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 03:56:23,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 03:56:23,742 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 03:56:23,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:56:23 BoogieIcfgContainer [2021-02-24 03:56:23,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 03:56:23,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 03:56:23,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 03:56:23,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 03:56:23,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:56:22" (1/3) ... [2021-02-24 03:56:23,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139239ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:56:23, skipping insertion in model container [2021-02-24 03:56:23,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:23" (2/3) ... [2021-02-24 03:56:23,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139239ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:56:23, skipping insertion in model container [2021-02-24 03:56:23,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:56:23" (3/3) ... [2021-02-24 03:56:23,767 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-02-24 03:56:23,787 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 03:56:23,794 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 03:56:23,823 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 03:56:23,861 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 03:56:23,861 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 03:56:23,861 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 03:56:23,862 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 03:56:23,862 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 03:56:23,862 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 03:56:23,862 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 03:56:23,862 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 03:56:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-24 03:56:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-24 03:56:23,892 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:56:23,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 03:56:23,894 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:56:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:56:23,900 INFO L82 PathProgramCache]: Analyzing trace with hash 755972460, now seen corresponding path program 1 times [2021-02-24 03:56:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:56:23,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126545016] [2021-02-24 03:56:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:56:23,985 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:56:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:24,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:24,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:24,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:24,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:24,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 03:56:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:24,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:24,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 03:56:24,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126545016] [2021-02-24 03:56:24,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 03:56:24,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 03:56:24,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469614731] [2021-02-24 03:56:24,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 03:56:24,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 03:56:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 03:56:24,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 03:56:24,199 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2021-02-24 03:56:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 03:56:24,285 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-02-24 03:56:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 03:56:24,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2021-02-24 03:56:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 03:56:24,295 INFO L225 Difference]: With dead ends: 54 [2021-02-24 03:56:24,295 INFO L226 Difference]: Without dead ends: 34 [2021-02-24 03:56:24,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 03:56:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-24 03:56:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-24 03:56:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-24 03:56:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-02-24 03:56:24,349 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2021-02-24 03:56:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 03:56:24,350 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-02-24 03:56:24,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 03:56:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-02-24 03:56:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-24 03:56:24,352 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:56:24,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 03:56:24,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 03:56:24,352 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:56:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:56:24,353 INFO L82 PathProgramCache]: Analyzing trace with hash 774003679, now seen corresponding path program 1 times [2021-02-24 03:56:24,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:56:24,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337576115] [2021-02-24 03:56:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:56:24,359 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:56:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:56:24,394 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:56:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:56:24,419 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:56:24,471 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 03:56:24,471 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 03:56:24,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 03:56:24,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 03:56:24 BoogieIcfgContainer [2021-02-24 03:56:24,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 03:56:24,495 INFO L168 Benchmark]: Toolchain (without parser) took 1792.78 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 95.2 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.1 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:24,497 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 124.0 MB in the end (delta: 74.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 03:56:24,501 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.94 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:24,502 INFO L168 Benchmark]: Boogie Preprocessor took 42.98 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:24,503 INFO L168 Benchmark]: RCFGBuilder took 644.78 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 131.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:24,506 INFO L168 Benchmark]: TraceAbstraction took 737.76 ms. Allocated memory is still 151.0 MB. Free memory was 130.9 MB in the beginning and 95.2 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:24,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 124.0 MB in the end (delta: 74.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 338.94 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.98 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 644.78 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 131.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 737.76 ms. Allocated memory is still 151.0 MB. Free memory was 130.9 MB in the beginning and 95.2 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 30. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L37] CALL __VERIFIER_assert( result >= exp ) [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 25 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...