/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 0.2.1-dev-b7b32d2 [2021-02-21 15:48:06,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 15:48:06,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 15:48:06,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 15:48:06,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 15:48:06,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 15:48:06,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 15:48:06,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 15:48:06,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 15:48:06,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 15:48:06,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 15:48:06,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 15:48:06,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 15:48:06,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 15:48:06,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 15:48:06,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 15:48:06,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 15:48:06,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 15:48:06,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 15:48:06,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 15:48:06,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 15:48:06,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 15:48:06,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 15:48:06,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 15:48:06,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 15:48:06,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 15:48:06,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 15:48:06,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 15:48:06,553 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 [2021-02-21 15:48:06,611 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 15:48:06,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 15:48:06,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 15:48:06,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 15:48:06,616 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 15:48:06,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 15:48:06,616 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 15:48:06,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 15:48:06,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 15:48:06,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 15:48:06,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 15:48:06,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 15:48:06,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 15:48:06,620 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 15:48:06,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 15:48:06,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 15:48:06,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 15:48:06,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 15:48:06,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 15:48:06,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 15:48:06,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 15:48:06,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 15:48:06,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 15:48:06,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 15:48:06,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 15:48:06,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 15:48:06,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 15:48:06,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 15:48:06,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 15:48:07,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 15:48:07,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 15:48:07,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 15:48:07,087 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 15:48:07,088 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 15:48:07,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2021-02-21 15:48:07,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9b95915f/c3125d8ab93b4e80830ec86dda29491b/FLAGde1f5fa5a [2021-02-21 15:48:07,809 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 15:48:07,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2021-02-21 15:48:07,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9b95915f/c3125d8ab93b4e80830ec86dda29491b/FLAGde1f5fa5a [2021-02-21 15:48:08,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9b95915f/c3125d8ab93b4e80830ec86dda29491b [2021-02-21 15:48:08,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 15:48:08,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 15:48:08,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 15:48:08,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 15:48:08,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 15:48:08,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e904254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08, skipping insertion in model container [2021-02-21 15:48:08,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 15:48:08,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 15:48:08,444 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] [2021-02-21 15:48:08,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:48:08,478 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 15:48:08,494 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] [2021-02-21 15:48:08,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:48:08,525 INFO L208 MainTranslator]: Completed translation [2021-02-21 15:48:08,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08 WrapperNode [2021-02-21 15:48:08,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 15:48:08,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 15:48:08,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 15:48:08,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 15:48:08,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 15:48:08,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 15:48:08,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 15:48:08,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 15:48:08,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (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 [2021-02-21 15:48:08,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 15:48:08,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 15:48:08,657 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 15:48:08,657 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 15:48:08,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 15:48:08,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 15:48:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-21 15:48:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 15:48:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 15:48:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 15:48:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 15:48:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 15:48:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 15:48:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 15:48:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 15:48:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 15:48:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 15:48:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 15:48:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 15:48:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 15:48:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 15:48:08,954 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 15:48:08,954 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 15:48:08,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:48:08 BoogieIcfgContainer [2021-02-21 15:48:08,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 15:48:08,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 15:48:08,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 15:48:08,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 15:48:08,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 03:48:08" (1/3) ... [2021-02-21 15:48:08,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bf5b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:48:08, skipping insertion in model container [2021-02-21 15:48:08,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (2/3) ... [2021-02-21 15:48:08,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bf5b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:48:08, skipping insertion in model container [2021-02-21 15:48:08,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:48:08" (3/3) ... [2021-02-21 15:48:08,965 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-02-21 15:48:08,973 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 15:48:08,978 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 15:48:09,011 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 15:48:09,041 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 15:48:09,042 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 15:48:09,042 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 15:48:09,042 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 15:48:09,042 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 15:48:09,043 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 15:48:09,043 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 15:48:09,043 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 15:48:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-02-21 15:48:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-21 15:48:09,082 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:48:09,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:48:09,086 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:48:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:48:09,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1965494288, now seen corresponding path program 1 times [2021-02-21 15:48:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:48:09,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575845694] [2021-02-21 15:48:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:48:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:09,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:09,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:09,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:09,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:09,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:48:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:09,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:09,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 15:48:09,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575845694] [2021-02-21 15:48:09,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:48:09,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 15:48:09,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300440330] [2021-02-21 15:48:09,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 15:48:09,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:48:09,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 15:48:09,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 15:48:09,556 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2021-02-21 15:48:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:48:09,612 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-02-21 15:48:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 15:48:09,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-02-21 15:48:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:48:09,621 INFO L225 Difference]: With dead ends: 32 [2021-02-21 15:48:09,622 INFO L226 Difference]: Without dead ends: 13 [2021-02-21 15:48:09,625 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 [2021-02-21 15:48:09,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-02-21 15:48:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-02-21 15:48:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-02-21 15:48:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-02-21 15:48:09,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-02-21 15:48:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:48:09,669 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-02-21 15:48:09,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 15:48:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-02-21 15:48:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-21 15:48:09,670 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:48:09,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:48:09,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 15:48:09,670 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:48:09,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:48:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash -766285710, now seen corresponding path program 1 times [2021-02-21 15:48:09,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:48:09,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837738429] [2021-02-21 15:48:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:48:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:48:09,711 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:48:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:48:09,734 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:48:09,768 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 15:48:09,768 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 15:48:09,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 15:48:09,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 03:48:09 BoogieIcfgContainer [2021-02-21 15:48:09,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 15:48:09,801 INFO L168 Benchmark]: Toolchain (without parser) took 1640.55 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 103.1 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:09,802 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 15:48:09,803 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.81 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 115.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:09,803 INFO L168 Benchmark]: Boogie Preprocessor took 38.51 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 113.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:09,804 INFO L168 Benchmark]: RCFGBuilder took 390.22 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 133.6 MB in the end (delta: -20.1 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:09,805 INFO L168 Benchmark]: TraceAbstraction took 840.44 ms. Allocated memory is still 151.0 MB. Free memory was 133.0 MB in the beginning and 103.1 MB in the end (delta: 29.9 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:09,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 349.81 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 115.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.51 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 113.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 390.22 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 133.6 MB in the end (delta: -20.1 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 840.44 ms. Allocated memory is still 151.0 MB. Free memory was 133.0 MB in the beginning and 103.1 MB in the end (delta: 29.9 MB). Peak memory consumption was 28.3 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 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] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 11 SDslu, 3 SDs, 0 SdLazy, 4 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=20occurred 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, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 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...