/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:31,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:31,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:31,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:31,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:31,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:31,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:31,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:31,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:31,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:31,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:31,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:31,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:31,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:31,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:31,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:31,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:31,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:31,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:31,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:31,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:31,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:31,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:31,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:31,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:31,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:31,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:31,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:31,422 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 [2020-07-20 10:45:31,441 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:31,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:31,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:31,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:31,443 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:31,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:31,444 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:31,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:31,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:31,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:31,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:31,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:31,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:31,447 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:31,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:31,447 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:31,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:31,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:31,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:31,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:31,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:31,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:31,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:31,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:31,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:31,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:31,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:31,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:31,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:31,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:45:31,778 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:31,791 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:31,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:31,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:31,797 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:31,798 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop2-1.c [2020-07-20 10:45:31,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93a8337cc/b1b2222a1f0849aebd70e7a5c25be323/FLAG2a0db88f2 [2020-07-20 10:45:32,334 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:32,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop2-1.c [2020-07-20 10:45:32,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93a8337cc/b1b2222a1f0849aebd70e7a5c25be323/FLAG2a0db88f2 [2020-07-20 10:45:32,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93a8337cc/b1b2222a1f0849aebd70e7a5c25be323 [2020-07-20 10:45:32,734 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:32,736 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:32,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:32,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:32,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:32,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:32" (1/1) ... [2020-07-20 10:45:32,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fe720f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32, skipping insertion in model container [2020-07-20 10:45:32,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:32" (1/1) ... [2020-07-20 10:45:32,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:32,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:32,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:32,950 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:32,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:32,984 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:32,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32 WrapperNode [2020-07-20 10:45:32,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:32,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:32,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:32,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:32,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32" (1/1) ... [2020-07-20 10:45:32,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32" (1/1) ... [2020-07-20 10:45:33,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32" (1/1) ... [2020-07-20 10:45:33,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32" (1/1) ... [2020-07-20 10:45:33,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32" (1/1) ... [2020-07-20 10:45:33,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32" (1/1) ... [2020-07-20 10:45:33,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32" (1/1) ... [2020-07-20 10:45:33,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:33,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:33,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:33,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:33,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32" (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 [2020-07-20 10:45:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 10:45:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 10:45:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 10:45:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 10:45:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 10:45:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 10:45:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 10:45:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:33,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:33,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:33,439 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:33,439 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 10:45:33,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:33 BoogieIcfgContainer [2020-07-20 10:45:33,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:33,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:33,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:33,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:33,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:32" (1/3) ... [2020-07-20 10:45:33,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be2cabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:33, skipping insertion in model container [2020-07-20 10:45:33,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:32" (2/3) ... [2020-07-20 10:45:33,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be2cabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:33, skipping insertion in model container [2020-07-20 10:45:33,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:33" (3/3) ... [2020-07-20 10:45:33,477 INFO L109 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-07-20 10:45:33,506 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:33,521 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:33,550 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:33,579 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:33,579 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:33,580 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:33,580 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:33,580 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:33,580 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:33,580 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:33,580 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 10:45:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 10:45:33,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:33,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:33,605 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:33,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:33,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2006691970, now seen corresponding path program 1 times [2020-07-20 10:45:33,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:33,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372568006] [2020-07-20 10:45:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:45:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:45:33,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:33,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372568006] [2020-07-20 10:45:33,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:33,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:45:33,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720560409] [2020-07-20 10:45:33,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:45:33,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:33,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:45:33,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:33,721 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-20 10:45:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:33,742 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-07-20 10:45:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:45:33,743 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-20 10:45:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:33,752 INFO L225 Difference]: With dead ends: 47 [2020-07-20 10:45:33,752 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 10:45:33,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 10:45:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 10:45:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 10:45:33,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 10:45:33,798 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-07-20 10:45:33,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:33,799 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 10:45:33,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:45:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 10:45:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 10:45:33,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:33,802 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] [2020-07-20 10:45:34,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:34,017 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1954110194, now seen corresponding path program 1 times [2020-07-20 10:45:34,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:34,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46297289] [2020-07-20 10:45:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:34,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 10:45:34,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:45:34,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:34,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46297289] [2020-07-20 10:45:34,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:34,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 10:45:34,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255237900] [2020-07-20 10:45:34,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 10:45:34,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:34,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 10:45:34,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:45:34,103 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 3 states. [2020-07-20 10:45:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:34,130 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-07-20 10:45:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 10:45:34,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 10:45:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:34,132 INFO L225 Difference]: With dead ends: 33 [2020-07-20 10:45:34,132 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 10:45:34,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:45:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 10:45:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-20 10:45:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 10:45:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-20 10:45:34,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-07-20 10:45:34,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:34,140 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-20 10:45:34,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 10:45:34,140 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-20 10:45:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 10:45:34,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:34,141 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] [2020-07-20 10:45:34,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:34,342 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:34,343 INFO L82 PathProgramCache]: Analyzing trace with hash -179102832, now seen corresponding path program 1 times [2020-07-20 10:45:34,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:34,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623842802] [2020-07-20 10:45:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:34,381 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:34,394 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:34,413 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:45:34,413 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:45:34,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:34,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:34 BoogieIcfgContainer [2020-07-20 10:45:34,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:45:34,658 INFO L168 Benchmark]: Toolchain (without parser) took 1921.08 ms. Allocated memory was 143.7 MB in the beginning and 205.0 MB in the end (delta: 61.3 MB). Free memory was 106.0 MB in the beginning and 128.2 MB in the end (delta: -22.2 MB). Peak memory consumption was 39.2 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:34,659 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 143.7 MB. Free memory was 124.8 MB in the beginning and 124.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 10:45:34,660 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.56 ms. Allocated memory is still 143.7 MB. Free memory was 105.8 MB in the beginning and 95.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:34,661 INFO L168 Benchmark]: Boogie Preprocessor took 116.72 ms. Allocated memory was 143.7 MB in the beginning and 205.0 MB in the end (delta: 61.3 MB). Free memory was 95.6 MB in the beginning and 183.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:34,662 INFO L168 Benchmark]: RCFGBuilder took 349.95 ms. Allocated memory is still 205.0 MB. Free memory was 183.3 MB in the beginning and 170.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:34,663 INFO L168 Benchmark]: TraceAbstraction took 1199.38 ms. Allocated memory is still 205.0 MB. Free memory was 169.4 MB in the beginning and 128.2 MB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:34,667 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 143.7 MB. Free memory was 124.8 MB in the beginning and 124.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.56 ms. Allocated memory is still 143.7 MB. Free memory was 105.8 MB in the beginning and 95.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.72 ms. Allocated memory was 143.7 MB in the beginning and 205.0 MB in the end (delta: 61.3 MB). Free memory was 95.6 MB in the beginning and 183.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.95 ms. Allocated memory is still 205.0 MB. Free memory was 183.3 MB in the beginning and 170.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1199.38 ms. Allocated memory is still 205.0 MB. Free memory was 169.4 MB in the beginning and 128.2 MB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 33. Possible FailurePath: [L12] float pi = 3.14159 ; VAL [\old(pi)=0, pi=314159/100000] [L18] float x = __VERIFIER_nondet_float() ; [L19] float octant = pi/3 ; VAL [pi=314159/100000, x=2] [L20] CALL assume_abort_if_not(x > 0 && x < octant) VAL [\old(cond)=1, pi=314159/100000] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, pi=314159/100000] [L20] RET assume_abort_if_not(x > 0 && x < octant) VAL [pi=314159/100000, x=2] [L21] float oddExp = x ; [L22] float evenExp = 1.0 ; [L23] float term = x ; [L24] unsigned int count = 2 ; [L25] int multFactor = 0 ; [L26] int temp ; VAL [count=2, evenExp=1, multFactor=0, oddExp=2, pi=314159/100000, term=2, x=2] [L28] COND TRUE 1 [L30] term = term * (x/count) VAL [count=2, evenExp=1, multFactor=0, oddExp=2, pi=314159/100000, x=2] [L31] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [(count>>1 % 2 == 0) ? 1 : -1=-1, count=2, evenExp=1, multFactor=0, oddExp=2, pi=314159/100000, x=2] [L31] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L33] evenExp = evenExp + multFactor*term [L35] count++ [L37] term = term * (x/count) [L39] oddExp = oddExp + multFactor*term [L41] count++ [L43] temp = __VERIFIER_nondet_int() [L44] COND TRUE temp == 0 VAL [count=4, multFactor=-1, pi=314159/100000, temp=0, x=2] [L47] CALL __VERIFIER_assert( oddExp >= evenExp ) VAL [\old(cond)=0, pi=314159/100000] [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, pi=314159/100000] [L10] __VERIFIER_error() VAL [\old(cond)=0, cond=0, pi=314159/100000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 1 SDslu, 18 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 693 SizeOfPredicates, 1 NumberOfNonLiveVariables, 104 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...