/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/odd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:04:05,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:04:05,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:04:05,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:04:05,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:04:05,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:04:05,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:04:05,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:04:05,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:04:05,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:04:05,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:04:05,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:04:05,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:04:05,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:04:05,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:04:05,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:04:05,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:04:05,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:04:05,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:04:05,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:04:05,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:04:05,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:04:05,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:04:05,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:04:05,263 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:04:05,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:04:05,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:04:05,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:04:05,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:04:05,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:04:05,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:04:05,265 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:04:05,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:04:05,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:04:05,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:04:05,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:04:05,267 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:04:05,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:04:05,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:04:05,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:04:05,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:04:05,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:04:05,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:04:05,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:04:05,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:04:05,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:04:05,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:04:05,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:04:05,737 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:04:05,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/odd.c [2020-10-23 22:04:05,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1801e8726/8ccaaf5db5774943941d151ab45de768/FLAG6abb194ea [2020-10-23 22:04:06,488 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:04:06,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/odd.c [2020-10-23 22:04:06,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1801e8726/8ccaaf5db5774943941d151ab45de768/FLAG6abb194ea [2020-10-23 22:04:06,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1801e8726/8ccaaf5db5774943941d151ab45de768 [2020-10-23 22:04:06,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:04:06,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:04:06,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:04:06,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:04:06,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:04:06,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:04:06" (1/1) ... [2020-10-23 22:04:06,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a5d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:06, skipping insertion in model container [2020-10-23 22:04:06,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:04:06" (1/1) ... [2020-10-23 22:04:06,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:04:06,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:04:07,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:04:07,124 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:04:07,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:04:07,158 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:04:07,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:07 WrapperNode [2020-10-23 22:04:07,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:04:07,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:04:07,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:04:07,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:04:07,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:07" (1/1) ... [2020-10-23 22:04:07,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:07" (1/1) ... [2020-10-23 22:04:07,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:07" (1/1) ... [2020-10-23 22:04:07,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:07" (1/1) ... [2020-10-23 22:04:07,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:07" (1/1) ... [2020-10-23 22:04:07,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:07" (1/1) ... [2020-10-23 22:04:07,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:07" (1/1) ... [2020-10-23 22:04:07,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:04:07,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:04:07,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:04:07,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:04:07,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:04:07,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:04:07,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:04:07,281 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:04:07,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:04:07,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:04:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:04:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:04:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:04:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:04:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:04:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:04:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:04:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:04:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:04:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:04:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:04:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:04:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:04:07,541 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:04:07,541 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:04:07,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:04:07 BoogieIcfgContainer [2020-10-23 22:04:07,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:04:07,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:04:07,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:04:07,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:04:07,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:04:06" (1/3) ... [2020-10-23 22:04:07,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1913ec8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:04:07, skipping insertion in model container [2020-10-23 22:04:07,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:04:07" (2/3) ... [2020-10-23 22:04:07,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1913ec8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:04:07, skipping insertion in model container [2020-10-23 22:04:07,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:04:07" (3/3) ... [2020-10-23 22:04:07,554 INFO L111 eAbstractionObserver]: Analyzing ICFG odd.c [2020-10-23 22:04:07,592 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:04:07,598 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:04:07,620 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:04:07,681 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:04:07,682 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:04:07,682 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:04:07,682 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:04:07,682 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:04:07,682 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:04:07,682 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:04:07,683 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:04:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-23 22:04:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 22:04:07,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:04:07,713 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] [2020-10-23 22:04:07,714 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:04:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:04:07,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2080136508, now seen corresponding path program 1 times [2020-10-23 22:04:07,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:04:07,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812878884] [2020-10-23 22:04:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:04:07,843 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:04:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:08,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:04:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:04:08,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812878884] [2020-10-23 22:04:08,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:04:08,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 22:04:08,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506685235] [2020-10-23 22:04:08,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 22:04:08,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:04:08,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 22:04:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:04:08,273 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-23 22:04:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:04:08,410 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-23 22:04:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 22:04:08,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-23 22:04:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:04:08,426 INFO L225 Difference]: With dead ends: 53 [2020-10-23 22:04:08,426 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 22:04:08,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:04:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 22:04:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 22:04:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 22:04:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-23 22:04:08,506 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2020-10-23 22:04:08,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:04:08,508 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-23 22:04:08,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 22:04:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-23 22:04:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 22:04:08,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:04:08,511 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] [2020-10-23 22:04:08,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:04:08,512 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:04:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:04:08,514 INFO L82 PathProgramCache]: Analyzing trace with hash -655890547, now seen corresponding path program 1 times [2020-10-23 22:04:08,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:04:08,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454008473] [2020-10-23 22:04:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:04:08,530 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:04:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:08,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:04:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:04:08,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454008473] [2020-10-23 22:04:08,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:04:08,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:04:08,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755314651] [2020-10-23 22:04:08,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:04:08,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:04:08,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:04:08,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:04:08,689 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 6 states. [2020-10-23 22:04:08,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:04:08,977 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-23 22:04:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:04:08,978 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-23 22:04:08,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:04:08,980 INFO L225 Difference]: With dead ends: 41 [2020-10-23 22:04:08,980 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 22:04:08,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:04:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 22:04:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-23 22:04:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 22:04:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-23 22:04:08,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2020-10-23 22:04:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:04:09,000 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-23 22:04:09,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:04:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-23 22:04:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 22:04:09,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:04:09,003 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-23 22:04:09,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:04:09,004 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:04:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:04:09,006 INFO L82 PathProgramCache]: Analyzing trace with hash 218555764, now seen corresponding path program 1 times [2020-10-23 22:04:09,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:04:09,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800336522] [2020-10-23 22:04:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:04:10,200 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 22:04:11,101 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 22:04:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:04:11,150 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:04:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:04:11,189 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:04:11,224 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 22:04:11,224 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 22:04:11,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:04:11,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:04:11 BoogieIcfgContainer [2020-10-23 22:04:11,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 22:04:11,248 INFO L168 Benchmark]: Toolchain (without parser) took 4387.15 ms. Allocated memory is still 157.3 MB. Free memory was 134.3 MB in the beginning and 98.9 MB in the end (delta: 35.4 MB). Peak memory consumption was 36.1 MB. Max. memory is 8.0 GB. [2020-10-23 22:04:11,250 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 157.3 MB. Free memory was 131.6 MB in the beginning and 131.5 MB in the end (delta: 120.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:04:11,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.21 ms. Allocated memory is still 157.3 MB. Free memory was 133.7 MB in the beginning and 124.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 22:04:11,257 INFO L168 Benchmark]: Boogie Preprocessor took 36.13 ms. Allocated memory is still 157.3 MB. Free memory was 124.7 MB in the beginning and 123.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 22:04:11,259 INFO L168 Benchmark]: RCFGBuilder took 346.54 ms. Allocated memory is still 157.3 MB. Free memory was 123.1 MB in the beginning and 109.4 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 22:04:11,264 INFO L168 Benchmark]: TraceAbstraction took 3695.00 ms. Allocated memory is still 157.3 MB. Free memory was 109.0 MB in the beginning and 98.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2020-10-23 22:04:11,270 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 157.3 MB. Free memory was 131.6 MB in the beginning and 131.5 MB in the end (delta: 120.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 292.21 ms. Allocated memory is still 157.3 MB. Free memory was 133.7 MB in the beginning and 124.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.13 ms. Allocated memory is still 157.3 MB. Free memory was 124.7 MB in the beginning and 123.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 346.54 ms. Allocated memory is still 157.3 MB. Free memory was 123.1 MB in the beginning and 109.4 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3695.00 ms. Allocated memory is still 157.3 MB. Free memory was 109.0 MB in the beginning and 98.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 1; [L13] COND TRUE __VERIFIER_nondet_int() [L14] x += 2 [L13] COND FALSE !(__VERIFIER_nondet_int()) [L16] CALL __VERIFIER_assert(x % 2) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "odd.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.5s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 33 SDslu, 66 SDs, 0 SdLazy, 60 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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, 2 StatesRemovedByMinimization, 1 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 proved your program to be incorrect! Received shutdown request...